Most cardiology practices measure their billing performance by how many clean claims they submit and how quickly denials get worked. Payment posting rarely gets the same attention and that is where a lot of preventable revenue leakage hides. A payment can arrive, hit the deposit and still be posted to the wrong claim, carry the wrong adjustment, or bury a denial that never reaches the people who could recover it. When that happens, the accounts receivable reports every downstream decision depends on stop telling the truth.

This guide walks through cardiology payment posting the way an experienced revenue cycle team actually handles it: how insurance and patient payments get recorded, how electronic and paper remittances are read, how adjustments and patient responsibility are applied and how posting connects to denial management, AR follow-up and financial reporting. Cardiology adds its own wrinkles because of split professional and technical billing, high-dollar procedures and payer-specific coverage rules, so payment posting in a cardiovascular practice is rarely as simple as keying in a dollar amount.

What Is Cardiology Payment Posting?

Cardiology payment posting is the process of recording payments, contractual adjustments, patient responsibility, denials and other remittance information against the correct patient accounts and claims after a payer has adjudicated them. It is the point in the revenue cycle where the practice reconciles what it billed with what the payer actually decided to pay and where the remaining balance is either closed, routed to the patient, or flagged for follow-up.

Posting is not the same as data entry. Entering a payment amount tells you money arrived. Posting tells you why the payer paid what it paid, what the practice is contractually required to write off, what the patient still owes, whether a secondary payer should be billed and whether any part of the claim was denied or underpaid. That interpretation is what makes payment posting a decision point rather than a clerical step.

Payment posting sits between claim adjudication and the rest of the back end. It feeds accounts receivable, patient statements, denial management, underpayment review, credit-balance handling and financial reporting. When posting is accurate, every one of those functions works from reliable numbers. When it is careless, they inherit the errors. Accurate posting is one of the quieter foundations of dependable revenue cycle management for cardiology, because almost every financial report a practice produces is built on top of it.

Why Payment Posting Matters in Cardiology Revenue Cycle Management

Accurate posting supports reliable AR balances, correct patient statements, timely follow-up, denial identification, underpayment detection, credit-balance control and cash reconciliation. Inaccurate posting distorts all of them at once, which is why posting errors often surface as unexplained AR aging or patient billing complaints rather than as posting problems.

A cardiology practice can easily run several payers, multiple electronic remittance files a week, paper checks with attached explanations of benefits, patient card payments and secondary-payer transactions all at the same time. Each of those has to land on the right claim with the right adjustment and the right responsibility split. Miss the adjustment and the claim looks unpaid when it is actually closed. Miss a denial line inside an otherwise-paid remittance and a recoverable dollar amount quietly ages out. Post patient responsibility incorrectly and the statement that goes out is wrong, which erodes trust and generates avoidable phone calls.

Payment posting will not, on its own, determine a practice’s profitability or how much a payer reimburses. Those depend on coding accuracy, contracts, coverage policy and front-end work. What posting does is make the financial picture trustworthy enough to act on. Without it, denial trends, underpayment patterns and AR priorities are guesses.

How the Cardiology Payment Posting Process Works

A dependable posting workflow follows the same path whether the remittance is electronic or paper. The order matters, because skipping straight to the dollar amount is exactly how downstream errors are created.

Receiving payments and remittance information

Every posting session starts with identifying what actually arrived: an electronic funds transfer, a paper check, a patient card payment, or a lockbox deposit. Each needs to be tied to its corresponding remittance before posting begins, because the remittance is what explains the payment.

Reviewing EOBs and ERAs

The remittance is read line by line. For each service, the poster is looking at the billed charge, the allowed amount, the paid amount, the adjustment, the patient responsibility and any adjustment or remark codes. In cardiology this line-level detail is not optional, because a single claim can carry a professional component, a technical component and multiple procedure lines that were each adjudicated differently.

Matching payments to claims and patient accounts

The payment has to reach the correct patient, the correct claim and the correct service line. Matching on patient name alone is a common source of misposting, especially with common names or family members on the same plan. Claim number and date of service are more reliable identifiers.

Posting insurance payments

Insurance payments are posted at the line level so the account reflects exactly what the payer allowed on each service. Posting a lump sum against a multi-line cardiology claim without breaking it out makes later underpayment review and secondary billing far harder.

