CPT 92943: Complete Billing Guide, Description, Modifiers, and Medicare Reimbursement (2026)
If your cath lab billed 92943 with 92944 on a 2026 date of service, that claim was wrong before it left the building. CPT 92944 no longer exists, 92943 now describes only the antegrade approach, and a new code, 92945, covers the combined antegrade and retrograde technique. Numerous online manuals still instruct on the 2025 regulations.
This guide explains what CPT 92943 reports in 2026, when it applies, how to document it, which modifiers matter, and what Medicare pays. It is written for coders, interventional cardiology practices, and RCM teams who want claims that pay the first time and survive an audit.
Quick answer: CPT 92943 reports percutaneous revascularization of a chronic total occlusion (CTO) in a single coronary artery, branch, or bypass graft using an antegrade approach. Any mix of stenting, atherectomy, and angioplasty is included. Report it with a coronary vessel modifier (LD, LC, RC, LM, or RI). It has no add-on code in 2026.
What Is CPT Code 92943?
CPT 92943 is the PCI code for a chronic total occlusion: a coronary artery, branch, or graft that is completely blocked and has been for some time. The operator reopens it by advancing the wire forward through the occlusion from the proximal side. That is the antegrade approach.
CTO work sits at the demanding end of interventional cardiology. Cases run long, contrast and radiation loads climb, and success is never guaranteed. A standard stent code under-describes that effort, so CPT gives CTO its own code family.
| Item | Detail |
|---|---|
| Code | 92943 |
| Service | PCI of a coronary CTO, antegrade approach |
| What it includes | Any combination of stent, atherectomy, and angioplasty in that artery, branch, or graft |
| Add-on code | None. 92944 was deleted effective January 1, 2026 |
| Closest relatives | 92945 (combined approach), 92941 (acute MI), 92928/92930 (non-occlusive stenting) |
| Usual modifiers | LD, LC, RC, LM, RI; 22, 62, and XS/59 in specific situations |
| Common diagnosis | I25.82 (chronic total occlusion of coronary artery), with supporting clinical documentation |
| Claims | Professional claim from the operator; separate facility claim |
92943 CPT Code Overview: Modifications in 2026
The official wording belongs to the AMA, so check your CPT codebook for the exact text. In substance, 92943 reports revascularization of a CTO in a single coronary artery, branch, or bypass graft, including the major branches the graft supplies, via an antegrade approach.
Three changes took effect January 1, 2026:
The branch add-on codes were eliminated, and 92944 was deleted along with the others. A second occluded branch no longer produces an add-on line.
92943 was revised so its descriptor specifies the antegrade approach.
92945 was added for CTO revascularization using both antegrade and retrograde approaches. It is a standalone base code, not an add-on, despite what some guides claim.
Branch work now folds into the base code for that artery. If your charge master or encoder still carries 92944, fix it now. Code sets must also follow the date of service, because 2025 claims still use the old structure. Our CPT 92930 guide covers the other new PCI code from the same update.
When to Use CPT 92943
Use 92943 when the record shows a true CTO was revascularized antegrade. These distinctions cause most of the confusion:
92941 applies to an acute total or subtotal occlusion during an acute MI. A chronic blockage in a patient who recently experienced an MI elsewhere is not necessarily 92941. Our CPT 92941 guide walks through that line.
92945 applies to the same CTO when the operator needed both antegrade and retrograde (collateral channel) access.
92928, 92930, and 92933 apply to non-occlusive disease. See the guides on atherectomy with stenting (92933) and bypass graft PCI (92937) for general graft work.
Chronicity is the weak point in most CTO claims. Reviewers seek the absence of antegrade flow in the lumen, bridging collaterals, calcification at the proximal cap, and earlier imaging that indicates the occlusion. Sources differ on whether a minimum duration applies, and three months is the figure you see most. Confirm what your 2026 codebook and each payer require, and document estimated duration whenever you know it.
Who Can Bill CPT 92943
The interventional cardiologist who performed the procedure bills the professional component on the physician claim. The hospital or ASC bills the facility side separately, which reflects devices and supplies.
Two edge cases need a decision before the claim goes out:
Dual operators. Hybrid CTO cases sometimes involve two experienced operators. Each needs documentation of distinct work, and modifier 62 depends on the fee schedule’s co-surgery indicator and the payer.
Assistants. Payment for assistant-at-surgery services differs based on the payer and the code, so verify the indicator prior to billing one.
Practices with steady cath-lab volume often hand this layer to dedicated interventional cardiology billing specialists, because the rules change every January.
