CPT 92945: Complete Billing Guide, Documentation, and Medicare Rules (2026)
If a guide told you CPT 92945 is an add-on code billed alongside 92943, that guide is describing a code family that no longer exists. Since January 1, 2026, 92945 has been a standalone base code for one kind of case: a coronary chronic total occlusion (CTO) opened with combined antegrade and retrograde techniques.
This guide covers what the code means, when it applies, how it differs from 92943, what the op note must say, and where claims go wrong.
Quick Answer
CPT 92945 describes percutaneous revascularization of a coronary CTO within a single coronary artery, branch, or bypass graft utilizing both antegrade and retrograde techniques. It is new for 2026 and is a primary PCI code, not an add-on. CTO PCI using an antegrade approach alone stays under 92943.
What Is CPT 92945?
CPT 92945 is a Category I code in the coronary therapeutic section of the AMA CPT code set. It was created for the 2026 code year to capture the extra work of hybrid CTO procedures, which older codes didn’t distinguish from simpler antegrade cases. The AMA owns the exact descriptor, so check your 2026 CPT codebook for the official wording.
CPT 92945 Description, Decoded
- Target: one coronary artery, coronary branch, or bypass graft, including branches subtended by that graft.
- Intervention: any combination of stenting, atherectomy, and angioplasty. You don’t report those separately for the same vessel.
- Approach: antegrade and retrograde together. Per CPT’s introductory language, the retrograde part means a wire passes through a non-occluded artery and its collateral channels to cross the occlusion from the distal cap.
- Global period: 000, per the 2026 Medicare Physician Fee Schedule (MPFS).
What Changed in 2026
The American College of Cardiology (ACC) and the Society for Cardiovascular Angiography and Interventions (SCAI) both flag the same restructuring:
- Deleted: the branch add-ons 92921, 92925, 92929, 92934, 92938, and the CTO add-on 92944. The thrombolysis codes 92975 and 92977 were also deleted.
- Revised: base codes now say “and/or its branch(es),” so branch work is built into the base code.
- Revised: 92943 now specifies the antegrade approach.
- Added: 92930 (complex stenting) and 92945.
A second CTO in a different artery is no longer an add-on. It’s another base code with its own vessel modifier.
When to Bill CPT 92945
Bill it only when the record supports all of these:
- A lesion that meets the CPT definition of a chronic total occlusion.
- Actual revascularization, meaning intervention on the lesion and not wiring alone.
- Both antegrade and retrograde approaches, documented.
- A clearly identified vessel.
- Medical necessity for the procedure.
What Counts as a CTO
CPT defines a coronary CTO as an occlusion with no antegrade flow through the true lumen, plus supporting angiographic or clinical features. Examples are bridging collaterals and calcification at the occlusion site, along with no current ST-elevation or Q-wave MI attributable to that lesion.
What Does Not Count
Subtotal occlusions don’t qualify. Neither do occlusions with dye staining that suggests fresh thrombus, or an acute occlusion causing a current MI. That last case belongs with the acute MI code. Our CPT 92941 billing guide covers it.
Understanding the Use of CPT 92945 for Cardiology Billing
PCI coding follows a hierarchy. For a full view of how these rules affect revenue, see our overview of interventional cardiology billing.
- One base code per major artery. Only the highest-level intervention performed on each primary coronary artery and its associated branches should be reported.
- The base code includes the access work. That means vessel access, selective catheterization, crossing the lesion, related imaging supervision and interpretation, and closure.
- Vessel modifiers identify the artery. SCAI’s 2026 selection tool lists LM, LD, LC, RC, and RI.
- A bypass graft counts as its own major artery. A native LAD along with a LIMA-to-LAD graft constitutes two procedures. This is the primary exception to the rule of one base code per artery.
- A donor vessel isn’t a second PCI. Using a collateral donor artery only to pass a retrograde wire isn’t treatment of that artery.
- Add-ons stay separate. IVUS/OCT (92978, 92979), coronary lithotripsy (92972), mechanical thrombectomy (92973), and FFR/iFR (93571, 93572) are reported separately when documented and not bundled by payer edits.
- Diagnostic angiography is conditional. It’s separately reportable only when documentation supports one of CPT’s recognized circumstances, such as no prior study, a changed condition, or inadequate prior visualization, and when the right modifier is attached.
Accurate PCI reporting is usually where medical coding services pay for themselves, because one wrong base code changes the whole claim.
CPT 92945 vs CPT 92943
The payment row surprises many practices. Work RVUs rose from 92943 to 92945, but total RVUs are nearly identical (18.92 for 92945), so the national Medicare physician payment is basically flat between them. Don’t build revenue projections that assume a large bump from the new code. Verify locality-adjusted amounts in the current CMS fee schedule lookup.
Quick rule: if the retrograde route was used to cross or help cross the occlusion, 92945 is the candidate. If everything came from the antegrade side, even with dissection and re-entry, it’s 92943.