Posting contractual adjustments

Contractual adjustments record the difference between the billed charge and the contracted allowed amount. They should be posted from the remittance and validated against the applicable contract, not applied as a habit or a fixed percentage.

Posting patient responsibility

Deductible, copayment, coinsurance and non-covered amounts are posted so the patient balance is accurate before any statement goes out. Getting this wrong is one of the fastest ways to generate patient complaints and rework.

Reconciling the payment

The posted total is reconciled against the deposit or EFT. If the batch does not balance, the discrepancy is investigated before the batch is finalized rather than after.

Routing denials, variances and exceptions

Anything that is not a clean, expected payment  a denial, a partial payment, a zero-pay line, an unexpected adjustment, an unapplied amount  is routed to the team that can resolve it. Simply resubmitting a denied line without understanding the remittance tends to produce a second denial.

EOB vs ERA vs EFT: Clearing Up the Confusion

These three terms get used interchangeably and mixing them up is a frequent source of reconciliation problems. They describe different things.

An EOB is the readable document explaining how a claim was adjudicated  allowed amount, paid amount, adjustments, patient responsibility and any denial or remark information. Paper EOBs still require manual posting.

An ERA is the electronic remittance advice, transmitted in the HIPAA-standard 835 transaction format. According to CMS, the 835 was designed to permit automated reconciliation of a provider’s accounts receivable and it carries the adjustment and remark codes that let posting software apply payments, adjustments and responsibility with far less manual keying. In practice, “ERA” and “835” are used interchangeably. An ERA is remittance information  it explains the payment; it is not the payment itself.

An EFT is the electronic transfer of the actual funds, typically through the ACH network. It represents money hitting the bank account.

EFT vs ERA and why reassociation matters

Because the ERA (the explanation) and the EFT (the money) travel separately, they have to be matched back together. CMS calls this reassociation. The HIPAA standards require health plans to include a unique Reassociation Trace Number, or TRN, in the EFT and a matching TRN in the corresponding ERA, so the payment can be tied to the correct remittance. CMS notes that reassociation failures are one of the more common operating-rule compliance issues, which is exactly why posting teams need to confirm that the ERA, the EFT and the bank deposit all agree before a batch is closed.

Understanding CARC, RARC and group codes

Remittances speak in codes and reading them correctly is central to accurate posting. According to CMS and the X12 standards that govern the 835:

• CARC (Claim Adjustment Reason Code) explains why a claim or service line was paid differently than billed. CARCs are maintained through X12.
• RARC (Remittance Advice Remark Code) provides additional explanation or supplemental detail for an adjustment. RARCs are maintained by CMS through the Washington Publishing Company. HIPAA requirements generally call for at least one RARC when several CARCs appear on a line, to make the payer’s decision clearer.
• Group codes tell the poster who is responsible for each adjustment. The common ones are CO (Contractual Obligation, a provider write-off), PR (Patient Responsibility), OA (Other Adjustment), PI (Payer-Initiated Reduction) and CR (Corrections and Reversals).

The practical takeaway is that the group code drives where a balance goes. A CO line is written off; a PR line moves to the patient; an OA or PI line usually needs review. A poster who reads only the paid amount and ignores the codes will misroute balances routinely. Payers do not all format their remittances identically and some map internal reasons to the standard codes differently, so posting teams should not assume every payer’s ERA reads the same way.

Insurance Payment Posting in Cardiology

Insurance payment posting should reflect the payer’s remittance and the applicable contractual or regulatory requirements, not an assumption about what the payer “should” have paid.

Primary insurance

Primary payments are posted line by line, with the allowed amount, payment, contractual adjustment and patient responsibility recorded for each service. For cardiology claims that split into professional and technical components, each component is posted separately so the account stays accurate.

Secondary insurance and coordination of benefits

Before any remaining balance is assigned to the patient, the poster should determine whether a secondary payer exists. When a primary payer leaves patient responsibility, coordination of benefits may reduce or eliminate what the patient owes once the secondary plan adjudicates. Reviewing the primary remittance carefully  what it allowed, what it paid, what it left as responsibility  is what tells the poster whether to bill a secondary payer or move the balance to the patient. Skipping this step is a frequent cause of patients being billed for amounts a secondary plan would have covered.

