CMS modified NCD 120 for Transmyocardial Revascularization (TMR), effective March 7, 2026. Here's what changes for billing teams.
The Centers for Medicare & Medicaid Services updated its coverage policy for TMR under National Coverage Determination NCD 120 in the Medicare system. This is a surgical laser procedure used as a last resort for severe angina in patients who can't get relief from standard interventions like angioplasty, stenting, or coronary bypass. The policy does not list specific CPT or HCPCS codes — but the coverage criteria are detailed, strict, and carry real claim denial risk if your documentation doesn't align precisely.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Transmyocardial Revascularization (TMR) |
| Policy Code | NCD 120 |
| Change Type | Modified |
| Effective Date | March 7, 2026 |
| Impact Level | High |
| Specialties Affected | Cardiac Surgery, Cardiology, Inpatient Hospital Facilities |
| Key Action | Audit your TMR documentation now against the updated selection criteria — ejection fraction, ischemic viability, and prior therapy failure — before submitting any claims under this policy |
CMS Transmyocardial Revascularization Coverage Criteria and Medical Necessity Requirements 2026
The CMS TMR coverage policy under NCD 120 covers TMR as a last resort only. That framing matters. CMS is explicit: this procedure is not a first-line or second-line option. It's for patients who have exhausted everything else.
To meet medical necessity under this coverage policy, a patient must have severe angina classified as Canadian Cardiovascular Society (CCS) Class III or Class IV. Both stable and unstable angina qualify, but the angina must be refractory to standard medical therapy. That means drug therapy at maximum tolerated or maximum safe dosages — not just a trial run.
The angina must also be caused by areas of the myocardium that cannot be reached by standard revascularization. Specifically, CMS requires that the affected areas are not amenable to percutaneous transluminal coronary angioplasty, stenting, coronary atherectomy, or coronary bypass. If any of those options remain viable, TMR doesn't meet medical necessity under NCD 120.
Patient Selection Criteria
Three additional patient-level criteria must all be met:
Ejection fraction: The patient must have an ejection fraction of 25% or greater. Document this with imaging. If it's below 25%, the procedure is not covered.
Viable ischemic myocardium: There must be areas of viable ischemic myocardium demonstrated by diagnostic study — not just clinically suspected. The diagnostic evidence must be in the record.
Stabilized acute conditions: The patient must be stabilized, or the clinical team must have made maximal efforts to stabilize, acute conditions like severe ventricular arrhythmias, decompensated congestive heart failure, or acute myocardial infarction before the procedure.
All three criteria are required. One missing piece in your documentation is enough to trigger a claim denial.
Physician and Facility Requirements
This is where a lot of billing teams get surprised. CMS requires not just that the operating physician is trained in TMR — but that all ancillary personnel are trained too. That includes nurses, operating room staff, and technicians. Your documentation must reflect this.
Facilities must have dedicated cardiac care units with the diagnostic and support services necessary to care for TMR patients. Laser safety standards must also be met. These aren't suggestions — they're coverage conditions.
Before submitting claims for TMR reimbursement, confirm your facility's documentation includes proof of personnel training and laser safety compliance. CMS will look for it on audit.
FDA Approval Requirement
CMS limits coverage to lasers that have received Food and Drug Administration (FDA) approval for the specific purpose of performing TMR. Using an off-label or unapproved laser device — even one used commonly elsewhere — removes the procedure from coverage entirely. Confirm FDA approval status for your specific laser system before the effective date of March 7, 2026.
Prior Authorization
NCD 120 does not specify a prior authorization requirement for TMR. That said, this procedure is high-dollar, high-scrutiny, and subject to post-payment audit. Don't treat the absence of a prior auth requirement as low risk. The selection criteria function as a de facto pre-authorization checklist — and your documentation needs to support every box.
CMS TMR Exclusions and Non-Covered Indications
CMS is clear that TMR is not covered as a tool to extend life expectancy. The policy states directly that the procedure does not provide increased life expectancy and is not proven to affect the underlying cause of angina. If your documentation frames the clinical rationale around survival benefit or disease modification, you're framing it wrong — and a reviewer will flag it.
Coverage is also off the table when the angina is amenable to direct revascularization. If the patient can receive angioplasty, stenting, atherectomy, or bypass — even if TMR is being considered alongside those options — CMS will not cover TMR.
