Cardiac Catheter Ablation — CPB 0165 | AETNA Coverage Update

Aetna, a CVS Health company, modified CPB 0165 governing cardiac catheter ablation coverage policy, effective September 26, 2025. Here's what billing teams need to know.

Aetna updated CPB 0165 in the Aetna cardiac catheter ablation coverage policy, touching 18 CPT codes and two HCPCS codes across a wide range of arrhythmia indications. The codes at the center of this update include the core ablation procedure codes (93653, 93654, 93655, 93656, 93657) and the emerging radiation-based ablation codes (0745T, 0746T, 0747T), plus 44 ICD-10-CM diagnosis codes that define covered indications. If your practice handles cardiac electrophysiology billing, this policy affects your charge capture, your prior authorization workflow, and your claim denial exposure — starting now.

Quick-Reference Table

Aetna Cardiac Catheter Ablation Coverage Criteria and Medical Necessity Requirements 2025

Aetna considers cardiac catheter ablation procedures with electrophysiological studies medically necessary for a defined list of arrhythmias. The word "any" matters here — Aetna frames this as an inclusive list, meaning coverage turns on matching the right diagnosis code to the right procedure, not on satisfying multiple simultaneous conditions.

The covered arrhythmia indications map directly to the ICD-10-CM codes in CPB 0165. Atrial fibrillation (I48.0 through I48.19 for paroxysmal and persistent AF, I48.20–I48.21 for chronic AF), atrial flutter (I48.3, I48.4, I48.92), and Wolff-Parkinson-White syndrome (I45.6) are all covered when paired with the appropriate ablation CPT. Ventricular arrhythmias — including paroxysmal ventricular tachycardia (I47.20, I47.21, I47.29) and ventricular fibrillation (I49.01) — are also on the covered list.

CPT 93656 covers comprehensive electrophysiologic evaluation with pulmonary vein isolation for atrial fibrillation. CPT 93657 covers additional linear or focal ablation of the left or right atrium for AF treatment. These two codes together handle most AF ablation billing, and both require solid ICD-10 pairing to survive a medical necessity review.

CPT 93653 and 93654 cover comprehensive EP evaluation with ablation for supraventricular tachycardia and ventricular tachycardia, respectively. Add-on code 93655 covers ablation of a discrete mechanism distinct from the primary arrhythmia — bill it only when a second, separate mechanism is treated in the same session. Add-on code +93613 covers 3D intracardiac mapping to guide radiofrequency ablation.

The AV node ablation code — CPT 93650 — covers intracardiac catheter ablation of AV node function for rate control. Aetna covers this when documented medical necessity supports it, typically in patients with refractory atrial fibrillation who can't tolerate or haven't responded to rate-control medications.

Operative ablation codes (33250, 33251, 33254, 33256, +33257, +33259, 33261) are covered when selection criteria are met. These typically come into play during concurrent cardiac surgical procedures rather than standalone EP lab cases. If your cardiovascular surgery team bills these, verify the ICD-10 pairing against the CPB 0165 list before submitting.

Prior authorization requirements are not explicitly detailed in this policy summary. That said, cardiac ablation procedures at this complexity level almost always require prior auth under commercial Aetna plans. Confirm PA requirements with the specific plan before scheduling — don't assume a covered indication means no PA needed.

Aetna Cardiac Catheter Ablation Exclusions and Non-Covered Indications

CPT 93583 — percutaneous transcatheter septal reduction therapy (alcohol septal ablation) — is explicitly not covered for indications listed in CPB 0165. This code targets hypertrophic obstructive cardiomyopathy (ICD-10 I42.1), and Aetna separates it out as a distinct non-covered indication under this policy.

The emerging radiation-based ablation codes — 0745T, 0746T, and 0747T — fall under the "Cardio-neuroablation and sinus node sparing hybrid ablation" group. These codes cover noninvasive arrhythmia localization, multidimensional mapping, and radiation therapy delivery for arrhythmia. The grouping label in the policy data signals that Aetna is tracking these as a distinct technology category. Until Aetna publishes explicit medical necessity criteria for 0745T–0747T, treat them as high-denial-risk codes and review each claim with your compliance officer before billing.

The policy also references cardio-neuroablation separately. That's a catheter-based technique targeting ganglionated plexi to modulate autonomic tone. Coverage for this approach under CPB 0165 is not clearly established, and billing under general ablation codes without specific criteria matching is a claim denial waiting to happen.

Coverage Indications at a Glance

Aetna Cardiac Catheter Ablation Billing Guidelines and Action Items 2025

1. Audit your ICD-10 pairing for every ablation CPT before September 26, 2025.
The 44 ICD-10 codes in CPB 0165 define what Aetna considers covered. A claim with CPT 93656 and an ICD-10 that doesn't appear on that list will deny on medical necessity grounds. Pull a 90-day lookback on your AF ablation claims and check each ICD-10 against the policy list now.

2. Flag CPT 0745T, 0746T, and 0747T as requires-review before billing.
These radiation-based ablation codes are included in CPB 0165 under a separate technology category, but the policy doesn't lay out clear medical necessity criteria for them yet. Build a review checkpoint into your charge capture workflow for these three codes. Loop in your compliance officer before the first claim goes out.

3. Remove CPT 93583 from any cardiac ablation order sets that route to Aetna.
Alcohol septal ablation is not covered under CPB 0165. If your charge capture system links 93583 to I42.1 (obstructive hypertrophic cardiomyopathy) under an Aetna payer flag, that linkage will generate a denial. Clean it up before the effective date of September 26, 2025.

4. Confirm prior authorization requirements for 93656 and 93657 with each Aetna plan.
These are your highest-volume AF ablation codes and the most likely to carry a PA requirement. Don't rely on CPB 0165 alone — call the plan or check the portal for PA requirements. A covered indication without completed prior auth is still a denied claim.

5. Verify add-on code 93655 documentation before billing.
CPT 93655 covers ablation of a distinct second arrhythmia mechanism in the same session. Aetna will scrutinize these claims. Your electrophysiology notes need to clearly document two separate mechanisms — not just two ablation lesions. Brief your EP physicians on this documentation standard now.

6. Check HCPCS codes C1732 and C1886 against your implant log billing.
C1732 (3D electrophysiology mapping catheter) and C1886 (extravascular tissue ablation catheter) are listed as related HCPCS codes under CPB 0165. These typically route through facility billing, but confirm your hospital or ASC is capturing them correctly and pairing them to the right ablation procedure.

7. Update your denial management queue to flag CPB 0165 as the basis for any cardiac ablation denials.
When an Aetna ablation claim denies on medical necessity grounds after September 26, 2025, you need to know it's being reviewed under the updated CPB 0165 — not an older version. Make sure your denial tracking system captures the policy code and version date.

CPT, HCPCS, and ICD-10 Codes for Cardiac Catheter Ablation Under CPB 0165

Covered CPT Codes (When Selection Criteria Are Met)

Cardio-Neuroablation and Sinus Node Sparing Hybrid Ablation Codes

Not Covered Under CPB 0165

Key ICD-10-CM Diagnosis Codes