Contractual adjustments

Contractual adjustments are the difference between the billed charge and the contracted allowed amount and they represent money the practice agreed to write off as a condition of participation. They should never be confused with bad-debt write-offs, which are uncollected patient balances. Adjustments are posted from the remittance and validated against the payer contract; they should not be applied as an arbitrary percentage or a shortcut to close a claim.

Partial payments and underpayments

A payment that is smaller than expected is not automatically an underpayment. Often the lower amount simply reflects the contracted allowed amount, the deductible being applied, or bundling. A true underpayment is a payment below the contractual or policy amount and identifying it requires comparing the remittance against the fee schedule or contract, not against the billed charge.

Overpayments, recoupments and takebacks

Payers sometimes recover money they previously paid, either by requesting a refund or by offsetting it against a future payment  a recoupment or takeback. These appear on remittances and have to be posted correctly so the affected claim’s balance is restored and the offset is reflected. Refund and recoupment procedures vary by payer, contract and applicable law, so posting teams follow the specific payer’s process rather than a single universal rule.

Patient Payment Posting

Patient payment posting covers copayments, deductibles, coinsurance, self-pay balances, point-of-service collections, online payments, checks and card payments. Each payment has to be matched to the correct account and, where relevant, the correct visit or claim, so patient balances stay accurate.

The common failure points are posting a patient payment to the wrong account, posting it against the wrong date of service, or leaving it as an unidentified receipt when the patient cannot be matched. Point-of-service copays collected at the front desk deserve particular attention, because a copay collected but posted to the wrong encounter creates a balance discrepancy that surfaces later as a confused patient and a manual correction.

Unapplied and Unidentified Payments

An unapplied payment is money the practice has received and recorded but has not yet applied to a specific claim or charge. An unidentified payment is money received that cannot yet be matched to a patient or payer at all. Both represent cash sitting in limbo and both distort AR reporting until they are resolved.

Payments end up unapplied or unidentified for predictable reasons: a remittance that has not arrived yet, a missing or unreadable claim number, a payment for a patient who cannot be located in the system, a lump-sum EFT covering claims that have not all been matched, or a takeback that has not been reconciled. Left alone, unapplied cash overstates collections in one place and understates them in another, which makes AR balances unreliable and complicates month-end reconciliation.

The right response is to investigate and resolve, not to force the money onto the nearest account to make a batch balance. Posting a payment to an account without adequate verification simply moves the error somewhere harder to find. Practical control comes from aging unapplied and unidentified cash, assigning ownership for research and setting a routine for working the oldest items first.

Underpayments and Payment Variance Analysis

A payment variance is a difference between the expected reimbursement and what the payer actually paid. Identifying variances is one of the more valuable things a posting team does and one of the easiest to get wrong.

The billed amount is not the benchmark. What a claim was billed at tells you almost nothing about what it should have been paid, because payers pay contracted or allowed amounts, not charges. To flag a real underpayment, the poster compares the payment against the contract terms, the fee schedule, the allowed amount on the remittance and the claim details. That comparison is what separates a normal contractual adjustment from a genuine shortfall.

Meaningful variance analysis requires access to payer contracts, fee schedules, remittance data and claim detail. Without the contracted rates, a posting team can only guess whether a payment was correct. When those pieces are available, posters can flag suspected underpayments for review and route them appropriately rather than writing them off by default. Because cardiology includes high-dollar procedures and diagnostic services with distinct professional and technical values, a small per-line variance can add up quickly across a busy schedule, which is why line-level posting and contract-based comparison matter.

Overpayments, Refunds and Credit Balances

Overpayments create both a financial and a compliance issue, so they need to be identified during posting rather than discovered later. They arise from duplicate payments, incorrect payer payments, patient overpayments, a secondary payer paying more than the remaining balance, or a payer that later determines it paid too much.

An overpayment usually shows up as a credit balance  an account that has been paid beyond what is owed. Credit balances should be reviewed and routed for appropriate resolution, whether that means a refund to the payer, a refund to the patient, or an adjustment supported by the remittance. For Medicare, CMS’s overpayment rule under Section 1128J(d) of the Social Security Act requires providers to report and return identified overpayments within a defined window (generally 60 days after identification), which is one reason unmonitored credit balances are a risk rather than just an accounting nuisance. Refund and recoupment timelines and procedures differ by payer, contract and jurisdiction, so specific deadlines should be confirmed for the actual payer and situation rather than assumed.

