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ModifiedBlue Cross Blue Shield - MassachusettsPolicy 379

Bariatric Surgery and Related Procedures — Coverage Criteria

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Medical policy governing when bariatric surgical procedures and certain related endoscopic or non-surgical obesity treatments are considered medically necessary, investigational, or not medically necessary for Blue Cross Blue Shield Massachusetts commercial members.

Policy Summary

PayerBlue Cross Blue Shield - Massachusetts

PolicyBariatric Surgery and Related Procedures — Coverage Criteria

Policy CodePolicy 379

Change TypeMultiple: added/clarified/updated coverage and investigational statements (including SADI‑S, BEAM, adolescent criteria)

Effective Date

Next Review Date

Key ActionSubmit prior authorization requests via Authorization Manager with facility NPI and servicing surgeon NPI and complete the Surgical Management of Obesity Services prior authorization form.

SourceLink

POLICY UPDATE CHANGES

Policy updated with literature review through October 29, 2025; references added and policy statements revised to move SADI-S to medically necessary from investigational.

Policy clarified to include bariatric endoscopic antral myotomy (BEAM) and additional investigational endoscopic procedures; BEAM added to investigational endoscopic procedures.

New medically necessary statement added for bariatric surgery in adults with Class 2 obesity and at least 1 obesity-related comorbid condition (9/2024).

Bariatric Surgery in Adolescents (ages 12-18) considered medically necessary according to similar weight-based criteria used for adults (5/2024).

Coding information clarified (January 2026 and earlier clarifications noted).

BMI ≥40Class 3 threshold

BMI 35–39.9Class 2 threshold

BMI 30–34.9Class 1 with T2D

Ages 12–18Adolescent eligibility

Preauth required (inpatient)Inpatient auth

Coverage Criteria for Bariatric Procedures

Bariatric Surgery — Class 3 (BMI ≥40)

Covered when ALL of the following are met for adults with Class 3 obesity:

Class 3 adult coverage: Patient is an adult (≥18 years) with BMI ≥ 40 kg/m2; has failed weight loss by conservative measures; is a well-informed and motivated patient with acceptable operative risks; is enrolled in a preoperative and postoperative multidisciplinary program (behavioral health, nutrition, medical management); and the surgeon and institution meet experience/program criteria.BMI ≥ 40 kg/m2

Covered procedures include open or laparoscopic Roux-en-Y gastric bypass, laparoscopic adjustable gastric banding, open or laparoscopic sleeve gastrectomy, biliopancreatic diversion with duodenal switch (DS), and single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S).

Bariatric Surgery — Class 2 (BMI 35–39.9 with comorbidity)

Covered when ALL of the following are met for adults with Class 2 obesity:

Class 2 adult coverage:

Policy Summary

PayerBlue Cross Blue Shield - Massachusetts

PolicyBariatric Surgery and Related Procedures — Coverage Criteria

Policy CodePolicy 379

Change TypeMultiple: added/clarified/updated coverage and investigational statements (including SADI‑S, BEAM, adolescent criteria)

Effective Date

Next Review Date

Key ActionSubmit prior authorization requests via Authorization Manager with facility NPI and servicing surgeon NPI and complete the Surgical Management of Obesity Services prior authorization form.

SourceLink

On This Page

Patient is an adult (≥18 years) with BMI 35–39.9 kg/m2 AND has at least one obesity-related comorbid condition; has failed weight loss by conservative measures; is a well-informed and motivated patient with acceptable operative risks; is enrolled in a pre/post multidisciplinary program; and the surgeon and institution meet experience/program criteria.

BMI 35–39.9 kg/m2 + ≥1 comorbidity

Covered procedures mirror those listed for Class 3 (RYGB, LAGB, SG, BPD/DS, SADI-S).

Bariatric Surgery — Class 1 (BMI 30–34.9 with Type 2 Diabetes)

Covered when ALL of the following are met for adults with Class 1 obesity and type 2 diabetes:

Class 1 with diabetes: Patient is an adult (≥18 years) with BMI 30–34.9 kg/m2 AND has type 2 diabetes; has failed weight loss by conservative measures; meets patient selection criteria and program/surgeon requirements; and is enrolled in multidisciplinary pre/post care.BMI 30–34.9 kg/m2 + type 2 diabetes

Listed covered procedures include biliopancreatic diversion with DS, laparoscopic adjustable gastric banding (LAGB), Roux-en-Y gastric bypass (RYGB), sleeve gastrectomy (SG), and SADI-S. Bariatric surgery is investigational for Class 1 patients without diabetes and for BMI <30 kg/m2.

