Cigna modified MM 0469 covering atrial fibrillation nonpharmacological treatments, effective November 15, 2025. Here's what billing teams need to know.
Cigna Healthcare updated coverage policy MM 0469 on November 15, 2025, covering catheter ablation, surgical maze procedures, and left atrial appendage (LAA) closure for atrial fibrillation. The update affects 10 CPT codes and one HCPCS code — including CPT 33340 for percutaneous LAA closure, CPT 33258 for concomitant operative ablation, and several codes now explicitly labeled experimental or not medically necessary. If your practice bills for AF ablation or LAA procedures, audit your charge capture before November 15, 2025.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Cigna Healthcare |
| Policy | Atrial Fibrillation: Nonpharmacological Treatments |
| Policy Code | MM 0469 |
| Change Type | Modified |
| Effective Date | November 15, 2025 |
| Impact Level | High |
| Specialties Affected | Cardiology, Cardiac Surgery, Electrophysiology, Cardiovascular Surgery |
| Key Action | Review charge capture for CPT 33267, 33269, 33254, 33255, 33265, 33266, and 93799 — all carry denial risk under updated criteria |
Cigna Atrial Fibrillation Coverage Criteria and Medical Necessity Requirements 2025
The Cigna atrial fibrillation coverage policy under MM 0469 in the Cigna system draws a sharp line between what's covered, what's experimental, and what's flat-out not medically necessary. The distinctions matter for reimbursement. Getting the code wrong — or billing a standalone procedure where concomitant use is required — is a fast path to claim denial.
CPT 33258 (operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedures) is covered when medical necessity criteria in the applicable coverage policy are met. The operative word is "at the time of other cardiac procedures." This is a concomitant-use code. Billing it as a standalone procedure will likely trigger a denial.
CPT 33340 (percutaneous transcatheter closure of the left atrial appendage with endocardial implant) is also covered when medical necessity criteria are met. This covers the Watchman-type device implant. HCPCS C1889 (implantable/insertable device, not otherwise classified) is listed as experimental/investigational in the context of this policy — so verify how your facility is coding the device component versus the procedure.
Prior authorization almost certainly applies to CPT 33340 given the complexity and cost of LAA closure. Confirm prior auth requirements for your specific Cigna plan contracts before scheduling.
Cigna Atrial Fibrillation Exclusions and Non-Covered Indications
This is where the policy gets blunt — and where your billing team needs to pay close attention.
CPT 33267 and 33269 — open and thoracoscopic left atrial appendage exclusion — are explicitly considered not medically necessary when used to report standalone LAA closure. These are surgical exclusion codes (stapling, oversewing, ligation). Cigna is drawing a clear line: standalone LAA exclusion surgery doesn't meet medical necessity under this policy.
CPT 93799 (unlisted cardiovascular service or procedure) is considered not medically necessary when used to report Vein of Marshall procedures. If your electrophysiology team is performing VOM ethanol infusion and using 93799, those claims will be denied under this policy.
The maze procedure codes are a harder hit. CPT 33254 (limited operative maze), 33255 (extensive maze without cardiopulmonary bypass), 33265 (endoscopic limited maze), and 33266 (endoscopic extensive maze) are all labeled experimental/investigational/unproven. That designation applies to standalone maze procedures — not the concomitant ablation covered under 33258. The distinction is critical.
CPT 33999 (unlisted cardiac surgery procedure) and HCPCS C1889 also carry the experimental/investigational designation under this policy. If you're using either code as a workaround for procedures that hit these exclusions, expect denials.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Operative tissue ablation performed with other cardiac surgery | Covered — Medical Necessity Criteria Apply | CPT 33258 | Concomitant use required; standalone likely denied |
| Percutaneous transcatheter LAA closure (Watchman-type) | Covered — Medical Necessity Criteria Apply | CPT 33340 | Confirm prior authorization before procedure |
| Standalone surgical or thoracoscopic LAA exclusion | Not Medically Necessary | CPT 33267, CPT 33269 | Cigna explicitly excludes standalone LAA exclusion surgery |
| Vein of Marshall procedure (unlisted cardiovascular) | Not Medically Necessary | CPT 93799 | Specific denial designation for VOM use |
| Standalone limited or extensive maze procedure (operative) | Experimental/Investigational/Unproven | CPT 33254, CPT 33255 | Not covered as standalone procedures |
| Endoscopic maze procedure (limited or extensive) | Experimental/Investigational/Unproven | CPT 33265, CPT 33266 | Both endoscopic maze codes excluded |
| Unlisted cardiac surgery (misc. AF procedures) | Experimental/Investigational/Unproven | CPT 33999 | High denial risk; document necessity if billing |
| Implantable/insertable device (unlisted, for AF) | Experimental/Investigational/Unproven | HCPCS C1889 | Device component billing carries denial risk |
Cigna Atrial Fibrillation Billing Guidelines and Action Items 2025
The effective date of November 15, 2025 is your deadline. Here's what to do before then.
