What Is CPT 92945?

The 92945 CPT code description rests on CPT's own definition of a CTO. As MedAxiom's 2026 PCI briefing summarizes it, a CTO means no antegrade flow through the true lumen, plus supporting angiographic and clinical features such as bridging collaterals, calcification at the occlusion, and no current ST-elevation or Q-wave MI attributable to the target. Subtotal occlusions, and occlusions with dye staining that suggests fresh thrombus, don't qualify (MedAxiom).

The "retrograde" part has a specific meaning. A wire travels through a non-occluded artery and its collaterals to reach the occlusion from the distal cap, in addition to the antegrade attempt from the front.

For diagnosis coding, the same briefing says to code coronary atherosclerosis first (I25.1-, I25.7-, I25.81-) and the CTO diagnosis second. That second code is I25.82 in ICD-10-CM, so confirm it against your current code book.

Why 92945 Exists in the 2026 PCI Update

Before 2026, CTO PCI had one base code (92943) and an add-on for additional vessels (92944). Whether the operator crossed by simple wire escalation or spent four hours building a retrograde channel, the claim looked identical. The 2026 revision splits that:

• 92943 is revised to describe the antegrade approach.
• 92945 is new for combined antegrade and retrograde.
• 92944 was deleted along with the other branch add-ons (92921, 92925, 92929, 92934, 92938). Base codes now say "branch(es)" instead.
• 92930 arrived for complex stenting, and CPT added formal definitions of "lesion" and "segment."

The RUC also reviewed the family. MedAxiom's table of final CY 2026 work RVUs shows 92943 rising from 12.31 to 13.69 and 92945 debuting at 15.00. Why does that matter for your practice? Because the new code rewards documentation of technique, and the old habit of writing "CTO PCI performed" now leaves money, or compliance, on the table.

How CTO PCI Is Billed: The Hierarchy Behind It

PCI codes follow a progressive hierarchy. The more intensive service includes the less intensive one, and you report one base code per major coronary artery and its branches. The CPT guidelines build in access, selective catheterization, lesion crossing, related imaging, and closure, and CMS's NCCI policy manual likewise treats catheterization, dye injection, and fluoroscopic guidance as part of the intervention.

Two consequences follow:

• Stenting, atherectomy, and angioplasty inside a CTO don't generate extra codes. They're already part of 92943 or 92945.
• Each bypass graft counts as its own major artery. A native LAD plus a LIMA-to-LAD graft is two interventions.
• A donor vessel wired only to reach the distal cap is part of how the CTO was crossed. Whether it also received its own revascularization is a coding question the note must answer explicitly.

92945 vs 92943 vs 92944

For the 92945 vs 92943 billing difference, the test is simple: was the retrograde route actually used to cross the occlusion? And for 92945 vs 92944, the answer is that 92944 no longer exists. A claim with a 2026 date of service can't carry it. Dates of service before January 1, 2026 still follow the old code set.

Never report 92943 and 92945 together for the same CTO. They're alternatives in the same hierarchy.

When to Bill CPT 92945

Bill it when the record supports all of the following:

• A lesion that meets CPT's CTO definition.
• A documented antegrade attempt and a documented retrograde route through collaterals.
• Revascularization completed with any combination of balloon, atherectomy, or stent.
• An identified vessel, branch, or graft.

If only antegrade techniques were used, even sophisticated ones like subintimal tracking and reentry, the supported code is 92943. If the operator started antegrade and converted to retrograde, the note should say when and why.

Failed or abandoned attempts raise separate questions about modifiers and payer policy. Get a written answer from your major payers before those cases land in your queue.

How to Bill CPT 92945

1. Confirm the occlusion meets the CTO definition.
2. Read the procedure note for the approach actually used, not the template language.
3. Select 92943 or 92945, never both.
4. Report one base code per major artery, with the appropriate artery modifier.
5. Add diagnostic angiography only if its criteria are met, with the correct modifier.
6. Review add-on codes for physiology, imaging, or mechanical thrombectomy against CPT parentheticals.
7. Link ICD-10 codes: atherosclerosis first, then I25.82.
8. Check prior authorization requirements. MedAxiom suggests requesting authorization for both CTO codes so the approach is covered up front.

92945 Documentation Requirements

Medical Necessity

Payers seek to understand the rationale for attempting a CTO: indications remaining despite medical treatment, evidence of objective ischemia or viability when the policy requires it, and the justification for selecting revascularization. Requirements differ by Medicare Administrative Contractor and by commercial plan, so pull the specific LCD or medical policy rather than relying on memory.

Modifier Usage

Two-operator CTO cases deserve a payer conversation. Don't assume a co-surgery modifier is accepted for PCI codes.

Medicare Billing Considerations vs. Commercial Insurance

On reimbursement: one published breakdown of the CMS 2026 RVU file lists 92945 at 15.00 work RVUs and 18.92 total RVUs. At the $33.4009 non-QP conversion factor, that works out to roughly $632 nationally before geographic adjustment (fastrvu). Medtronic's 2026 coronary reimbursement guide shows a similar figure. Treat both as estimates, and confirm in CMS's Physician Fee Schedule Look-Up Tool for your locality. QP conversion factors differ, and facility payments are separate from professional payment. Never model revenue from a blog number alone, including this one.

Common Billing Mistakes and Denials

Examples of Correct Coding

Think about a standard group practice: the cath lab template automatically sets to "retrograde approach utilized" regardless of whether it was used or not. A coder trusting the template bills 92945 on a straightforward antegrade case, and an audit later exposes the mismatch. The reverse also happens, where a true combined case gets billed as 92943 because the physician wrote only "CTO crossed." Both errors share one root: the narrative and the code were never reconciled.

Coding Tips for Better Reimbursement

• Ask physicians to name collaterals and crossing strategy in plain language.
• Build a pre-bill review for every CTO case.
• Retire 92944 from charge masters now.
• Track 92943 vs 92945 mix by operator to spot template drift.
• Keep payer-specific CTO policy notes in one shared place.

Compliance Checklist

• CTO criteria documented
• Approach matches the code selected
• One base code per major artery
• Artery modifiers present
• Diagnostic cath justified or omitted
• ICD-10 sequencing correct
• Authorization confirmed
• DOS matches the 2026 code set

How Professional Cardiology Billing Services Help

CTO claims are low in volume and high in value, which is exactly why a single coding slip hurts. A dedicated interventional cardiology billing team reviews approach documentation before the claim leaves, while medical coding services can audit templates for the drift described above.

Upstream, eligibility and authorization checks are part of cardiology medical billing. Downstream, claims submission and tracking, denial management, and accurate payment posting show whether a payer is underpaying a new code. Practices that want the full picture can look at revenue cycle management for cardiology. Related reading: the guides to CPT 92941 and CPT 92937. If you'd like a second set of eyes on your CTO claims, you can contact the team.

Future Billing Updates for 2026

Payers and CMS keep publishing guidance as 2026 progresses. Watch contractor bulletins, annual fee schedule rulemaking, and AMA code-cycle changes, and re-verify RVUs each year.

Key Takeaways

• 92945 means CTO PCI with combined antegrade and retrograde approaches.
• 92943 is antegrade-only. 92944 no longer exists.
• One base code per major artery.
• Write the approach in narrative form.
• Verify payment against the official fee schedule.

Frequently Asked Questions

Conclusion