Documentation Requirements for CPT 92945
SCAI and MedAxiom-affiliated coding consultants have warned that a bare technique label, such as “CART” or “RWE” with no detail, invites denials and coder uncertainty. The CTO code choice now depends on how the occlusion was crossed, not just that it was a CTO. If a coder has to guess, the claim isn’t ready. Query the physician before submission.
Medical Necessity and ICD-10 Considerations
CTO PCI draws scrutiny because it’s resource-intensive and often elective. A strong record usually shows symptoms despite guideline-directed medical therapy, supporting noninvasive or invasive findings, and a clinical rationale for the target. Payer policies vary widely, so don’t assume one payer’s standard applies to another.
On the diagnosis side, ICD-10-CM has a code for chronic total occlusion of a coronary artery (I25.82). Its coding note directs you to code the underlying coronary atherosclerosis first (I25.1-, I25.7-, or I25.81-), then the CTO code. The diagnosis should support the vessel and lesion treated, not just a generic chest-pain code.
Modifier Usage for CPT 92945
| Modifier | When it applies | Watch-out |
|---|---|---|
| LM, LD, LC, RC, RI | Identify the major coronary artery treated | Required when multiple PCI base codes appear on one claim |
| 59 / XS | Some payers require it to show a distinct service, such as separately reportable diagnostic cath or a distinct structure | Use only when documentation supports it and the payer’s edits call for it |
| 22 | Substantially greater work than typically required | Rarely appropriate; 92945 already reflects complexity. Needs a clear narrative and records |
| 26 | Professional component of a split service | Generally not applicable to a procedure like this; confirm the indicator in the MPFS file |
| 62 / 80 / 82 | Co-surgery or assistant roles | Payability depends on the code’s MPFS indicators and payer policy; check before billing |
Our modifier 26 guide explains why component modifiers matter for diagnostic testing. The same discipline applies here.
Medicare Billing Considerations
- Payment: the 2026 MPFS lists 92945 as active with total RVU 18.92 (work 15.00, practice expense 2.84, malpractice 1.08). At the $33.4009 conversion factor, that’s about $632 nationally before geographic adjustment.
- Facility setting: this is a cath lab procedure, so the facility RVU applies and the physician is paid separately from the hospital or ASC.
- Coverage: for CTO PCI, coverage generally turns on the “reasonable and necessary” standard and your MAC’s policies. I’m not aware of CTO-specific national criteria, so confirm with your MAC.
- Payer lag: MedAxiom’s early-2026 guidance noted that CMS and many payers hadn’t yet published detailed 2026 PCI policies. A claim with a new code can hit edits not yet updated, so monitor your first 92945 claims closely.
Commercial Insurance Considerations
| Area | Medicare | Commercial payers |
|---|---|---|
| Code recognition | Priced on the 2026 MPFS | May need contract and system updates |
| Prior authorization | Generally not required for physician services | Often required; MedAxiom suggests requesting it for both CTO codes so the approach is covered |
| Modifier rules | Follow NCCI and MPFS indicators | May add proprietary bundling edits |
| Medical necessity | MAC policy | Payer clinical policy, which can be stricter |
| Reimbursement | Fee schedule | Contract rates; may not mirror the RVU pattern |
Because commercial rules differ, eligibility and authorization checks before a scheduled CTO attempt save far more time than appeals afterward.
Correct Coding Examples and Practice Scenarios
The scenarios below are illustrative, not drawn from any specific patient or client.
Example 1: Hybrid RCA CTO
The operator tries antegrade wire escalation, fails, then crosses retrograde via a septal collateral and a reverse CART technique. Two drug-eluting stents go into the RCA.
Code: 92945-RC. No separate stent code for that RCA, and no code for the donor-vessel wiring.
Example 2: Hybrid CTO plus a separate lesion
Same case, plus a distinct LAD lesion stented at the same session.
Code: 92945-RC and 92928-LD (or 92930-LD if the LAD work meets that code’s definition).
Example 3: Vague note
The op note says only “CTO PCI via CART, successful.” The coder can’t tell from this whether retrograde crossing actually occurred.
Action: hold the claim and query the physician. Don’t default to 92945 on assumption.
| Situation | Correct | Incorrect |
|---|---|---|
| Hybrid CTO of the RCA | 92945-RC | 92943 + 92944 (deleted) |
| Antegrade-only CTO crossing | 92943 | 92945 |
| CTO in two separate arteries | One base code per artery with vessel modifiers | Treating the second CTO as an add-on |
| STEMI-related occlusion | Acute MI PCI code | 92943/92945 |
For unusual cases, such as a retrograde attempt that doesn’t lead to crossing, the guidance I reviewed doesn’t spell out every variation. Get written direction from the AMA, ACC, or SCAI coding resources, and your payer, before billing.