| # | Action Item |
|---|---|
| 1 | Audit your charge capture for CPT 33267 and 33269. If your cardiac surgery team bills standalone LAA exclusion procedures to Cigna, those claims will deny under the updated coverage policy. Review the last 90 days of claims for these codes and assess your volume. Flag any scheduled procedures and discuss alternate treatment planning or documentation strategies with your clinical and compliance teams. |
| 2 | Confirm concomitant documentation for CPT 33258. This code is only covered when performed with other cardiac surgery. Your operative reports must clearly document the primary cardiac procedure and the ablation as concurrent. If operative notes don't reflect this, your reimbursement is at risk even on covered claims. |
| 3 | Verify prior authorization requirements for CPT 33340. Percutaneous LAA closure is covered under MM 0469, but Cigna almost certainly requires prior auth for this procedure. Check your plan-level contracts and confirm the prior auth pathway before November 15, 2025. |
| 4 | Stop using CPT 93799 for Vein of Marshall procedures. Cigna's MM 0469 Cigna system policy explicitly calls this out. If your electrophysiology billing team is using 93799 for VOM ethanol infusion, those claims will be denied. Work with your electrophysiology team and coding staff to identify an accurate code or document the clinical distinction clearly. If you're not sure how to code VOM procedures under this change, talk to your billing consultant before the effective date. |
| 5 | Review any HCPCS C1889 usage tied to AF procedures. The experimental designation for C1889 in this context means device claims for unlisted implantables in AF procedures are likely headed for denial. Make sure device billing is appropriately separated from the procedure or find a more specific HCPCS code. |
| 6 | Brief your cardiac surgery and electrophysiology coders specifically on the maze code exclusions. CPT 33254, 33255, 33265, and 33266 are experimental/investigational for standalone maze. That doesn't mean maze is never billed — CPT 33258 covers the concomitant version. The difference between 33258 and 33254/33255 is one of the higher-stakes distinctions in AF ablation billing. |
| 7 | Pull a 90-day lookback for denied AF ablation claims. If any of these codes have been hitting the wall already, the effective date of this update may confirm what Cigna has been applying operationally. Use that data to calibrate your pre-authorization and charge capture workflow going forward. |
| 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 Atrial Fibrillation Nonpharmacological Treatments Under MM 0469
Covered CPT Codes (When Medical Necessity Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 33258 | CPT | Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedures |
| 33340 | CPT | Percutaneous transcatheter closure of the left atrial appendage with endocardial implant |
Not Medically Necessary Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| 33267 | CPT | Exclusion of left atrial appendage, open, any method (eg, excision, isolation via stapling, oversewing) | Not medically necessary for standalone LAA closure |
| 33269 | CPT | Exclusion of left atrial appendage, thoracoscopic, any method (eg, excision, isolation via stapling) | Not medically necessary for standalone LAA closure |
| 93799 | CPT | Unlisted cardiovascular service or procedure | Not medically necessary when used to report Vein of Marshall procedures |
Experimental / Investigational / Unproven Codes
| Code | Type | Description |
|---|---|---|
| 33254 | CPT | Operative tissue ablation and reconstruction of atria, limited (eg, modified maze procedure) |
| 33255 | CPT | Operative tissue ablation and reconstruction of atria, extensive (eg, maze procedure); without cardiopulmonary bypass |
| 33265 | CPT | Endoscopy, surgical; operative tissue ablation and reconstruction of atria, limited (eg, modified maze) |
| 33266 | CPT | Endoscopy, surgical; operative tissue ablation and reconstruction of atria, extensive (eg, maze procedure) |
| 33999 | CPT | Unlisted procedure, cardiac surgery |
| C1889 | HCPCS | Implantable/insertable device, not otherwise classified |
No ICD-10-CM diagnosis codes are specified in the MM 0469 policy data. Use the standard AF diagnosis codes appropriate for your clinical documentation — but coverage determination under this policy is driven by procedure code and clinical criteria, not diagnosis code alone.
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