Revision and Repeat Bariatric Procedures

Revision and repeat procedures

Revision surgery to address perioperative or late complications of a bariatric procedure (e.g., staple line failure, obstruction, stricture, nonabsorption resulting in hypoglycemia or malnutrition, band slippage not correctable by adjustment) is considered MEDICALLY NECESSARY.N/A

Revision is also medically necessary for severe GERD refractory to medical therapy and for pouch dilation when initial procedure produced weight loss and the patient was compliant with nutrition/exercise; documented by upper GI exam or endoscopy.

Repeat surgical procedures (conversion or repeat surgery) for clinically significant weight regain or inadequate weight loss unrelated to a surgical complication are considered MEDICALLY NECESSARY.N/A

Repeat procedures are distinct from revisions for complications; documentation of prior weight loss response and compliance expected.

Concomitant Hiatal Hernia Repair

Concomitant procedures

Hiatal hernia repair concurrent with bariatric surgery: Repair of a preoperatively diagnosed hiatal hernia with indications for surgical repair may be considered MEDICALLY NECESSARY when performed at the time of bariatric surgery.N/A

Repair of a hernia diagnosed intraoperatively or repair of a preoperatively diagnosed hernia without indications for repair is considered INVESTIGATIONAL. Evidence shows hiatal hernia repair during sleeve gastrectomy improves GERD remission and reduces complications when the hernia was diagnosed preoperatively.

Adults with Class 3 Obesity

Covered when evidence supports bariatric surgery for adults with class 3 obesity

Adult Class 3: Adults (≥18 years) with class 3 obesity (BMI >40 kg/m2) are candidates for bariatric surgery—procedures include RYGB, LAGB, SG, BPD/DS, and SADI-S—when selection criteria and conservative-therapy requirements are met.BMI >40 kg/m2

RCTs, observational studies, and systematic reviews demonstrate substantial weight loss and improvements in mortality and comorbidities supporting coverage.

Adults with Class 2 Obesity

Covered when evidence supports bariatric surgery for adults with class 2 obesity

Adult Class 2: Adults (≥18 years) with class 2 obesity (BMI 35–39.9 kg/m2) who have at least one obesity-related comorbidity and who meet selection criteria may be candidates for bariatric surgery (RYGB, LAGB, SG, BPD/DS, SADI-S).BMI 35–39.9 kg/m2

Evidence from RCTs and observational studies shows greater weight loss and improvements in comorbidities compared with nonsurgical therapy.

Adults with Class 1 Obesity and Type 2 Diabetes

Covered when evidence supports surgery for adults with Class 1 obesity and T2D

Class 1 with T2D: Adults with BMI 30–34.9 kg/m2 and type 2 diabetes may be considered for certain bariatric procedures (gastric bypass, sleeve gastrectomy, LAGB, BPD/DS, SADI-S) if they have failed conservative measures and meet selection/program criteria.BMI 30–34.9 kg/m2 + T2D

Systematic reviews of RCTs and observational studies show higher diabetes remission rates and improved HbA1c with surgery versus nonsurgical treatment.

Adults with BMI <35 kg/m2 without Type 2 Diabetes

Not sufficiently supported

BMI <35 without T2D: Adults with BMI <35 kg/m2 who do not have type 2 diabetes: evidence is insufficient to conclude long-term risk–benefit and does not support routine coverage of bariatric surgery.BMI <35 kg/m2 without T2D

Small RCTs and case series report weight loss but long-term net health benefit is not established.

Revision Bariatric Surgery

Covered with criteria

Revision bariatric surgery: Adults requiring revision bariatric surgery for complications or for inadequate weight loss (when clinically indicated) may be covered; evidence from systematic reviews, case series, and registries shows satisfactory weight loss and acceptable safety.Clinical indication for revision

Registry data and retrospective analyses report acceptable outcomes; serious complication rates (eg, 7.2% for conversion to RYGB) have been reported and should be considered in risk assessment.

