Gastroesophageal Reflux Disease (GERD) — CPB 0213 | AETNA Coverage Update

Aetna modified CPB 0213 for GERD surgical procedures, effective September 26, 2025. Here's what billing teams need to know.

Aetna, a CVS Health company updated its GERD surgical coverage policy under CPB 0213, affecting CPT codes 43280, 43325, 43327, 43328, and 43846, among others. This coverage policy governs when open fundoplication, laparoscopic fundoplication, and Roux-en-Y gastric bypass are considered medically necessary for GERD treatment. If your practice bills for GI surgery, foregut procedures, or bariatric surgery under Aetna plans, this update changes what documentation you need to avoid a claim denial.

Quick-Reference Table

Aetna GERD Surgical Coverage Criteria and Medical Necessity Requirements 2025

CPB 0213 Aetna system defines surgical treatment for GERD as medically necessary only when specific, documented clinical conditions are met. This is not a blanket surgical benefit. Every claim for laparoscopic or open fundoplication under CPT 43280, 43325, 43327, or 43328 must be supported by objective testing and a documented failure of medical management.

Aetna requires two things to be true before surgical coverage kicks in. First, reflux must be documented. That means either abnormal 24-hour pH monitoring results or endoscopically proven esophagitis in the chart. A clinical note saying "patient reports reflux symptoms" is not enough. The documentation has to show objective evidence.

Second, at least one of six specific clinical scenarios must apply:

The real issue here is documentation specificity. Aetna is looking for Los Angeles class grades, measured hernia diameters, and specific PPI dosing duration — not just a surgeon's clinical impression. If your pre-authorization package doesn't include endoscopy notes with LA classification or a pH monitoring report, expect a prior authorization denial.

Roux-en-Y gastric bypass (CPT 43846) is also covered for GERD, but only when the member separately meets obesity surgery criteria under CPB 0157. You cannot use GERD as the standalone indication for CPT 43846 unless obesity criteria are also satisfied.

Aetna GERD Surgical Exclusions and Non-Covered Indications

Several CPT codes in CPB 0213 are explicitly not covered or considered experimental for GERD treatment. This is where a lot of claim denial risk lives.

Electrical stimulation of the lower esophageal sphincter is not covered under this policy. CPT 43284 (laparoscopic placement of a sphincter augmentation device) and CPT 43285 (removal of the device) fall into this non-covered bucket. So does CPT 43210 (EGD with esophagogastric fundoplasty via transoral route) and CPT 43257 (EGD with thermal energy delivery to the lower esophageal sphincter).

Partial gastrectomy codes — CPT 43631, 43632, 43633, and 43634 — are grouped under the non-covered/experimental designation for GERD indications. CPT 43847 (gastric bypass with small intestine reconstruction to limit absorption) is explicitly not covered for non-obese patients.

CPAP (CPT 94660) and osteopathic manipulative treatment (CPT 98925–98929) appear in the policy code set but are not covered for GERD treatment under this CPB.

If your team has been billing any of these codes for GERD indications under Aetna, stop and audit those claims before the effective date of September 26, 2025.

Coverage Indications at a Glance

Aetna GERD Surgical Billing Guidelines and Action Items 2025

1. Audit your prior authorization packets before September 26, 2025.
Every prior auth submission for CPT 43280, 43325, 43327, or 43328 must include objective reflux documentation — either a 24-hour pH monitoring report with abnormal values flagged or an endoscopy report confirming esophagitis. A clinical note alone will not satisfy the requirement.

2. Train your pre-auth team on the six coverage criteria.
These are not interchangeable. Each criterion has specific documentation requirements. "Failed PPI therapy" requires at least one month of twice-daily dosing, not once-daily. Make a checklist and attach it to your Aetna authorization workflow.

3. For severe esophagitis cases, get the LA classification in the endoscopy report.
Aetna defines severe esophagitis as Los Angeles class C or D. If the endoscopy report says "severe esophagitis" without a class designation, that is a documentation gap. Contact the performing provider and get the report amended before submitting.

4. For hiatal hernia cases, confirm the measured diameter is in the endoscopy note.
The threshold is greater than 2 cm, measured endoscopically. "Large hiatal hernia" in a clinical note is not enough. The measurement must appear in the endoscopy report. If it doesn't, you are billing on shaky ground.

5. Stop billing CPT 43284, 43285, 43210, and 43257 for Aetna GERD patients.
These codes are in the experimental/not covered group under CPB 0213. If you've been submitting these for GERD reimbursement under Aetna plans, pull those claims, review your denials history, and correct your charge capture going forward.

6. For bariatric-GERD overlap cases, verify CPB 0157 criteria are met independently.
CPT 43846 requires obesity surgery eligibility under CPB 0157. GERD alone does not justify bariatric bypass reimbursement. Document both indications separately in the authorization request.

7. Check your ICD-10 coding against the full K21 code range.
This policy covers GERD diagnosis codes K21.0 through K21.9. Use the most specific subcategory available based on the clinical documentation. Pairing K21.0 (GERD with esophagitis) with LA class documentation is your strongest combination for severe esophagitis claims.

If your practice has a high volume of Aetna GERD surgical cases and you're unsure how these criteria apply to your specific patient mix, talk to your compliance officer before the September 26 effective date. The documentation requirements here are specific enough that a single missing element can flip a covered claim into a denial.

CPT, HCPCS, and ICD-10 Codes for GERD Surgery Under CPB 0213

Covered CPT Codes (When Selection Criteria Are Met)

Not Covered / Experimental Codes

HCPCS Codes

Key ICD-10-CM Diagnosis Codes