Procedure prior authorization required

Prior authorization is required for bariatric procedures when coverage exists; requests must reference the applicable CPT/HCPCS code(s) listed in the policy and include supporting clinical documentation that medical necessity criteria are met.

• Prior authorization applies to the covered and investigational procedure codes listed in the policy (see coding tables).
• Authorization requests must include documentation that medical necessity criteria are satisfied (BMI, comorbidities, weight-loss program participation, mental health clearance).

Prior authorization for listed procedure codes

Submit a prior authorization request for any of the bariatric CPT/HCPCS codes enumerated in the policy (including covered, investigational, and unlisted codes referenced for SADI‑S).

• Include the specific CPT/HCPCS code(s) for the planned procedure (examples: 43644, 43645, 43770, 43775, 43845, 43846, 43659, 43999).
• Unlisted procedures (e.g., 43999 for SADI‑S) require prior authorization with supporting operative plan and rationale.

Authorization must reference planned procedural code

When requesting authorization, reference the specific bariatric CPT code for the planned operation; the policy explicitly notes authorization is relevant for listed CPT codes and for the unlisted stomach code 43999 used for SADI‑S.

• Do not substitute an incorrect CPT; use 43999 only when no specific CPT exists (e.g., SADI‑S) and include detailed operative description.
• Prior authorization should identify the exact procedure (open vs laparoscopic; short‑limb vs long‑limb as applicable).

Include BMI and comorbidity documentation

Authorization requests must include objective BMI evidence and documentation of obesity‑related comorbidities aligned with the policy selection criteria (e.g., BMI thresholds and listed comorbid conditions).

• Document measured BMI that meets the policy threshold (e.g., ≥40 kg/m2; 35–39.9 kg/m2 with at least one obesity‑related comorbidity; or 30–34.9 kg/m2 with T2D and inadequate glycemic control).
• Include clinical records demonstrating the specific comorbidity(ies) cited in the policy (e.g., coronary heart disease, uncontrolled hypertension, T2D with HbA1c≥7).

Device‑specific prior authorization considerations

If an implantable or temporary bariatric device is planned, prior authorization must reflect device‑specific labeled indications and limits and include device identity and intended use.

• Confirm and document device brand/model and FDA‑labeled indications (examples: Spatz3, Obalon, ORBERA, AspireAssist, LAP‑BAND, REALIZE) and maximum placement durations as applicable.
• Provide evidence of failure of supervised weight‑loss programs when required by the device labeling.

Evidence referenced for prior authorization

The policy cites the CMS Decision Memo and other guideline and evidence sources; prior authorization determinations are informed by these references but the policy requires clinical documentation per its stated criteria.

• References include CMS Decision Memo (CAG‑00250R) and multiple guideline and evidence citations supporting coverage decisions.
• Use cited guidelines/evidence to support that clinical criteria are met when submitting authorization documentation.

Prior authorization — follow current coding notes

Prior authorization requests should use the medical policy’s current CPT/HCPCS code list; coding updates and additions in the coding section must be used when requesting authorization.

• Verify codes against the policy coding section (new and terminated codes are noted, e.g., addition of 43889; termination of C9784 effective 01/01/26).
• Include any updated or unlisted codes referenced in the policy history when applicable to the planned procedure.

Conservative management documentation (≥3 months)

Document participation in a physician‑administered weight‑reduction program of at least three continuous months within the 12 months before surgery; records must show active participation.

• Include program duration (≥3 continuous months) and evidence of active participation such as weight logs, current dietary program, and physical activity documentation.
• Alternatively, document participation in a structured weight‑loss program (e.g., Weight Watchers, Jenny Craig) supervised by the healthcare provider.

Document failure of conservative therapy

Prior authorization requires documentation that conservative (nonsurgical) weight‑reduction measures were attempted and failed before bariatric surgery is considered.

• Provide records of prior dietary and lifestyle interventions and practitioner review of these attempts.
• For adjustable gastric banding and other procedures, document postoperative compliance history if prior procedures were performed.