Adolescents with Obesity

Covered with specialized consideration

Adolescents (generally ages ~12–18) may be considered for bariatric surgery (gastric bypass, LAGB, sleeve gastrectomy) primarily when severe comorbidities are present or BMI >50 kg/m2; evaluation should include developmental, psychosocial assessment, and capacity for informed consent.BMI >50 kg/m2 or severe comorbidities

Evidence shows weight loss and comorbidity reduction similar to adults; most guidelines recommend reserving surgery for severe disease and careful psychosocial assessment.

Preadolescent Children with Obesity

Not covered / insufficient evidence

Preadolescent children (primarily <12 years) lack focused comparative studies; evidence is insufficient to determine net health benefit and does not support routine coverage of bariatric surgery in this age group.Preadolescent age group

Some cohort data include children ages 5–14 with substantial excess weight loss and comorbidity resolution, but comparative trials are lacking.

Covered with criteria / Insufficient evidence groups

Adolescents (ages ~12-18): Bariatric surgery (gastric bypass, LAGB, SG) has sufficient evidence of net health benefit in adolescents, with weight loss and comorbidity reduction similar to adults; recommended to reserve surgery for individuals with severe comorbidities or BMI >50 kg/m2 and consider developmental, psychosocial, and informed consent capacity.BMI >50 kg/m2 or severe comorbidities

Evidence includes RCTs, observational studies, and systematic reviews; expert guidance recommends caution and thorough evaluation.

Preadolescent children (<12): There are no studies focused solely on preadolescent children; cohort data including children younger than 12 report substantial excess weight loss and comorbidity resolution but comparative studies are lacking; evidence is insufficient to determine net health benefit.none

A 2021 cohort included ages 5–14 with durable outcomes but overall evidence insufficient.

Hiatal hernia repair concurrent with bariatric surgery: When a preoperative diagnosis of hiatal hernia is present, repair of the hiatal hernia during sleeve gastrectomy demonstrates better GERD remission and fewer complications compared with SG alone; there is no evidence to support repair when the diagnosis is incidental.Preoperative diagnosis required

Benefit demonstrated in systematic review and cohort/case series; repair without preoperative indication is investigational.

The policy identifies a set of procedures and uses that are considered investigational or not medically necessary, with particular emphasis on endoscopic techniques. Examples specifically listed as investigational include endoscopic sleeve gastroplasty, intragastric balloons, bariatric endoscopic antral myotomy (BEAM), endoscopic gastric suturing (e.g., Apollo OverStitch), aspiration therapy devices, stomaphyx insertion, placement of transpyloric shuttle for bariatric indications, and endoscopically placed duodenojejunal sleeves. In addition, certain surgical variants (for example, vertical-banded gastroplasty and BPD without duodenal switch) and procedures without demonstrated long‑term benefit in specified populations are identified as investigational or excluded from coverage.

Specific procedure codes are listed as investigational in the policy. Investigational CPT codes called out include 0813T, 43290, 43291, 43645, 43842, 43843, 43847, and 43889. An investigational HCPCS code listed is C9785. These codes correspond to various endoscopic and surgical bariatric techniques (for example, intragastric balloon deployment/removal, endoscopic sleeve gastroplasty, and endoscopic outlet reduction) that the policy excludes from coverage as investigational.

Bariatric surgery in preadolescent children is considered investigational. The policy notes there are no studies focused solely on this age group and that available cohort data—including children younger than 12—are insufficient because comparative studies are lacking; therefore the evidence is inadequate to conclude an improvement in net health outcome and routine coverage is not supported.

Endoscopic procedures used as a primary bariatric intervention or for revision purposes are explicitly listed as investigational. The policy enumerates multiple endoscopic techniques (for example, endoscopic gastric suturing, BEAM, aspiration therapy devices, and intragastric balloons) and states these are investigational whether performed as primary procedures or for revision of prior bariatric surgery.