Documentation for CPT 92943
A good CTO operative note tells the story of why this was a CTO, how it was crossed, and what was achieved. This is what auditors look for:
| Element | What the note should show |
|---|---|
| Indication | Symptoms, medical therapy tried, ischemia or viability evidence, and the reason for revascularization |
| Occlusion evidence | 100% occlusion, TIMI 0 flow, collaterals, signs of chronicity, estimated duration |
| Target | The named artery, branch, or graft |
| Approach | “Antegrade” stated explicitly, plus any retrograde attempt (this decides 92943 vs 92945) |
| Technique | Wires, microcatheters, crossing strategy, and re-entry methods if used |
| Devices | Balloon, atherectomy device, stent number, size, and length |
| Result | Final TIMI flow, residual stenosis, complications |
| Complexity | Procedure time, fluoroscopy, and contrast, if modifier 22 is contemplated |
| Adjuncts | IVUS/OCT, lithotripsy, or physiology measurements, each with its own indication |
| Authentication | Operator names, roles, signatures, and timestamps |
Our cardiology documentation requirements guide covers the broader chart standards behind these elements.
Does CPT 92943 Need a Modifier?
The code does not include a required modifier, but in practice, the coronary vessel modifier is anticipated. PCI claims identify the treated artery with LD (left anterior descending), LC (left circumflex), RC (right coronary), LM (left main), or RI (ramus intermedius). Leaving it off can trigger a rejection or, worse, a quiet downpayment. Everything else depends on the case.
92943 Modifier Use Cases
| Modifier | When it fits 92943 | Watch out for |
|---|---|---|
| LD / LC / RC / LM / RI | Every claim, to name the treated artery | Must match the op note; graft PCI uses the artery the graft supplies |
| 22 | Documented, quantified extra work beyond a typical CTO case | A long case alone does not qualify; the note must explain why |
| 62 | Two physicians each performed distinct parts of the procedure | Needs both physicians’ documentation and payer acceptance |
| XS / 59 | A distinctly reportable service within a separate structure, where a payer modification would typically consolidate it. | Never append to add-on imaging or physiology codes that need no unbundling |
| 76 / 77 | Repeat procedure on the same day | Rare; document the medical reason for the repeat |
Modifier 26 and the technical-component modifiers do not apply here, since 92943 is a global procedure code and not a split diagnostic service.
CPT Code 92943 Medicare Reimbursement
Medicare pays physicians for 92943 under the Physician Fee Schedule and pays facilities under OPPS (hospital outpatient) or the ASC payment system. A manufacturer’s summary of the 2026 final rules lists national average, unadjusted amounts of about $634 for the physician, $11,794 for the hospital outpatient facility (APC 5193), and $7,883 for an ASC.
| Setting | 2026 national average (unadjusted) |
|---|---|
| Physician (MPFS) | ~$634 |
| Hospital outpatient (OPPS, APC 5193) | ~$11,794 |
| ASC | ~$7,883 |
Treat these as benchmarks, not predictions. Your actual payment shifts with geographic adjustments, sequestration, patient cost-sharing, and facility factors. The same summary lists 92945 at roughly the same physician rate (about $632) as 92943, so don’t assume the retrograde code pays more on the professional side. Verify your locality’s figures in CMS’s fee schedule lookup tool.
Reimbursement issues often lurk in underpayments rather than outright denials. Disciplined payment posting catches claims paid at a lower PCI tier because a vessel modifier or base code was off, and a broader cardiology revenue cycle management process keeps those patterns visible.
Medicare vs. Commercial Insurance Considerations
| Area | Traditional Medicare | Medicare Advantage / Commercial |
|---|---|---|
| Coverage basis | Medical necessity under national and local coverage policy | Plan medical policy, which may be stricter |
| Prior authorization | Generally not required for PCI | Often required for elective PCI; emergencies are usually exempt |
| 2026 code handling | Follows the 2026 CPT code set and fee schedule | Policies and contracts may lag; confirm adoption of 92945 and the 92944 deletion |
| Payment | Fee schedule, OPPS, ASC rates | Contracted rates, often a percentage of Medicare |
| Appeals | Defined appeal levels | Contract-specific deadlines |
Policies vary by payer, plan, and date of service. Check each payer’s current policy before assuming anything.
Common Billing Mistakes and Denials
| Mistake | What happens | Fix |
|---|---|---|
| Billing deleted 92944 | Rejection as an invalid code | Update the charge master and encoder for 2026 |
| Billing 92943 when both approaches were used | Under-coding, or a record that contradicts the claim | Code 92945 when the note supports both approaches |
| Missing or mismatched vessel modifier | Rejection or reduced payment | Match the modifier to the op note |
| Weak chronicity evidence | Medical necessity denial or downcoding to a standard PCI code | Document occlusion and chronicity findings explicitly |
| Diagnostic cath billed with PCI on the same vessel | Bundling denial | Bill the cath only when documented exceptions apply |
| Modifier 22 without quantified extra work | Denial or audit exposure | Explain the added effort in numbers and facts |
| No authorization for elective PCI | Full denial | Verify authorization before the procedure |
Most of these denials come down to the chart, not the claim. A structured denial management process sorts them by root cause, and our guide to cardiology claim denials and appeals shows how to respond. The same-vessel cath rule trips up even experienced teams, so see our coronary angiography coding guide.