The controllable part is monitoring. Credit balances that are reviewed on a schedule get resolved; credit balances that pile up unreviewed become a compliance exposure.

Common Cardiology Payment Posting Errors

The following table lists the posting mistakes that most often distort cardiology AR and patient balances, along with practical prevention.

Most of these trace back to one habit: posting the dollar amount without reading the remittance. The prevention column is really one idea repeated  verify the identifiers, read the codes and reconcile before finalizing.

Payment Posting Quality Control

Quality control in posting is about catching errors before they reach AR and patient statements. Practical measures include balancing each batch, reconciling deposits and EFTs, matching ERA to EFT by TRN, auditing a random sample of posted accounts, reviewing adjustments and credit balances, monitoring unapplied cash and producing exception reports for anything that did not post cleanly.

Segregation of duties adds a layer of protection: the person posting payments should not also be the only person authorizing adjustments or refunds without review. User-access controls, audit trails and supervisor review of high-dollar or unusual transactions round out a practical control set. None of this is one-size-fits-all  a small practice and a large cardiology group will implement controls at different scales  but the principles hold regardless of size.

How Payment Posting Connects to Denial Management

Payment posting is often where denials are first discovered, because a denial frequently arrives inside an otherwise-normal remittance rather than as a separate notice. A zero-pay line, a reduced payment, or a non-covered adjustment on an 835 is a denial that has to be recognized and acted on.

Posting feeds denial management by surfacing and categorizing these events. The CARC, RARC and group codes on the remittance are the starting point for root-cause work  they point toward whether the issue is coding, authorization, medical necessity, eligibility, duplicate submission, timely filing, or provider enrollment. From there, the account can be routed to coding review, corrected and rebilled, appealed, or sent to the appropriate front-end team.

The two functions should stay connected but distinct. Posting identifies and routes; denial management investigates and resolves. When posting quietly writes off denials instead of routing them, denial management never sees the pattern and the same denial keeps recurring. Many cardiology denials trace back to upstream issues, which is why they overlap heavily with the causes covered in a broader review of cardiology claim denials.

How Payment Posting Connects to AR Follow-Up

Accurate posting is what makes AR reports usable. Once payments, adjustments and responsibility are posted correctly, the AR shows exactly what remains  unpaid claims, partially paid claims, denials, patient balances and secondary-payer opportunities  so accounts receivable follow-up can prioritize real work instead of chasing phantom balances.

The inverse is the problem. If adjustments are missing, paid claims look open and staff waste time following up on money that already arrived. If denials were absorbed at posting, they never appear in AR at all. If unapplied cash is sitting unresolved, the AR total is simply wrong. Reliable AR depends on posting being right first.

Payment Reconciliation Workflow

Reconciliation confirms that what was posted matches the money that arrived. It should never rely on the total payment amount alone, because two batches can share a total and still contain offsetting errors.

1. Confirm the payment source and payer.
2. Confirm the deposit or EFT amount.
3. Review the ERA or EOB detail.
4. Match payments to claims and accounts.
5. Verify posted payments line by line.
6. Verify adjustments against the remittance.
7. Verify patient responsibility.
8. Investigate any unmatched amounts.
9. Resolve unapplied and unidentified payments.
10. Review variances against contract or fee schedule.
11. Finalize the batch once it balances.
12. Retain records and maintain the audit trail.

The reassociation step  matching the ERA and EFT by TRN and tying both to the bank deposit  is what confirms the electronic side actually reconciles. A batch that balances internally but does not match the deposit is not reconciled.

Medicare Payment Posting Considerations

Medicare remittances follow their own conventions and posting teams should treat Medicare rules as Medicare-specific rather than as a template for every payer. CMS provides Medicare-specific remittance guidance in the Medicare Claims Processing Manual (Publication 100-04, Chapter 22 – Remittance Advice) and Medicare Administrative Contractors (MACs) administer many operational details, which can vary by contractor, claim type and jurisdiction.

