TL;DR: Aetna, a CVS Health company, modified CPB 0821 covering transcatheter pulmonary valve implantation under CPT 33477, effective December 10, 2025. Here's what billing teams need to do.
This update to the Aetna transcatheter pulmonary valve implantation coverage policy clarifies three distinct medically necessary indications — and draws a hard line around what it won't cover. If your team bills CPT 33477 for any Aetna members, the criteria in CPB 0821 Aetna system now govern every claim. Valve-in-valve procedures are explicitly experimental. Get your documentation aligned before you submit.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | Transcatheter Pulmonary Valve Implantation |
| Policy Code | CPB 0821 |
| Change Type | Modified |
| Effective Date | December 10, 2025 |
| Impact Level | High |
| Specialties Affected | Interventional Cardiology, Cardiac Surgery, Pediatric Cardiology |
| Key Action | Verify all CPT 33477 claims map to one of three covered indications and include supporting ICD-10 codes before submitting |
Aetna Transcatheter Pulmonary Valve Implantation Coverage Criteria and Medical Necessity Requirements 2025
Aetna's transcatheter pulmonary valve implantation coverage policy under CPB 0821 recognizes three medically necessary indications for CPT 33477. Each one has specific clinical thresholds. Get them wrong and you're looking at a claim denial.
Indication 1: Dysfunctional RVOT conduit — stenosis or regurgitation. Aetna covers transcatheter pulmonary valve implantation when the right ventricular outflow tract (RVOT) conduit has become stenotic or regurgitant. For stenosis, the mean RVOT gradient must be 35 mm Hg or greater. For regurgitation, severity must be moderate or worse. There's also a structural requirement: the original conduit must have been at least 16 mm in diameter when first implanted. That last criterion catches a lot of practices off guard. Miss it in the documentation and you'll lose the claim.
Indication 2: Dysfunctional non-conduit, patch-repaired RVOT. Aetna covers transcatheter pulmonary valve implantation for patients with dysfunctional non-conduit, patch-repaired RVOT. This is a broader population than the conduit group — patients who had patch-based surgical repairs rather than conduit placement. The diameter rule doesn't apply here, but you still need documentation supporting RVOT dysfunction. Your clinical team's notes need to spell that out explicitly.
Indication 3: Pulmonary insufficiency with progressive right ventricular dilation after failed pulmonary valvulectomy. This is the narrowest of the three. Aetna covers transcatheter pulmonary valve implantation for patients with pulmonary insufficiency and progressive right ventricular dilation — but only when they've already failed pulmonary valvulectomy. Document the prior valvulectomy. Document the failure. Document the RV dilation. All three. If the chart doesn't show the valvulectomy attempt and its outcome, the medical necessity argument collapses.
Aetna's coverage policy applies to FDA-approved devices. The Harmony Transcatheter Pulmonary Valve (TPV) System, Melody Transcatheter Pulmonary Valve, and Sapien S3 Valve are all named in the policy. Billing transcatheter pulmonary valve implantation billing with an off-label or non-FDA-approved device is a denial waiting to happen.
Prior authorization is almost certainly required for a procedure of this complexity and cost. The policy doesn't override your Aetna contract's prior auth requirements. Confirm prior authorization requirements for CPT 33477 with Aetna directly for each member's plan before scheduling the procedure. Reimbursement depends on it.
Aetna Transcatheter Pulmonary Valve Implantation Exclusions and Non-Covered Indications
This is where the policy gets expensive if you're not paying attention.
Aetna considers transcatheter pulmonary valve implantation experimental, investigational, or unproven for indications outside the three listed above. The policy calls out one example by name: valve-in-valve implantation for degenerated bioprosthetic valves. Aetna's position is that effectiveness for this use hasn't been established.
That's a direct and explicit exclusion. If your interventional cardiology team is doing valve-in-valve procedures with CPT 33477 and billing Aetna members, you need to stop — or get a firm coverage determination in writing before you proceed. Billing experimental procedures that Aetna has named as unproven isn't just a claim denial risk. It's a compliance issue.
The "other indications" language in the policy is deliberately broad. Any indication not covered by the three criteria above falls into the experimental bucket by default. If a clinical scenario is close but not a clean match, escalate it to your compliance officer before billing.
