Cardiac Ablation of Abnormal Electrical Rhythms - (0529) — MM 0529 | CIGNA Coverage Update

TL;DR: Cigna Healthcare modified MM 0529 for cardiac ablation of abnormal electrical rhythms, effective February 14, 2026. Five CPT codes — 33254, 33255, 33265, 33266, and 93799 — are classified as Experimental/Investigational/Unproven under this coverage policy. Here's what billing teams need to know before submitting another claim.

Cigna Healthcare updated its cardiac ablation coverage policy (MM 0529) covering transcatheter ablation for supraventricular tachycardia (SVT), premature ventricular contractions (PVC), and ventricular arrhythmias. The revision draws a sharp line between covered ablation procedures and those Cigna considers experimental — and your charge capture and denial management workflows need to reflect that line now.

Quick-Reference Table

Cigna Cardiac Ablation Coverage Criteria and Medical Necessity Requirements 2026

The Cigna cardiac ablation coverage policy under MM 0529 covers two distinct patient populations. Transcatheter ablation for SVT is covered in both children and adults. Transcatheter ablation for PVC and other ventricular arrhythmias is covered only in adults aged 18 and older.

That age cutoff for ventricular arrhythmias is not a minor footnote. If your practice treats pediatric patients with PVC or ventricular arrhythmias, Cigna does not cover transcatheter ablation for those cases under this policy. Submit a claim for that indication in a patient under 18, and you're looking at a claim denial.

Medical necessity documentation for cardiac ablation billing should clearly reflect the arrhythmia type and the patient's age. Those two variables drive coverage status under MM 0529 — not the procedure itself. Your clinical documentation needs to support both.

Atrial fibrillation is explicitly out of scope here. Cigna's MM 0529 coverage policy does not address transcatheter ablation for afib. That falls under a separate Cigna Medical Coverage Policy: Nonpharmacological Treatments for Atrial Fibrillation. If your team bills ablation for afib under this policy code, you're billing under the wrong policy.

MM 0529 does not specify prior authorization requirements in the data available for this revision. That doesn't mean prior authorization isn't required for these procedures under your specific Cigna contract or plan. Check your participating provider agreement and Cigna's portal before scheduling high-cost ablation procedures — especially for pediatric SVT cases, where reimbursement exposure is significant.

Cigna Cardiac Ablation Exclusions and Non-Covered Indications

This is where the real billing risk lives. Cigna classifies five CPT codes as Experimental/Investigational/Unproven under MM 0529. That designation means Cigna will not reimburse these procedures. Period.

The five codes are: CPT 33254 (limited operative atrial ablation), CPT 33255 (extensive operative atrial ablation without cardiopulmonary bypass), CPT 33265 (endoscopic limited operative atrial ablation), CPT 33266 (endoscopic extensive operative atrial ablation), and CPT 93799 (unlisted cardiovascular service or procedure).

The pattern here is worth noticing. CPT codes 33254, 33255, 33265, and 33266 all describe operative and endoscopic tissue ablation and reconstruction of the atria — the maze procedure and modified maze procedure family. These are open or minimally invasive surgical approaches, not catheter-based. Cigna's position is that these surgical ablation techniques don't meet the evidence standard for coverage.

CPT 93799 is the wildcard. It's an unlisted code, which means some practices use it when a more specific code doesn't exist or when a payer hasn't yet assigned a permanent code to a new procedure. Cigna classifying 93799 as Experimental/Investigational/Unproven in this context signals that unlisted cardiovascular procedures in the ablation space won't get coverage either. Don't use 93799 as a workaround when one of the specific ablation codes doesn't apply — it won't work with Cigna.

This also explains the policy's medical necessity language. Cigna is drawing a distinction between transcatheter ablation (covered for appropriate indications) and operative/surgical ablation approaches (not covered). The transcatheter route meets Cigna's evidence threshold. The surgical maze procedure family does not.

Coverage Indications at a Glance

Cigna Cardiac Ablation Billing Guidelines and Action Items 2026

The effective date is February 14, 2026. These actions should already be in motion.

If you're unsure how this policy revision applies to your specific patient mix or contract terms, talk to your compliance officer or billing consultant before the next claim goes out.

CPT, HCPCS, and ICD-10 Codes for Cardiac Ablation Under MM 0529

The five codes listed under MM 0529 are all classified as Experimental/Investigational/Unproven. There are no covered CPT codes enumerated in this specific revision — covered transcatheter ablation procedures are addressed by the policy's medical necessity criteria but are not assigned specific CPT codes in the data available for this update.

Not Covered / Experimental CPT Codes

No HCPCS Level II codes or ICD-10-CM diagnosis codes are listed in the available MM 0529 revision data. The policy does not enumerate ICD-10 codes for covered indications in this version.