Several Medicare concepts affect posting directly:

• Remittance information. Medicare’s ERA carries the same CARC, RARC and group-code structure and payer-specific proprietary codes are not permitted on the standard 835.
• Adjustments and reductions. Medicare payment adjustments are posted from the remittance according to how the claim was adjudicated.
• Overpayments and recoupments. CMS’s 60-day overpayment rule requires identified overpayments to be reported and returned within the defined window and MACs may recover prior payments through recoupment or offset, which has to be posted so the affected claim and the offset both reconcile.
• Medicare Secondary Payer (MSP). When Medicare is secondary, the primary payer’s adjudication has to be accounted for before Medicare’s payment and any remaining responsibility are posted.

Because Medicare’s operational specifics can differ by MAC and by claim type, posting teams confirm current requirements against CMS and the relevant contractor rather than assuming a single national rule for every situation.

Commercial Payer Payment Posting Considerations

Commercial payers do not have to follow Medicare’s rules and in practice they often differ. Posting teams routinely encounter variation in contractual adjustments, remittance formatting, payment and coverage policies, patient-responsibility calculations, recoupment and refund procedures, timely-filing windows, appeal deadlines and claim-correction processes.

The practical implication is that a posting rule that is correct for Medicare may be wrong for a commercial plan and vice versa. Specific commercial payer policies should be verified against that payer’s current official documentation rather than generalized, because they are not standardized across the industry.

Denial, Rejection and Payment: How They Differ

Payment posting intersects with several revenue-cycle outcomes that get lumped together but call for different responses. Payer systems also use varying status language, so the labels below describe general meanings rather than universal terminology.

A rejection never reached adjudication, so there is no remittance to post  it is fixed and resubmitted. A denial went through adjudication and produced a remittance, so posting is where it is caught and routed. A zero-pay claim looks like nothing happened but often carries the full explanation in its adjustment and remark codes. Treating all of these the same way is a reliable route to repeat problems.

Cardiology-Specific Payment Posting Scenarios

The following are illustrative, hypothetical examples used to show how a posting team would think through common situations. They are not real patient cases.

Example 1: Echocardiography payment on an ERA

A practice receives an 835 for a transthoracic echocardiogram showing the billed charge, an allowed amount, a payer payment, a contractual adjustment and a patient responsibility amount.

The poster reviews the line-level detail, confirms the allowed and paid amounts reconcile with the adjustment and matches the payment to the correct claim and service line  including the professional and technical components if they were billed separately. The payment and the CO contractual adjustment are posted, the PR patient responsibility is posted and the posted total is reconciled against the EFT using the TRN. Any remaining balance  for example, patient responsibility with a possible secondary payer  is routed for the appropriate follow-up rather than immediately billed to the patient.

Example 2: Cardiac monitoring denial

A remittance shows that a cardiac monitoring service was denied, with a CARC and group code on the line.

The poster recognizes the denial rather than reading it as a simple zero payment, notes the CARC/RARC and reviews the claim information. Depending on what the codes indicate, the account is investigated for a coding issue, an authorization problem, a documentation gap, or a coverage limitation and then routed to denial management or the relevant front-end team. It is not simply rebilled, because rebilling without addressing the reason usually earns a second denial.

Example 3: Partial payment

A payer pays less than the practice expected on an interventional cardiology claim.

Before treating this as an underpayment, the poster checks the allowed amount and the adjustment detail. If the payment matches the contracted allowed amount after a deductible or bundling adjustment, it is correct and posts normally. If the payment falls below the contracted rate, the poster flags a payment variance and routes it for review against the fee schedule and contract.

Example 4: Secondary insurance

A primary payer adjudicates a cardiology claim and leaves patient responsibility.

The poster checks for secondary coverage and coordination-of-benefits information before assigning the remaining amount to the patient. If a secondary plan exists, the claim is billed to that payer; only the balance that remains after secondary adjudication moves to the patient. This prevents billing patients for amounts a secondary plan would have covered.

How to Improve Cardiology Payment Posting Accuracy

Accuracy comes from doing the right checks at the right stage, not from posting faster.

Before posting

Confirm the payer and payment source, tie the remittance to the deposit or EFT and make sure the posting team has access to the contracts and fee schedules needed to recognize variances. Clean, matched inputs prevent most misposting.

During posting

Post at the line level, read the CARC, RARC and group codes before applying anything, split professional and technical components correctly and post patient responsibility from the remittance rather than by assumption. Recognize denials and zero-pay lines as events that need routing.