Conservative therapy prerequisite

Documented failure of conservative measures (dietary and lifestyle changes) is expected and should be available with the authorization request.

• Evidence may include weight history, program participation records, and clinician notes reviewing previous nonsurgical interventions.

Document medical therapy tried for Class I obesity with T2D

For adults with BMI 30–34.9 kg/m2 and type 2 diabetes, authorization should document inadequate glycemic control despite optimal lifestyle interventions and medical therapy (e.g., HbA1c ≥7).

• Include recent HbA1c values (showing ≥7) and documentation of trials of lifestyle modification and antidiabetic medications.
• State rationale that medical therapy and lifestyle efforts were insufficient to achieve glycemic control.

Intragastric balloon preconditions for authorization

For temporary intragastric balloon therapies, prior authorization must document prior supervised weight‑loss program attempts and adherence to device maximum placement durations per device labeling.

• Document that the patient failed supervised weight‑loss programs and confirm intended balloon maximum placement duration (e.g., 6–8 months depending on device).
• Include device model and labeled population (BMI ranges) to support authorization.

No additional step therapy specified

No formal step‑therapy protocol (beyond the conservative management and documentation requirements) is specified in the references section of this policy.

• Policy specifies required conservative program participation and failure of nonsurgical measures but does not list additional step therapy sequences.

Certain authorization details not explicitly described

Some procedural or administrative details are not explicitly described in the references section of this policy; follow the policy’s documentation and coding guidance when submitting authorization.

• When in doubt, include full clinical documentation and consult member benefits for plan‑specific limits.
• The policy history and references may clarify code status and past policy changes but are not a substitute for current required documentation.

Required clinical documentation for authorization

Medical records submitted for authorization must document BMI meeting policy criteria, relevant comorbid conditions, completion of a physician‑administered weight‑loss program, and mental health evaluation and clearance.

• Include measured BMI (not self‑reported) with date, documentation of comorbidities listed in the policy, and evidence of a supervised weight‑loss program of ≥3 months within 12 months prior to surgery.
• Attach a licensed mental health provider’s evaluation and explicit clearance; a letter from a non‑mental‑health provider alone is insufficient.

Preoperative EGD documentation requirements

If preoperative esophagogastroduodenoscopy (EGD) is performed, include the indication, findings, classifications used, and an explanation of how findings changed surgical planning or management.

• Document symptoms or clinical indications prompting EGD, EGD findings with standard terminology/classifications, and whether findings altered or delayed the planned procedure.
• For EGD surveillance (e.g., after sleeve gastrectomy), document timing and plan for follow‑up per ASMBS guidance (e.g., ≥3 years post‑SG and ~every 5 years thereafter as reasonable).

Preoperative evaluation documentation to include weight‑related complications

Preoperative evaluation documentation must record weight‑related complications, causes of obesity, justification for offering surgery, and readiness for surgery.

• Include assessment of comorbid conditions (e.g., T2D, OSA, NASH), prior weight‑loss attempts, and the clinical rationale for the chosen bariatric procedure.
• Document multidisciplinary evaluations and any adolescent‑specific readiness criteria when applicable.

EGD documentation for surgical planning and surveillance

Document EGD findings to detect contraindications (e.g., malignancy, large hiatal hernia, peptic ulcer, H. pylori) that would affect procedure selection and to support surveillance plans.

• Record timing of EGD relative to surgery and any preoperative treatment instituted based on findings.
• For sleeve gastrectomy patients, include plans for EGD surveillance per ASMBS recommendations if applicable.

Guidelines and position statements may support documentation

The policy cites multiple guidelines and position statements (ASMBS, AGA, IFSO, SAGES, CMS) that inform preoperative evaluation and documentation; providers may include such guideline references to support authorization when relevant.

