Bariatric Surgery and Procedures - (0051) — MM 0051 | CIGNA Coverage Update

Cigna modified MM 0051 for bariatric surgery and procedures, effective February 14, 2026. Here's what billing teams need to do.

Cigna Healthcare updated its bariatric surgery coverage policy under MM 0051, reshuffling how 39 CPT codes and two HCPCS codes are classified across four distinct coverage tiers. The change draws sharper lines between what's medically necessary, what's experimental, and what Cigna will simply not pay for — including explicit Not Medically Necessary designations for neurostimulation codes like 0908T, 64553, and 64568. If your practice bills any bariatric procedure to Cigna patients, this update touches your charge capture, your prior authorization workflow, and your denial defense posture.

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Quick-Reference Table

Field	Detail Copy
Payer	Cigna Healthcare
Policy	Bariatric Surgery and Procedures
Policy Code	MM 0051
Change Type	Modified
Effective Date	February 14, 2026
Impact Level	High
Specialties Affected	General surgery, bariatric surgery, gastroenterology, metabolic medicine, revenue cycle
Key Action	Audit your charge capture and prior auth workflows for all bariatric CPT/HCPCS codes before billing against the February 14, 2026 effective date

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Cigna Bariatric Surgery Coverage Criteria and Medical Necessity Requirements 2026

The Cigna bariatric surgery coverage policy under MM 0051 covers a wide range of surgical procedures for obesity and morbid obesity — but only when specific medical necessity criteria are met. Cigna does not publish its full clinical criteria in the code-level data alone, so your team needs to pull the complete MM 0051 document to confirm the exact BMI thresholds, comorbidity requirements, and documented conservative treatment history Cigna demands before approving these procedures.

What we do know from the policy structure: the bulk of covered procedures — from CPT 43644 (laparoscopic Roux-en-Y gastric bypass) to CPT 43775 (sleeve gastrectomy) to CPT 43889 (endoscopic sleeve gastroplasty) — are classified as "Medically Necessary when criteria in the applicable policy are met." That phrase is doing a lot of work. It means prior authorization is not optional — it's the mechanism Cigna uses to enforce those criteria before reimbursement.

If you're billing CPT 43846 or 43847 for open gastric bypass with short or long limb reconstruction, those same criteria apply. Revision procedures — including CPT 43848, 43860, 43865, 43886, and 43888 — also carry a Medically Necessary designation with criteria gating. Don't assume a revision gets waved through because the original procedure was approved. Cigna treats revisions as their own medical necessity determination.

Two codes deserve special attention for billing teams: CPT 43889 (transoral endoscopic sleeve gastroplasty, or ESG) is listed as Medically Necessary when criteria are met. That's a meaningful signal — ESG has historically been in experimental territory at many payers. Cigna's Medically Necessary designation here is worth noting when building your prior auth documentation.

Prior authorization requirements for bariatric surgery under Cigna plans are well-established, but this policy update gives you a reason to re-confirm the specific documentation Cigna expects for each procedure type — especially revisions and ESG.

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Cigna Bariatric Surgery Exclusions and Non-Covered Indications

This is where the policy gets firm — and where your claim denial risk is highest.

Neurostimulation for Obesity: Not Medically Necessary

Cigna draws a hard line on neurostimulation as an obesity treatment. Five codes carry an explicit Not Medically Necessary designation for obesity treatment:

If a provider on your team is billing any of these for weight management, stop. Cigna will deny these claims. There's no criteria pathway that gets these covered for obesity under MM 0051.

Intragastric Balloon Procedures: Experimental

Cigna classifies intragastric balloon procedures as Experimental/Investigational/Unproven. That designation applies to:

Unlisted codes 43289, 43499, and 44238 also carry the Experimental designation when used in this context.

Experimental designations mean no reimbursement under standard Cigna plans. Some plans have exceptions for clinical trials — but that requires specific plan-level verification. Don't assume.

Liver Procedures in Conjunction with Bariatric Surgery: Not Medically Necessary

CPT 47379 (unlisted laparoscopic liver procedure) is listed as Not Medically Necessary when performed in conjunction with bariatric surgery. This is a specific combination denial. If your surgeons are billing incidental liver procedures alongside bariatric cases, Cigna will not pay for 47379 in that context.

Gastrectomy Codes Misused for Bariatric Reporting: Not Medically Necessary

Three partial gastrectomy codes are explicitly called out as Not Medically Necessary when used to report bariatric procedures:

#	Excluded Procedure Copy
1	43631 — Gastrectomy, partial, distal; with gastroduodenostomy
2	43632 — Gastrectomy, partial, distal; with gastrojejunostomy
3	43634 — Gastrectomy, partial, distal; with formation of intestinal pouch

This is a coding accuracy issue as much as a coverage issue. These codes exist for oncologic or ulcer-related gastrectomies. Using them to report bariatric surgery triggers a Not Medically Necessary denial. Use the correct bariatric-specific codes — 43633 is in the Medically Necessary group and is the appropriate code for partial distal gastrectomy with Roux-en-Y reconstruction in the bariatric context.

Integral Procedure Designations

Two codes are classified as "integral to the primary bariatric procedure":

#	Excluded Procedure Copy
1	CPT 43235 (diagnostic EGD) — considered integral when performed as part of the primary bariatric procedure
2	CPT 43281 (laparoscopic paraesophageal hernia repair with fundoplasty) — considered integral when simple suture repair is performed without mesh

Don't bill these separately when they're performed as part of the bariatric case. Cigna considers them bundled. Separate billing triggers a denial and flags your claims for audit.

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Coverage Indications at a Glance

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Cigna Bariatric Surgery Billing Guidelines and Action Items 2026

These steps are based directly on what MM 0051 tells us. Execute before billing against the February 14, 2026 effective date.

Copy Action Items

If your practice has a high volume of Cigna bariatric claims — or if any of these code categories represent significant revenue — talk to your compliance officer before the February 14, 2026 effective date. The Not Medically Necessary designations and the bundling rules carry real financial and audit risk.

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CPT, HCPCS, and ICD-10 Codes for Bariatric Surgery Under MM 0051

Medically Necessary CPT Codes (When Selection Criteria Are Met)

Integral (Bundled) CPT Codes — Do Not Bill Separately

Code	Type	Description	Bundling Rule Copy
43235	CPT	EGD, flexible, transoral; diagnostic, including specimen collection	Integral to primary bariatric procedure
43281	CPT	Laparoscopy, surgical; repair of paraesophageal hernia with fundoplasty	Integral when simple suture repair without mesh

Not Medically Necessary CPT Codes

Experimental/Investigational/Unproven CPT Codes

Experimental/Investigational/Unproven HCPCS Codes

Code	Type	Description Copy
C9784	HCPCS	Gastric restrictive procedure, endoscopic sleeve gastroplasty, with EGD and intraluminal tube insertion
C9785	HCPCS	Endoscopic outlet reduction, gastric pouch application, with endoscopy and intraluminal tube insertion

No ICD-10-CM codes are listed in the MM 0051 policy data. Verify diagnosis code requirements directly in the full Cigna policy document.

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