TL;DR: The Centers for Medicare & Medicaid Services modified NCD 120 governing transmyocardial revascularization (TMR) coverage, with an effective date of March 7, 2026. Here's what billing teams need to know before submitting claims.
CMS updated its TMR coverage policy under NCD 120 in its Medicare system. This is a late-resort surgical procedure using a laser to bore channels through the heart muscle. No specific CPT or HCPCS codes are listed in the policy document — but the coverage criteria are detailed, and if your team handles cardiac surgery billing, the medical necessity requirements here are non-negotiable.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Transmyocardial Revascularization (TMR) — NCD 120 |
| Policy Code | NCD 120 Medicare |
| Change Type | Modified |
| Effective Date | 2026-03-07 |
| Impact Level | High |
| Specialties Affected | Cardiac Surgery, Cardiology, Inpatient Hospital Billing, Physician Billing |
| Key Action | Audit your TMR claims against the updated patient selection criteria and facility requirements before March 7, 2026 |
CMS Transmyocardial Revascularization Coverage Criteria and Medical Necessity Requirements 2026
CMS covers TMR as a last-resort intervention — and the policy makes that restriction explicit. This is not a first-line cardiac procedure. It applies only when standard revascularization options have already failed or been ruled out.
To meet medical necessity under this CMS coverage policy, a patient must have severe angina classified as Canadian Cardiovascular Society (CCS) Class III or Class IV. That applies to both stable and unstable angina. The angina must be refractory — meaning drug therapy has been tried at maximum tolerated or maximum safe dosages, and it hasn't worked.
The angina symptoms must also come from areas of the heart that can't be treated with percutaneous transluminal coronary angioplasty, stenting, coronary atherectomy, or coronary bypass. If a patient is a candidate for any of those, TMR isn't covered. Period.
Three additional patient selection criteria apply:
| # | Covered Indication |
|---|---|
| 1 | Ejection fraction of 25% or greater. Document this in the chart before billing. A fraction below 25% disqualifies the patient from coverage. |
| 2 | Viable ischemic myocardium demonstrated by diagnostic study. The viability must be confirmed and documented — not assumed. The ischemic area must also be incapable of revascularization by direct coronary intervention. |
| 3 | Stabilized acute conditions. Patients must be stabilized, or maximum efforts must have been made to stabilize, any acute conditions including severe ventricular arrhythmias, decompensated congestive heart failure, or acute myocardial infarction. |
These aren't soft guidelines. They're the coverage floor. A claim without documentation hitting every one of these points is a claim denial waiting to happen.
CMS also restricts coverage to the FDA-approved use of the specific laser used in the procedure. If the laser isn't FDA-cleared for this indication, coverage doesn't apply. Confirm FDA approval status for your equipment before billing.
The policy doesn't explicitly call out prior authorization requirements for TMR. But given the complexity of the selection criteria and the high reimbursement exposure on inpatient cardiac procedures, check with your Medicare Administrative Contractor (MAC) before assuming prior auth isn't needed. Some MACs issue local coverage determinations (LCDs) that layer on top of national coverage policy — and regional requirements vary.
CMS TMR Exclusions and Non-Covered Indications
CMS is clear that TMR doesn't extend life. The procedure is not proven to affect the underlying cause of angina or improve life expectancy. If a claim is being submitted with the expectation that payers will treat this as a curative intervention, expect pushback.
TMR coverage is also off the table when:
| # | Excluded Procedure |
|---|---|
| 1 | The patient's angina can be addressed by any form of direct coronary revascularization — including angioplasty, stenting, atherectomy, or bypass surgery |
| 2 | The laser used is not FDA-approved for this specific use |
| 3 | The performing physician hasn't been properly trained in TMR |
| 4 | The facility lacks a dedicated cardiac care unit with the required diagnostic and support services |
| 5 | Ancillary personnel — nurses, OR staff, and technicians — aren't documented as trained in the procedure and equipment |
That last point is a documentation issue, not just a clinical one. If your facility can't show that all personnel were trained, CMS has grounds to deny the claim. Build that documentation into your pre-procedure checklist now.