Real-World Examples
These are hypothetical scenarios for illustration.
Example 1: Clean antegrade CTO
A patient with refractory angina and a documented 100% RCA occlusion with bridging collaterals undergoes successful antegrade recanalization and stenting. The note documents TIMI 0 flow before treatment and TIMI 3 after. Correct reporting is 92943-RC. No add-on exists, and the stent count doesn’t change the code.
Example 2: Combined approach
An operator fails antegrade crossing of an LAD CTO, then crosses using a retrograde collateral channel and finishes with stenting. The note states both approaches. The code is 92945-LD, not 92943. If the note only says “CTO recanalized” without naming the approaches, the coder should query before billing.
Example 3: Two arteries
A patient has a CTO in the RCA and a separate non-occlusive LAD lesion stented in the same session. Each artery gets its own base code with its own vessel modifier: 92943-RC and 92928-LD. Work within each artery's branches is included. If a payer edit bundles the pair, confirm the documentation supports separate territories before appending any unbundling modifier.
Billing Workflow Tips and Compliance Checklist
- Update encoders and charge masters for the 2026 PCI code set and block 92944.
- Verify authorization for elective cases before scheduling, with CPT codes and vessels listed.
- Pull the cath report before coding, not the schedule.
- Confirm the approach (antegrade or combined) in the note’s own words.
- Match the vessel modifier to the named artery.
- Retain modifier 22 unless the notation specifies the additional work.
- Check NCCI edits and the same-vessel diagnostic cath rule before release.
- Run claims submission and tracking checks for demographics and authorization numbers.
- Audit a sample of CTO cases quarterly against the op notes.
- Send provider feedback on recurring documentation gaps.
How Professional Cardiology Billing Services Help
CTO claims are low in volume and high in value, so one coding slip costs real money. A specialty team brings coders who track the January code changes, review op notes before release, and watch payer behavior on newer codes like 92945. They also manage the less glamorous tasks: tracking authorizations, auditing vessel modifiers, and appeals focused on the specific reasons for denial.
Cardiology medical billing support works best when medical coding and denial follow-up sit in the same workflow as charge capture. Practices that run cath labs may also benefit from invasive cardiology billing support. No service can guarantee payment, but a consistent process catches most preventable errors before submission.
Frequently Asked Questions
What is the difference between CPT codes 92943 and 92945?
92943 reports CTO revascularization using an antegrade approach. 92945 reports the same work when both antegrade and retrograde approaches were used. Both are base codes in 2026.
Does CPT 92943 require a modifier?
Not by itself, but payers expect a coronary vessel modifier (LD, LC, RC, LM, or RI). Modifiers such as 22, 62, or XS depend on documented circumstances.
Is CPT 92944 still valid?
Not for 2026 dates of service. It was deleted effective January 1, 2026, and earlier dates of service still follow the earlier rules.
Can I bill diagnostic catheterization with 92943?
Generally not for the same vessel. Payers and CPT guidance allow it only in documented exceptions, such as no prior diagnostic study or a changed clinical condition.
Can IVUS, OCT, or lithotripsy be billed with 92943?
They are typically reportable as separate add-on services when performed and documented. Confirm payer policy for each.
How can I invoice another CTO in a separate sector?
Each major artery gets its own base code and vessel modifier. Confirm NCCI and payer handling before submitting.
Does 92943 need prior authorization?
Typically, traditional Medicare does not necessitate it. Many commercial and Medicare Advantage plans do for elective PCI.
Is CPT 92943 covered by Medicare?
Medicare pays when the procedure is medically necessary and documented. Local coverage policy can add requirements, so check your contractor.
Can an ASC bill 92943?
The 2026 ASC payment schedule lists a rate for it. Facility eligibility and contracts still vary, so confirm before scheduling.
What if the CTO cannot be crossed?
Reporting an unsuccessful attempt depends on current CPT guidance and payer policy. Examine both before selecting a code or a reduced-service modifier.
Key Takeaways
- 92943 now describes antegrade CTO PCI only; 92944 is deleted.
- 92945 is a new base code for combined antegrade and retrograde CTO PCI, not an add-on.
- Vessel modifiers are expected; other modifiers need documented support.
- Chronicity evidence and the named approach drive correct code choice.
- Medicare benchmarks for 2026 are about $634 (physician), $11,794 (hospital outpatient), and $7,883 (ASC), before adjustments.
- Authorization and payer policy differ widely outside traditional Medicare.
Conclusion
CPT 92943 appears straightforward in theory but is harsh in application. The 2026 reorganization eliminated a known component, divided the CTO group by method, and placed greater emphasis on the operative note. Practices that update their systems, document chronicity and approach clearly, and audit CTO claims against the chart will avoid most of the trouble. If your team wants a second set of eyes on its PCI claims, contact our cardiology billing team.