The policy considers bariatric surgery investigational or not sufficiently supported for adults with a BMI < 35 kg/m2 who do not have type 2 diabetes. For adults with Class 1 obesity (BMI 30–34.9 kg/m2) the policy limits coverage to those with type 2 diabetes; when diabetes is absent, surgery is considered investigational. The policy therefore does not support routine coverage for BMI <35 without T2D.

The policy states there are no studies focused solely on preadolescent children and that comparative evidence is lacking. Although cohort data including children younger than 12 report substantial and durable excess weight loss and comorbidity resolution, the absence of comparative trials means the evidence is insufficient to determine an improvement in net health outcome; consequently bariatric surgery for preadolescents is considered investigational.

Coding — CPT, HCPCS, ICD-10

No explicit CPT/ICD codes listed in this sectionmixed

No codes listed

Covered CPT Codes (examples listed)CPTCovered

43644	Laparoscopy, surgical, gastric restrictive procedure; with gastric bypass and Roux-en-Y gastroenterostomy (roux limb 150 cm or less).
43770	Laparoscopy, surgical, gastric restrictive procedure; placement of adjustable gastric restrictive device (eg, gastric band and subcutaneous port components).
43775	Laparoscopy, surgical, gastric restrictive procedure; longitudinal gastrectomy (ie, sleeve gastrectomy).
43845	Gastric restrictive procedure with partial gastrectomy, pylorus-preserving duodenoileostomy and ileoileostomy (50 to 100 cm common channel) to limit absorption (biliopancreatic diversion with duodenal switch).
43846	Gastric restrictive procedure, with gastric bypass for morbid obesity; with short limb (150 cm or less) Roux-en-Y gastroenterostomy.
43848	Revision, open, of gastric restrictive procedure for morbid obesity, other than adjustable gastric restrictive device (separate procedure).

Investigational CPT CodesCPTExperimental

0813T	Esophagogastroduodenoscopy, flexible, transoral, with volume adjustment of intragastric bariatric balloon.
43290	Esophagogastroduodenoscopy, flexible, transoral; with deployment of intragastric bariatric balloon.
43291	Esophagogastroduodenoscopy, flexible, transoral; with removal of intragastric bariatric balloon(s).
43645	Laparoscopy, surgical, gastric restrictive procedure; with gastric bypass and small intestine reconstruction to limit absorption.
43842	Gastric restrictive procedure, without gastric bypass, for morbid obesity; vertical-banded gastroplasty.
43843	Gastric restrictive procedure, without gastric bypass, for morbid obesity; other than vertical-banded gastroplasty.
43847	Gastric restrictive procedure, with gastric bypass for morbid obesity; with small intestine reconstruction to limit absorption.
43889	Gastric restrictive procedure, transoral, endoscopic sleeve gastroplasty (ESG), including argon plasma coagulation, when performed.

Investigational HCPCS CodesHCPCSExperimental

C9785

Endoscopic outlet reduction, gastric pouch application, with endoscopy and intraluminal tube insertion, if performed, including all system and tissue anchoring components.

ICD-10-PCS Procedure CodesICD-10

0DB64Z3	Excision of Stomach, Percutaneous Endoscopic Approach, Vertical.
0D160ZA	Bypass Stomach to Jejunum, Open Approach.
0D160ZB	Bypass Stomach to Ileum, Open Approach.
0D164ZA	Bypass Stomach to Jejunum, Percutaneous Endoscopic Approach.
0D164ZB	Bypass Stomach to Ileum, Percutaneous Endoscopic Approach.
0D190ZB	Bypass Duodenum to Ileum, Open Approach.
0D194ZB	Bypass Duodenum to Ileum, Percutaneous Endoscopic Approach.
0DB60Z3	Excision of Stomach, Open Approach, Vertical.
0DB60ZZ	Excision of Stomach, Open Approach.
0DB80ZZ	Excision of Small Intestine, Open Approach.

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ICD-10 Diagnosis Codes (medically necessary when criteria met)ICD-10Covered

E66.01	Morbid (severe) obesity due to excess calories.
Z68.35	Body mass index (BMI) 35.0-35.9, adult.
Z68.36	Body mass index (BMI) 36.0-36.9, adult.
Z68.37	Body mass index (BMI) 37.0-37.9, adult.
Z68.38	Body mass index (BMI) 38.0-38.9, adult.
Z68.39	Body mass index (BMI) 39.0-39.9, adult.
Z68.41	Body mass index (BMI) 40.0-44.9, adult.
Z68.42	Body mass index (BMI) 45.0-49.9, adult.
Z68.43	BMI 50-59.9 , adult.
Z68.44	Body mass index (BMI) 60.0-69.9, adult.