During reconciliation

Balance every batch against the deposit or EFT, match the ERA and EFT by TRN and investigate discrepancies before finalizing. Do not close a batch that does not reconcile.

After posting

Age and resolve unapplied and unidentified cash, review credit balances on a schedule, audit a random sample of posted accounts and feed recurring denial and variance patterns back to the front-end and coding teams. Posting data is one of the better early-warning systems for upstream problems in cardiology medical billing  recurring authorization, eligibility, coding, or documentation issues tend to show up in remittances long before anyone reviews them directly.

Payment Posting Metrics Cardiology Practices Should Track

Metrics make posting performance visible. Definitions vary between organizations, so the numerator and denominator for any metric should be documented so the number means the same thing every time it is reported.

Useful measures include:

• Payment posting accuracy rate = correctly posted transactions ÷ audited transactions × 100
• Posting turnaround time  how long between receipt and posting
• Batch reconciliation rate  share of batches that balance to the deposit
• Unapplied cash volume and aging  how much cash is unresolved and how old it is
• Credit-balance volume  number and value of accounts in credit
• Payment variance volume and dollar value  suspected underpayments identified
• Denials identified through remittance review  how many denials posting surfaces
• Posting error rate  errors found on audit
• Refund volume  refunds identified and processed

These should be defined internally rather than benchmarked against invented industry figures, since credible, current benchmarks depend on the source and the way each metric is defined.

Documentation, Internal Controls and Compliance

Documentation and remittance information play two different roles and keeping them straight prevents confusion during posting and appeals. The clinical and claim documentation supports the billed service  the procedure report, diagnosis coding, medical necessity and authorization records. The remittance explains how the payer adjudicated that service. When a denial or underpayment is worked, both come together: the remittance says what the payer decided and the documentation supports what should have been paid.

On the control side, practical safeguards for posting include user permissions, segregation of duties, audit trails, payment-batch controls, deposit reconciliation, adjustment and refund authorization and periodic audits. HIPAA and general healthcare compliance apply throughout, since remittances and patient accounts contain protected information. Whether a specific control is legally required depends on the organization and applicable law, so a practice confirms its obligations with qualified advisors rather than assuming any single control is universally mandatory.

How Professional Cardiology Payment Posting Services Can Help

Payment posting becomes harder to manage as volume and payer complexity grow. A busy cardiology practice may process high daily payment volume across many payers, mix electronic and paper remittances, carry a backlog of unapplied cash, accumulate credit balances that need review and face underpayment analysis that requires contract data the front office does not have time to maintain. When posting falls behind, AR reporting becomes unreliable and denials embedded in remittances go unworked.

Outside support or a dedicated payment posting function can help when the internal team cannot keep posting current, when unapplied cash and credit balances are piling up, when ERA and EFT reconciliation is inconsistent, or when denials and underpayments identified during posting are not being routed and resolved. Professional support is most useful where it improves accuracy and turnaround and keeps posting connected to denial management and AR follow-up  not as a guarantee of faster payment, fewer denials, or higher reimbursement, which no service can responsibly promise. The value is in reliable, reconciled posting that the rest of the revenue cycle can trust.

Frequently Asked Questions

What is cardiology payment posting? Cardiology payment posting is the process of recording insurance and patient payments, contractual adjustments, patient responsibility, denials and other remittance information against the correct claims and accounts after a payer adjudicates them. It turns raw payment data into an accurate account balance the rest of the revenue cycle can act on.

Why is payment posting important in cardiology medical billing? It makes AR balances, patient statements, denial identification and financial reporting reliable. Inaccurate posting distorts all of those at once, so errors often show up as unexplained AR aging or patient billing complaints rather than as posting problems.

What is the difference between an EOB and an ERA? An EOB is a human-readable explanation of how a claim was processed, usually paper or PDF. An ERA is the electronic version, transmitted in the standardized 835 format, which supports automated or semi-automated posting. Both explain a payment; neither is the payment itself.

What is the difference between an ERA and an EFT? An ERA is remittance information that explains how a claim was adjudicated. An EFT is the electronic transfer of the actual funds. They travel separately and are matched using a Reassociation Trace Number (TRN) so the payment ties to the correct remittance.

