Thoracoscopic Sympathectomy — CPB 0310 | AETNA Coverage Update

Aetna modified CPB 0310 for thoracoscopic sympathectomy, effective September 26, 2025. Here's what billing teams need to do.

Aetna, a CVS Health company, updated its thoracoscopic sympathectomy coverage policy under CPB 0310 in the Aetna Clinical Policy Bulletins system. The revision affects CPT 32664—the primary surgical code for thoracoscopic sympathectomy—along with a cluster of related cardiac ablation codes (93650–93657), iontophoresis code 97033, and HCPCS J0585 and J0587 for botulinum toxin. If your practice bills for cardiothoracic surgery, pain management, or hyperhidrosis treatment, this update directly affects your 2025 claim submissions.

Quick-Reference Table

Aetna Thoracoscopic Sympathectomy Coverage Criteria and Medical Necessity Requirements 2025

CPB 0310 Aetna establishes medical necessity for thoracoscopic sympathectomy under nine distinct indications. Most of these—causalgia, Raynaud's disease, shoulder-hand syndrome, vascular occlusive disease, and visceral pain—carry straightforward coverage status. Meet the diagnosis, document it properly, and you have a viable claim.

The cardiac indications are where this gets more demanding. For catecholaminergic polymorphic ventricular tachycardia (CPVT), Aetna requires that the patient remain symptomatic despite maximal medical therapy. That phrase needs to appear in your documentation—not implied, not summarized. Written out.

For long QT syndrome (ICD-10 I45.81), the bar is even higher. The patient must have failed medical therapy and have frequent ICD shocks despite medications. This is a last-resort indication. Your operative notes and pre-authorization records need to show both failure conditions clearly.

VT/VF storm (ICD-10 I47.20–I47.29, I49.01) has a three-part failure requirement before CPT 32664 is covered. Beta blockers, other antiarrhythmic medications, and catheter ablation (CPT 93650–93657) must each be documented as ineffective, not tolerated, or not clinically possible. If you skip documenting any of these three, expect a claim denial.

The hyperhidrosis pathway is the most criteria-dense in this coverage policy. For intractable axillary or palmar primary hyperhidrosis (ICD-10 L74.510–L74.52), Aetna requires all four of the following:

All four. Not three of four. All four. Build a checklist into your pre-authorization workflow before submitting any hyperhidrosis case under this policy.

Prior authorization for CPT 32664 is standard for elective surgical procedures under most Aetna commercial plans. Confirm prior auth requirements with the specific plan before scheduling. Reimbursement exposure on a denied sympathectomy claim is significant—don't assume prior auth is covered by a general surgical auth.

Aetna Thoracoscopic Sympathectomy Exclusions and Non-Covered Indications

CPB 0310 does not list formal "experimental or investigational" designations for specific indications in this revision. The policy is structured around covered indications with required criteria—if an indication isn't on the list, it isn't covered.

The practical exclusion risk sits with hyperhidrosis claims that don't meet all four criteria. Aetna's billing guidelines are explicit: partial documentation isn't sufficient. A patient who failed iontophoresis and antiperspirants but never tried pharmacotherapy does not meet criteria if sweating is episodic. That's a denial waiting to happen.

Similarly, submitting CPT 32664 for VT/VF storm without catheter ablation documentation—even if ablation wasn't attempted because it wasn't feasible—requires a clinical note explaining why. "Not possible" is a covered reason, but it must be documented.

Coverage Indications at a Glance

Aetna Thoracoscopic Sympathectomy Billing Guidelines and Action Items 2025

1. Audit all pending CPT 32664 cases against the September 26, 2025 effective date.
Any claim not yet submitted gets evaluated under the updated policy. Pull your work-in-progress queue now and check each case against the specific indication criteria above.

2. Build documentation checklists for your two highest-risk pathways: hyperhidrosis and cardiac arrhythmia.
For hyperhidrosis, the four-criteria checklist is non-negotiable. For cardiac cases, map each case to the specific failure documentation required—maximal medical therapy for CPVT, failed therapy plus frequent ICD shocks for long QT, and three-modality failure for VT/VF storm.

3. Update your charge capture to pair CPT 32664 with the correct ICD-10 codes.
The ICD-10 list under CPB 0310 is specific. Causalgia requires laterality codes (G56.40, G56.41, or G56.42 for upper limb; G57.70, G57.71, or G57.72 for lower limb). Ventricular tachycardia spans I47.20 through I47.29 with granular subcategories. Map these now before claims go out.

4. Confirm prior authorization requirements for each Aetna plan type before scheduling.
CPT 32664 is a surgical procedure with significant reimbursement at stake. Some Aetna commercial plans handle prior auth differently from Aetna Medicare Advantage products. Don't assume one plan's auth process applies across the board.

5. For hyperhidrosis cases: document the botulinum toxin substitution correctly.
If your patient has predominantly axillary hyperhidrosis and received botulinum toxin (billed as J0585 or J0587) instead of iontophoresis (CPT 97033), the policy allows this as a substitution. Make sure the clinical record reflects the axillary-predominant nature of the condition—and that the substitution rationale is clear.

6. Do not bill CPT 64804 (cervicothoracic sympathectomy) as an alternative to 32664.
CPT 64804 appears in the policy as a related code, not a covered alternative. These are different procedures. Submitting 64804 expecting sympathectomy coverage under CPB 0310 will result in a claim denial.

7. If VT/VF storm cases involve catheter ablation, link CPT 93650–93657 to the record.
These intracardiac catheter ablation codes appear in the policy as related procedures. Your documentation of prior catheter ablation—or clinical justification for why it wasn't performed—directly supports medical necessity for CPT 32664 in VT/VF storm cases.

If your case mix includes a high volume of cardiac sympathectomy cases or hyperhidrosis surgery, loop in your compliance officer before the effective date. The multi-criteria requirements create audit exposure, and the cardiac cases in particular involve overlapping policy territory between electrophysiology and surgical coverage.

CPT, HCPCS, and ICD-10 Codes for Thoracoscopic Sympathectomy Under CPB 0310

Covered CPT Codes (When Selection Criteria Are Met)

Other CPT Codes Related to CPB 0310

These codes appear in the policy as related procedures—prior treatments that must be documented, or procedures clinically connected to sympathectomy coverage decisions.

Other HCPCS Codes Related to CPB 0310

Key ICD-10-CM Diagnosis Codes