Coverage Indications at a Glance
| Indication | Coverage Status | Key Clinical Threshold | Relevant Codes |
|---|---|---|---|
| Dysfunctional RVOT conduit — stenosis (mean gradient ≥ 35 mm Hg) with original conduit ≥ 16 mm | Covered | Mean RVOT gradient ≥ 35 mm Hg; original conduit ≥ 16 mm diameter | CPT 33477; T82.857A–T82.857S |
| Dysfunctional RVOT conduit — regurgitation (moderate or greater) with original conduit ≥ 16 mm | Covered | Moderate or greater pulmonary regurgitation; original conduit ≥ 16 mm diameter | CPT 33477; T82.897A–T82.897S |
| Dysfunctional non-conduit, patch-repaired RVOT | Covered | Documented RVOT dysfunction following patch repair | CPT 33477; T82.09XA–T82.09XS |
| Pulmonary insufficiency with progressive RV dilation; failed pulmonary valvulectomy | Covered | Prior valvulectomy failure documented; progressive RV dilation confirmed | CPT 33477; I37.1, I51.7 |
| Valve-in-valve implantation for degenerated bioprosthetic valve | Experimental / Not Covered | Effectiveness not established per Aetna | CPT 33477 (denied) |
| Other indications not listed above | Experimental / Not Covered | Falls outside CPB 0821 covered criteria | CPT 33477 (denied) |
Aetna Transcatheter Pulmonary Valve Implantation Billing Guidelines and Action Items 2025
| # | Action Item |
|---|---|
| 1 | Audit all pending CPT 33477 claims against the three covered indications before December 10, 2025. The effective date is December 10, 2025. Any claim submitted on or after that date must align with the updated CPB 0821 criteria. Pull your open claims now and check each one. |
| 2 | Confirm the original conduit diameter is documented for Indication 1. This is the criterion practices miss most often. If the original conduit was less than 16 mm, the patient doesn't qualify under Indication 1. That fact needs to be retrievable from the surgical history in the chart — not reconstructed later at appeal. |
| 3 | For Indication 3 (pulmonary insufficiency with progressive RV dilation), document the failed valvulectomy explicitly. The prior intervention and its failure must appear in the record. "Patient is not a surgical candidate" is not the same as "patient underwent pulmonary valvulectomy and failed." Your documentation has to match the policy language. |
| 4 | Stop billing CPT 33477 for valve-in-valve procedures on Aetna members without a coverage exception. Aetna explicitly designates valve-in-valve implantation as experimental. If your program performs these procedures, flag Aetna members at scheduling. Get prior authorization discussions started and document every response in writing. If you're uncertain whether your specific scenario qualifies, talk to your compliance officer before the effective date. |
| 5 | Pair CPT 33477 with the correct ICD-10-CM codes from the covered group. Match the clinical indication to its diagnosis code. Stenosis claims need T82.857A–T82.857S. Regurgitation claims need T82.897A–T82.897S. Pulmonary insufficiency with progressive RV dilation maps to I37.1 and I51.7. Mechanical complications of a heart valve prosthesis map to T82.09XA–T82.09XS. A code mismatch between the clinical indication and the ICD-10 is a fast path to denial. |
| 6 | Verify prior authorization requirements for CPT 33477 on each member's Aetna plan. Aetna plan types vary. Commercial, Medicare Advantage, and Exchange products can have different prior auth rules. Don't assume a covered indication means automatic approval. Call Aetna or check the portal before scheduling. |
| 7 | Brief your cardiac surgery and interventional cardiology teams on the valvulectomy failure requirement. Indication 3 involves a specific prior treatment failure. Clinicians need to know that Aetna requires this be documented, not just implied. This is a conversation for your next department billing review — do it before December 10, 2025. |
| 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 Transcatheter Pulmonary Valve Implantation Under CPB 0821
Covered CPT Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 33477 | CPT | Transcatheter pulmonary valve implantation, percutaneous approach, including pre-stenting of the valve delivery site, when performed |
Key ICD-10-CM Diagnosis Codes
| Code | Description |
|---|---|
| I37.1 | Nonrheumatic pulmonary valve insufficiency [pulmonary insufficiency with progressive right ventricular dilation] |
| I51.7 | Cardiomegaly [pulmonary insufficiency with progressive right ventricular dilation] |
| T82.09XA – T82.09XS | Other mechanical complication of heart valve prosthesis |
| T82.857A – T82.857S | Stenosis of cardiac devices, implants and grafts |
| T82.897A – T82.897S | Other specified complication of cardiac devices, implants and grafts [regurgitation] |
A note on ICD-10 code selection: The T82 codes cover a range of episode-of-care suffixes (initial encounter through sequela). Use the suffix appropriate to the claim encounter type. T82.857A is the initial encounter for stenosis. T82.897A is the initial encounter for regurgitation. If you're billing follow-up encounters, move to the correct suffix — billing the wrong suffix is a technical denial that's avoidable.
Get the Full Picture for CPT 33477
Track this policy across versions, search 1,500+ policies by CPT code, and get real-time alerts when any payer changes coverage.