Patients with ejection fractions below 25% are excluded. No exceptions appear in the policy. Patients with uncontrolled or unstabilized acute cardiac conditions are also excluded until those conditions are addressed.
Finally, procedures performed with lasers that don't carry FDA approval for TMR are not covered. This applies regardless of the physician's training or the facility's credentials.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Severe angina (CCS Class III or IV), refractory to max-dose drug therapy, not amenable to revascularization | Covered | No specific CPT/HCPCS listed in NCD 120 | All three patient selection criteria must be documented |
| Ejection fraction ≥ 25% | Required for Coverage | — | Diagnostic imaging required to document |
| Viable ischemic myocardium confirmed by diagnostic study | Required for Coverage | — | Clinical suspicion alone is not sufficient |
| Stabilized acute conditions (arrhythmia, CHF, AMI) | Required for Coverage | — | Or documented maximal stabilization efforts |
| Angina amenable to PTCA, stenting, atherectomy, or bypass | Not Covered | — | TMR is only covered when direct revascularization is not an option |
| Ejection fraction < 25% | Not Covered | — | Hard exclusion, no exceptions in NCD 120 |
| Procedures using non-FDA-approved lasers | Not Covered | — | FDA approval for TMR-specific use is required |
| TMR for life expectancy improvement | Not Covered | — | Policy explicitly states no survival benefit |
| Unstabilized acute ventricular arrhythmias, decompensated CHF, or acute MI | Not Covered (until stabilized) | — | Procedure must wait until stabilization is achieved |
CMS Transmyocardial Revascularization Billing Guidelines and Action Items 2026
The updated NCD 120 coverage policy is effective March 7, 2026. Here's what your billing team needs to do now.
1. Audit your current TMR documentation templates.
Pull the templates your clinical team uses for TMR cases. Check them against every criterion in NCD 120: CCS Class III or IV classification, failed drug therapy at maximum dose, non-amenability to direct revascularization, ejection fraction ≥ 25%, diagnostic confirmation of viable ischemic myocardium, and stabilization documentation. If any of those fields are missing or vague, fix the template before March 7, 2026.
2. Confirm FDA approval for your laser system.
This is not a box most billing teams check — but it's a hard coverage condition. Contact your equipment vendor and get written confirmation that your laser system holds FDA approval specifically for TMR. File that confirmation in your compliance records.
3. Document personnel training for every TMR case.
CMS requires documented training for all ancillary personnel — not just the surgeon. Build this into your pre-procedure checklist. The record should show that nurses, OR staff, and technicians are trained in the procedure and the laser equipment.
4. Verify facility qualifications before billing.
Your facility must have a dedicated cardiac care unit with the diagnostic and support services CMS requires. If you're billing for TMR reimbursement at a facility that doesn't meet this standard, those claims will not hold up on audit. Loop in your compliance officer now if you're unsure about your facility's status.
5. Train your coding team on the medical necessity narrative.
TMR billing guidelines require that the claim narrative — and supporting documentation — frames the procedure as symptomatic relief, not a curative treatment. CMS explicitly states TMR does not improve life expectancy. If your physicians are writing notes that claim survival benefit, that's a documentation problem. Work with your medical director to align clinical language with what the coverage policy actually covers.
6. Review any pending TMR claims for the updated criteria.
If you have TMR cases in process or queued for billing, hold them until you've confirmed the documentation meets the March 7, 2026 criteria. A claim denial on a high-dollar cardiac surgery case is expensive to recover from — and preventable with a pre-submission review.
| 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
A Note on Codes
NCD 120 for Transmyocardial Revascularization does not list specific CPT, HCPCS, or ICD-10 codes in the policy document. This is not unusual for older NCDs that predate the current coding infrastructure — but it does create a real challenge for TMR billing teams.
Your billing team should work with your coding staff or a billing consultant to identify the appropriate procedure codes for TMR based on current CPT guidelines. Do not assume a code is correct without that verification. If you're billing TMR and you're unsure which codes apply to your specific case mix, talk to your compliance officer before submitting claims under the updated policy.
The absence of listed codes in the policy also means there's no code-level guidance on what Medicare Administrative Contractors may be looking for at the local level. Check with your MAC for any local coverage determination (LCD) activity that may supplement NCD 120 in your region. Some MACs issue LCDs that add code-level specificity to NCD policies — and those can include documentation requirements that go beyond what the NCD itself specifies.
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