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inv-26: BMI thresholds and related criteria

Class 3 (most actionable)Adults with BMI ≥ 40 kg/m2 are eligible for bariatric surgery when they have failed conservative measures and meet program/surgeon selection criteria (procedures include RYGB, LAGB, SG, BPD/DS, SADI-S)

Class 2Adults with BMI 35–39.9 kg/m2 plus at least one obesity-related comorbid condition are eligible when conservative measures have failed and selection criteria are met

Class 1 with T2DAdults with BMI 30–34.9 kg/m2 and type 2 diabetes may be eligible for certain bariatric procedures when conservative measures have failed and selection criteria are met

Not supportedBariatric surgery is investigational for Class 1 without diabetes and for BMI <30 kg/m2

inv-27: BMI thresholds for adults

Adults — Class 3Evidence supports bariatric surgery for adults with BMI >40 kg/m2 (substantial weight loss and improved comorbidities)

Adults — Class 2Adults with BMI 35–39.9 kg/m2 may be candidates when one or more obesity-related comorbidities are present

Adults — Class 1 with T2DAdults with BMI 30–34.9 kg/m2 and type 2 diabetes have evidence of benefit for select procedures (improved glycemic outcomes)

Provider Actions, Prior Authorization, and Documentation

Prior Authorization

Prior Authorization Required

Prior authorization is required for all inpatient bariatric surgery services described in this policy. For outpatient surgical services for Commercial Managed Care (HMO and POS) and Commercial PPO members, prior authorization is required; prior authorization is not required for outpatient medical (non‑surgical) services.

Inpatient procedures: precertification/preauthorization IS REQUIRED for all products when performed inpatient.
Commercial Managed Care (HMO and POS), Outpatient: prior authorization is required for surgical services; not required for medical services.
Commercial PPO, Outpatient: prior authorization is required for surgical services; not required for medical services.

Prior Authorization

How to Request Authorization

Providers must submit prior authorization requests using Authorization Manager (available 24/7) for initial authorization requests and to submit required clinical documentation, check case status, and view decision letters. For out‑of‑network providers, requests should be faxed to the number on the form.

Enter the facility NPI/provider ID where services will be performed.
Enter the servicing surgeon's NPI/provider ID (not the billing group).
Use Surgical Management of Obesity Services Preauthorization Request Form (#047) via Authorization Manager.
Out‑of‑network fax: 888‑282‑0780.

Documentation Required

Conservative Therapy Requirement

Conservative (non‑surgical) therapy must have been attempted and failed before bariatric surgery is considered. Documentation should reflect prior diet, exercise, behavioral interventions, and other non‑surgical approaches as determined by the surgeon.

Patient has failed other non‑surgical approaches to long‑term weight loss (diet, exercise, behavioral changes) — duration and specifics are at the surgeon's discretion.
Patient must be enrolled in a program providing pre‑ and post‑operative multidisciplinary care (behavioral health, nutrition, medical management).
BMI and comorbidity thresholds as detailed in Patient Selection Criteria must be met.

Step Therapy

No explicit step therapy requirements are specified in this policy. The policy does not list any step‑therapy mandates prior to surgical authorization.

Policy does not define step therapy or require medications/steps prior to authorization.

Documentation Required

Authorization Submission and Documentation Expectations

Authorization and clinical documentation must meet the medical policy guidelines and the member's contract benefits. Providers should report services using current procedure, diagnosis, and modifier codes. Inclusion of codes in the policy is informational and does not guarantee coverage.

All requests for commercial members must meet medical policy guidelines.
Report services with up‑to‑date CPT/HCPCS/ICD codes and modifiers.
Inclusion of a code in the policy does not imply coverage; verify member contract benefits.