How does insurance payment posting work? The team reviews the remittance line by line, matches the payment to the correct claim and account, posts the insurance payment, posts contractual adjustments and patient responsibility, identifies denials and secondary opportunities and reconciles the posted total against the deposit or EFT before finalizing the batch.

What is a contractual adjustment in medical billing? It is the difference between the billed charge and the contracted allowed amount that the practice agreed to write off as a condition of participation. It is posted from the remittance and validated against the contract and it is not the same as a bad-debt write-off.

How are patient payments posted? Copayments, deductibles, coinsurance and self-pay amounts are matched to the correct account and, where relevant, the correct visit, then posted so the patient balance is accurate. Point-of-service copays need particular care to avoid landing on the wrong encounter.

What happens when a cardiology claim is denied during payment posting? The denial is recognized from the remittance codes rather than treated as a plain zero payment, then routed to denial management or the appropriate team based on the CARC, RARC and group code. Resubmitting without addressing the reason usually produces another denial.

What is unapplied cash in medical billing? Unapplied cash is money the practice has received but not yet applied to a specific claim or charge; unidentified cash cannot yet be matched to a patient or payer at all. Both distort AR until resolved and should be investigated, not forced onto the nearest account.

How can payment posting errors affect accounts receivable? Missing adjustments make paid claims look open, absorbed denials disappear from AR entirely and unresolved unapplied cash makes the AR total wrong. Reliable follow-up depends on posting being accurate first.

How does payment posting help identify underpayments? By comparing the payment against the contract, fee schedule and allowed amount rather than the billed charge. A payment below the contracted rate is flagged as a variance and routed for review, while a payment matching the allowed amount is simply correct.

What should a payment poster do with a credit balance? Review it and route it for resolution  a refund to the payer or patient, or an adjustment supported by the remittance. Credit balances can signal overpayments and for Medicare, identified overpayments generally must be reported and returned within the defined window.

How does Medicare payment posting differ from commercial payer posting? Medicare follows CMS rules and MAC guidance, including the 60-day overpayment rule and Medicare Secondary Payer handling and its specifics can vary by contractor and claim type. Commercial payers follow their own contracts and policies, so posting rules correct for Medicare are not automatically correct for a commercial plan.

How can cardiology practices improve payment posting accuracy? Post at the line level, read the remittance codes before applying anything, split professional and technical components correctly, reconcile every batch to the deposit or EFT and resolve unapplied cash and credit balances on a schedule. Auditing a sample of posted accounts catches errors before they reach AR.

When should a cardiology practice consider professional payment posting services? When posting falls behind, unapplied cash and credit balances accumulate, ERA/EFT reconciliation is inconsistent, or denials and underpayments found during posting are not being routed and resolved. Outside support can help keep posting accurate and connected to the rest of the revenue cycle.

Key Takeaways

• Cardiology payment posting records payments, adjustments, patient responsibility and denials against the correct claims  it interprets the remittance, not just the dollar amount.
• EOB, ERA and EFT are distinct: the EOB and ERA explain the payment, the EFT moves the money and the TRN reassociates the ERA with the EFT.
• CARC, RARC and group codes (CO, PR, OA, PI, CR) determine where each balance goes; reading them wrong misroutes revenue.
• The billed charge is never the benchmark for underpayment  variances are identified against contracts and fee schedules.
• Unapplied cash, credit balances and absorbed denials are the quiet ways posting distorts AR; each needs monitoring and resolution.
• Medicare posting follows CMS and MAC rules, including the 60-day overpayment rule; commercial payers follow their own contracts and the two should not be treated as interchangeable.
• Accurate posting is what makes denial management, AR follow-up and financial reporting trustworthy.

Conclusion

Payment posting is where a cardiology practice finds out what its billing effort actually earned and where a surprising amount of recoverable revenue is either captured or lost without anyone noticing. Reading the remittance instead of the dollar amount, splitting professional and technical components, routing denials to the right team, reconciling every batch to the deposit and keeping unapplied cash and credit balances under control are the habits that keep AR honest and patient statements accurate.

For practices where volume, payer mix, or backlog has outpaced the posting team, treating payment posting as the connected discipline it is  tied to denial management, AR follow-up and reporting  is usually what turns unreliable financials back into numbers the practice can plan around.