Transmyocardial revascularization billing requires facility-level compliance too. This isn't just a physician credentialing issue. The hospital or surgical center must maintain laser safety standards and have the full infrastructure for cardiac care. A solo cardiac surgeon with credentials isn't enough if the facility doesn't meet these requirements.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| CCS Class III–IV angina, refractory to max-dose drug therapy, not amenable to coronary revascularization | Covered | Policy lists no specific codes | Ejection fraction ≥25% required; ischemia must be confirmed by diagnostic study |
| TMR for angina amenable to PTCA, stenting, atherectomy, or bypass | Not Covered | — | Direct revascularization options must be exhausted or ruled out first |
| TMR using non-FDA-approved laser for this indication | Not Covered | — | FDA approval status of laser device must be confirmed |
| TMR at facilities lacking dedicated cardiac care units | Not Covered | — | Facility infrastructure and laser safety standards are a coverage condition |
| TMR by providers without documented training (physician and ancillary staff) | Not Covered | — | All personnel must be documented as trained; this is a billing-level requirement |
| TMR for increased life expectancy or to treat underlying CAD cause | Not Covered | — | Covered only for symptom relief and reduction in hospitalizations |
| Unstabilized acute MI, decompensated CHF, or severe ventricular arrhythmias at time of procedure | Not Covered | — | Stabilization (or documented max effort to stabilize) required before proceeding |
CMS Transmyocardial Revascularization Billing Guidelines and Action Items 2026
| # | Action Item |
|---|---|
| 1 | Audit your patient selection documentation before March 7, 2026. Pull every scheduled or anticipated TMR case and confirm the chart includes CCS Class III or IV angina classification, proof of maximum-dose drug therapy failure, and evidence that direct revascularization was evaluated and ruled out. If any of those elements are missing, the claim is at risk. |
| 2 | Confirm ejection fraction is documented at 25% or higher. This is a hard coverage floor. Get the diagnostic study in the record and make sure the value is clearly stated. "Approximately 25%" won't cut it under scrutiny. Get the number. |
| 3 | Verify FDA approval status for your laser device. Coverage is limited to lasers approved by the FDA for this specific use. Contact your equipment vendor if you're not certain. Don't assume FDA clearance for one cardiac application extends to TMR. |
| 4 | Document facility compliance with cardiac care unit and laser safety requirements. Work with your compliance officer to confirm your facility meets the structural requirements under NCD 120. This includes dedicated cardiac care infrastructure and conformance to laser safety standards. If you're not sure whether your facility qualifies, talk to your compliance officer before the effective date. |
| 5 | Document training for every ancillary staff member involved in TMR cases. CMS requires documented proof that all nurses, OR personnel, and technicians are trained in both the procedure and the equipment. Make this a standard part of your pre-procedure record. A claim denial tied to missing staff training documentation is entirely preventable. |
| 6 | Check with your MAC for any LCD overlays. NCD 120 sets the national floor for TMR coverage policy. Your MAC may have issued a local coverage determination with additional requirements or documentation standards. Pull the current LCD from your MAC's website and compare it against your current billing guidelines before March 7, 2026. |
| 7 | Update your internal coding and billing guidelines to reflect the NCD 120 criteria. Since the policy lists no specific CPT or HCPCS codes in this version, your coding team needs to match the procedure documentation to the correct surgical codes manually. Confirm with your coding team which CPT codes your facility uses for laser TMR and make sure your internal billing guidelines map those codes to the NCD 120 medical necessity criteria. If your reimbursement is at risk due to code ambiguity, involve your billing consultant. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Transmyocardial Revascularization Under NCD 120
The policy document for NCD 120 does not list specific CPT, HCPCS, or ICD-10 codes. This is notable — and it creates a real documentation burden for your billing team.
What This Means for TMR Billing
Your coding team must independently identify and apply the correct CPT codes for transmyocardial revascularization based on the procedure documentation. The absence of a code list in the policy doesn't mean any code flies — it means your team carries the full responsibility of matching documentation to the correct surgical CPT codes and tying those to the NCD 120 medical necessity criteria.
If your coders are unsure which CPT codes map to TMR procedures at your facility, escalate this to your billing consultant or coding compliance team before the March 7, 2026 effective date. Submitting claims under the wrong code — even with solid clinical documentation — creates reimbursement delays and potential claim denial exposure.
A Note on ICD-10-CM Diagnosis Codes
Given the strict patient selection criteria in NCD 120, your ICD-10 diagnosis coding matters. The primary diagnosis should reflect severe angina with appropriate specificity. CCS Class III or IV angina, ischemic heart disease, and refractory angina all have ICD-10-CM representations — make sure your coders are applying the most specific code supported by the documentation, not a generic chest pain code.
Again, this policy does not list specific diagnosis codes. Work with your clinical documentation improvement (CDI) team to confirm the diagnosis coding reflects the criteria CMS requires for coverage.
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