Note

References to Clinical Practice Guidelines

References informing documentation and clinical expectations include clinical practice guidelines and position statements (e.g., COSPONSORED perioperative nutrition and ASMBS/ASGE guidance), and CMS decision memo on bariatric surgery. These should be used to support clinical justification in authorization requests.

Mechanick et al., Clinical Practice Guidelines for Perioperative Nutrition, Metabolic, and Nonsurgical Support (2019).
ASMBS position statement and ASGE/ESGE guideline on bariatric endoscopic therapies.
CMS Decision Memo for Bariatric Surgery for the Treatment of Morbid Obesity (CAG‑00250R).

Denial Risk

Denial Triggers and Risks

Denial risks include requests for investigational procedures or devices not supported by the policy and failure to meet the policy's medical necessity criteria (including lack of documentation of failed conservative therapy or required BMI/comorbidity criteria).

Investigational procedures/devices listed in the policy are subject to denial.
Incomplete documentation of patient selection criteria or conservative therapy may result in denial.

Note

No Authorization Required for Outpatient Medical Services

There are no separate authorization requirements noted for medical (non‑surgical) outpatient care under this policy; authorization focus is on surgical services. Providers should still verify member contract specifics.

Outpatient medical services: prior authorization is not required per policy language for commercial plans.
Verify individual member benefits for any exceptions.

Background and Policy Scope

Bariatric surgery is indicated when conservative measures have failed. The policy frames surgery as a treatment for obesity and obesity-related comorbid conditions after non‑surgical approaches—dietary modification, exercise, and behavioral interventions—have not achieved durable weight loss. Eligible patients should be assessed and treated within comprehensive bariatric programs that provide multidisciplinary preoperative evaluation and postoperative follow‑up to optimize outcomes.

Definitions and Key Terms

inv-45: Examples of weight-related comorbidities

Examples (select list)Asthma; Cardiovascular disease; Type 2 diabetes; Dyslipidemia; GERD; Hypertension; Obstructive sleep apnea; Nonalcoholic fatty liver disease; Osteoarthritis; Polycystic ovarian syndrome; Infertility; Depression; Prediabetes; Stroke; Urinary stress incontinence

inv-46: Class III obesity definition

DefinitionClass III (Class 3) obesity: adult BMI >40 kg/m2 (documented diagnostic codes include Z68.41 and above)

Associated codesICD-10 examples: Z68.41 (BMI 40.0-44.9), Z68.42 (45.0-49.9), Z68.43 (50-59.9), Z68.44 (60.0-69.9), Z68.45 (70 or greater)

Clinical noteCandidates should have failed conservative measures and meet program/surgeon selection criteria to be considered for surgery

inv-47: Class I obesity with T2D definition

Definition (most actionable)Class I obesity with Type 2 Diabetes: adult BMI 30–34.9 kg/m2 plus documented type 2 diabetes; certain bariatric procedures (eg, gastric bypass, SG, LAGB, BPD, SADI-S) may be medically necessary when conservative measures have failed

EvidenceSystematic reviews and RCTs show greater diabetes remission and HbA1c reduction with surgery compared with nonsurgical therapy in this BMI range

LimitationsBariatric surgery is investigational for Class I individuals without diabetes

inv-48: Adolescents — definition and considerations

Age range and criteria (most actionable)Adolescents (generally ages 12–18) may be considered for bariatric surgery when meeting weight-based criteria used for adults, particularly with severe comorbidities or BMI >50 kg/m2; evaluate developmental, psychosocial readiness and informed consent capacity

EvidenceRCTs, observational studies, and systematic reviews report weight loss and comorbidity reduction similar to adults; guidelines recommend reserving surgery for severe disease

Program requirementsCandidates should meet surgical program selection criteria including multidisciplinary pre/post-op care

inv-49: Preadolescent children — definition and insufficiency of evidence

Definition and stance (most actionable)Preadolescent children (primarily <12 years) — evidence is insufficient to determine net health benefit; bariatric surgery is considered investigational/ not established for routine coverage in this group

Evidence notesNo studies focused solely on preadolescents; cohort data including ages 5–14 show substantial weight loss but comparative studies are lacking

Coverage implicationPolicy does not support routine coverage of bariatric surgery for preadolescent children due to insufficient comparative evidence