• Cited guidance may be used to justify indicated preoperative testing (e.g., selective EGD) and documentation choices.
• Reference the guideline or position statement in the clinical rationale when it directly supports the requested procedure.

Member benefit verification required

Verify member benefits and plan‑specific coverage limits before submitting authorization — member contracts may exclude bariatric services or impose limitations.

• Consult the member benefit booklet or contact customer service to confirm eligibility and any contract age or benefit limitations.
• Coverage is subject to the member's specific plan; this medical policy does not apply to Medicare Advantage.

Denial risk for BMI below coverage thresholds or missing documentation

Authorization will be denied when BMI and clinical thresholds in the policy are not met (e.g., BMI <35 kg/m2 without T2D) or when required documentation is missing.

• Do not request authorization for patients with BMI below policy thresholds unless the patient meets an allowed exception (e.g., Asian‑specific thresholds documented in the record).
• Missing documentation of BMI, comorbidities, or required conservative management participation may trigger denial.

Denial risk when revision requested for noncompliance

Requests for revision or conversion solely because of individual noncompliance with postoperative nutrition and exercise are not considered medically necessary and may be denied.

• If revision is for inadequate weight loss, document objective failure (failure to lose ≥50% EBW or <20% TWL) and evidence of postoperative compliance unless revision is for a complication.
• Noncompliance alone is not an acceptable indication for revision authorization.

Denial risk: missing preoperative program or mental health documentation

Incomplete documentation of required preoperative items (structured weight‑loss program participation, mental health evaluation and clearance, or BMI/comorbidity evidence) is a common trigger for denial.

• Ensure structured program participation and active engagement are documented (weight, diet, activity records) and include licensed mental health clearance.
• Authorization reviewers will check that conservative therapy attempts were reviewed by the practitioner prior to approval.

Denial risk for routine preoperative EGD without indication

Routine preoperative EGD performed without documented symptoms or clinical indication may be considered discretionary and could be unsupported by guideline recommendations, risking denial for routine EGD requests.

• ASMBS recommends preoperative EGD for symptomatic individuals and otherwise leaves routine EGD to surgeon discretion; document clear clinical indication if requesting authorization for preoperative EGD.
• Systematic reviews reported that only about one‑fifth of EGDs find issues that alter operative management; justify routine EGD if included in the request.

Low‑yield EGD: risk of non‑coverage without clear indication

Routine preoperative esophagogastroduodenoscopy (EGD) has limited yield; lack of evidence that routine EGD alters management in most patients may lead to denial of routine EGD unless a documented indication exists.

• Provide documentation of symptoms, abnormal findings on clinical exam, or other indications if requesting preoperative EGD authorization.
• If EGD is performed to inform surgical selection, include how findings affected management.

Contraindications and denial risk

Do not authorize bariatric surgery for patients with listed contraindications (e.g., preadolescent children, pregnant or breastfeeding adolescents or those planning pregnancy within two years, unresolved substance abuse, eating disorder, or untreated psychiatric disorder); such conditions may justify denial.

• Document resolution of substance use, eating disorders, or psychiatric disorders and demonstrate mastery of healthy dietary and activity habits before requesting authorization.
• Adhere to adolescent‑specific requirements (Tanner stage, family stability, pediatric center capabilities) when applicable.

References do not replace authorization requirements

The references section does not itself provide separate authorization actions; use the policy’s prior authorization and documentation requirements when preparing requests.

• References support the policy but do not replace explicit documentation requirements listed in the policy sections.
• Follow the policy documentation checklist rather than relying on references alone for authorization submissions.

Denial risk for unmet medical necessity criteria

Failure to meet the policy’s medical necessity criteria (selection and preoperative requirements) can result in non‑coverage; when reoperation criteria are met, the policy no longer requires meeting initial selection criteria again.

• Provide evidence that the patient meets the applicable selection criteria or the reoperation criteria as described in the policy.
• For reoperation where medical necessity criteria under reoperation are met, do not resubmit initial selection criteria unnecessarily.