Common Billing Mistakes and Claim Denials
Typical errors include billing the deleted 92944, using 92945 for antegrade-only work, omitting vessel modifiers, and coding from a vague op note. Others are stacking separate stent or angioplasty codes onto the CTO artery and billing diagnostic angiography without a documented reason.
| Denial reason | Likely cause | Fix |
|---|---|---|
| Invalid or unrecognized code | Payer hasn’t loaded 92945 | Confirm payer update status; appeal with the CPT descriptor and effective date |
| Bundling / NCCI edit | Missing or wrong modifier | Add the vessel modifier, and 59/XS only if supported |
| Medical necessity | Diagnosis doesn’t support CTO PCI | Link I25.82 with the underlying atherosclerosis code; add clinical notes |
| Documentation insufficient | Retrograde work not described | Request an addendum if appropriate and compliant |
| Duplicate / overlapping | Two providers reported the same service | Verify co-surgeon or assistant policies |
Denial patterns repeat, so a structured denial management process matters. Sort by payer and reason, correct what’s fixable, and appeal what isn’t.
Compliance Tips and Audit Readiness
- Code from the signed procedure note, not from a cath lab log or a preference sheet.
- Make sure the note describes what was done, not what is typical for the technique.
- Add late entries only if compliant: dated, signed, and identified as addenda, never rewriting the original.
- Audit a sample of 92943 and 92945 claims each quarter. Compare op notes against the approach billed.
- Track payer-specific rules for 2026 in a shared reference so coders aren’t relying on memory.
An auditor reading a 92945 claim will look for the retrograde narrative first. If it isn’t there, the higher-complexity code is exposed.
How Professional Cardiology Billing Services Help
CTO PCI sits at the intersection of new codes, nuanced documentation, and payer lag, which is difficult for general billing teams to handle. A specialized partner can help in these areas:
- Pre-procedure checks and prior authorization workflow.
- Pre-bill review of PCI documentation against base code and modifier rules.
- Claims scrubbing and claims submission and tracking.
- Line-level payment posting that separates contractual adjustments from real denials.
- Reporting on recurring 92945 and PCI denial reasons.
For a broader view, see cardiology medical billing and invasive cardiology billing. If you want a PCI claim review, you can contact our team.
2026 Billing Updates and Considerations
- 92945 and 92930 are new; six branch add-ons and the thrombolysis codes were deleted.
- CPT added definitions of coronary “lesion” and “segment” and updated the major artery and branch definitions.
- The 2026 work RVUs have changed within the PCI family, so analyze your 2026 remits alongside 2025 instead of presuming trends continue.
- Payer policies and edits were still catching up early in the year. Check current CMS and payer bulletins instead of relying on January information.
Related reading: CPT 92937 for bypass graft PCI.
Key Takeaways
- CPT 92945 is a new 2026 base code, not an add-on.
- It applies only to CTO PCI using combined antegrade and retrograde approaches.
- 92944 is deleted. Additional arteries get their own base code and vessel modifier.
- Medicare payment is roughly equal to 92943, despite higher work RVUs.
- The op note must describe the retrograde crossing, not just name a technique.
- Commercial payers vary, so verify authorization and code recognition first.
Frequently Asked Questions About CPT 92945
What is CPT 92945?
A 2026 code for PCI on a coronary chronic total occlusion using combined antegrade and retrograde approaches.
Is CPT 92945 an add-on code?
No. It’s a primary (base) code. Some online guides still describe it as an add-on, which is incorrect for 2026.
When should it be billed?
When a qualifying CTO is revascularized and the record shows both antegrade and retrograde approaches.
Can I bill it with 92943?
Not for the identical artery. Provide one base code for each main artery. When two distinct arteries possess separate CTOs, each is assigned its corresponding code and vessel modifier.
Does it require a modifier?
The code itself doesn’t carry a mandatory modifier, but vessel modifiers (LM, LD, LC, RC, RI) are needed to identify the artery, particularly with multiple PCI codes.
What documentation is required?
Indication, CTO criteria, vessel, antegrade and retrograde details, interventions, outcome, and justification for any diagnostic angiography.
Is it covered by Medicare?
It’s active on the 2026 MPFS with total RVU 18.92. Coverage depends on medical necessity and MAC policy.
What ICD-10 codes support it?
Typically coronary atherosclerosis (I25.1-, I25.7-, or I25.81-) plus I25.82 for the CTO, in that order. Confirm against your payer’s policy.
Can I report a stent separately in the same artery?
No. Stenting, atherectomy, and angioplasty are bundled into the CTO code for that artery.
What causes denials?
Unrecognized codes, missing modifiers, weak documentation of the retrograde approach, and necessity gaps.
How do commercial payers treat it?
Policies vary. Many require prior authorization, and some haven’t updated systems for new codes immediately.
How can billing teams reduce denials?
Verify authorization early, review op notes before billing, track denial reasons by payer, and keep a current 2026 PCI reference.
Conclusion
CPT 92945 gives hybrid CTO procedures their own code, but it rewards precise documentation and punishes assumptions. Treat it as a base code, tie it to the correct vessel, and make sure the note proves the retrograde work. Practices that review their first 92945 claims closely, rather than waiting for denials to surface, will protect both revenue and compliance. If you’d like specialist help, Cardiology Billing Services works with interventional practices on PCI coding, claims, and denials.
