CMS NCD 38 Treatment of Obesity Policy Update: What Billing Teams Need to Know for 2026
The Centers for Medicare & Medicaid Services has issued a modification to National Coverage Determination (NCD) 38, the longstanding policy governing Medicare coverage for the treatment of obesity. The key structural change in this update is the removal of section 40.5 from the NCD Manual—that content has been formally incorporated into NCD 100.1, which addresses intensive behavioral therapy for obesity. If your practice bills Medicare for any obesity-related services, this reorganization affects where you look for authoritative coverage guidance.
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Treatment of Obesity |
| Policy Code | NCD 38 |
| Change Type | Modified |
| Effective Date | 2026-03-12 |
| Impact Level | Medium |
| Specialties Affected | Primary Care, Internal Medicine, Endocrinology, Bariatric Surgery, Behavioral Health, Nutrition/Dietetics |
| Key Action | Update internal policy reference documents to replace NCD 38, section 40.5 with NCD 100.1 for obesity treatment billing guidance. |
What Changed in CMS NCD 38 Treatment of Obesity (2026 Update)
The substantive modification in this version of NCD 38 is administrative but consequential: section 40.5 has been removed from the NCD Manual entirely and folded into NCD 100.1. That cross-reference now sits alongside two other related NCDs—100.8 and 100.11—forming a consolidated cluster of obesity-related coverage policy under CMS.
This matters for billing teams because internal reference documents, payer policy libraries, and compliance checklists that point to NCD 38, section 40.5 as the source of truth for certain obesity treatment coverage criteria are now pointing to a deprecated location. The coverage guidance itself hasn't necessarily changed—but the canonical home for it has moved.
Think of this the way you'd think about a CPT code being deleted and replaced with a revised code. The underlying clinical intent may be similar, but billing to the old code creates a documentation and compliance gap. The same logic applies here: citing a removed section in documentation or appeals correspondence creates unnecessary risk.
CMS Obesity Coverage Policy: Benefit Categories Still in Effect
NCD 38 continues to recognize two benefit categories under Medicare for obesity-related services:
- Incident to a physician's professional service — Services provided by auxiliary personnel (such as dietitians or health coaches) under physician supervision may qualify under this benefit category.
- Physicians' services — Direct clinical services provided by a treating physician remain within scope.
These benefit categories haven't changed with this modification. What changed is the routing of specific coverage criteria from section 40.5 of NCD 38 into NCD 100.1. Billing teams should now treat NCD 100.1 as the primary reference for those criteria.
How NCD 38 Connects to Related CMS Obesity Policies
CMS explicitly cross-references three companion NCDs in this updated policy. Understanding how they relate to each other is essential for complete billing compliance:
- NCD 100.1 — Now the primary home for the content previously in NCD 38, section 40.5. This NCD covers intensive behavioral therapy (IBT) for obesity, including the specific visit structure, frequency limits, and medical necessity requirements for Medicare reimbursement.
- NCD 100.8 — Covers intensive cardiac rehabilitation programs, which may intersect with obesity treatment in patients with comorbid cardiovascular disease.
- NCD 100.11 — Addresses intensive behavioral therapy for cardiovascular disease, another relevant touchpoint for patients presenting with obesity alongside cardiac risk factors.
For practices treating patients with obesity-related comorbidities—which describes the vast majority of Medicare beneficiaries in this population—understanding the interaction between all three cross-referenced NCDs is not optional. A claim that touches obesity and cardiac disease simultaneously may require documentation aligned with multiple NCDs.
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
Affected Codes
This policy update does not list specific CPT, HCPCS, or ICD-10 codes within NCD 38 itself. Code-level billing guidance for obesity treatment services has been incorporated into the cross-referenced NCDs, particularly NCD 100.1.
What this means for your coding team: Do not look to NCD 38 for code-specific coverage criteria. Instead, reference NCD 100.1 directly for the applicable code sets and selection criteria governing obesity treatment services billed to Medicare.
For the current code tables associated with intensive behavioral therapy for obesity, access NCD 100.1 directly via the CMS Medicare Coverage Database or through your payer policy tracking system. PayerPolicy maintains version-tracked records of all three cross-referenced NCDs.
What Your Billing Team Should Do
| # | Action Item |
|---|---|
| 1 | Update your internal policy reference library by March 12, 2026. Any documentation, billing guides, or compliance checklists that cite NCD 38, section 40.5 as a coverage authority should be revised to reference NCD 100.1. This includes denial management scripts and appeals templates. |
| 2 | Review NCD 100.1 in full before the effective date. Since section 40.5 content has been incorporated there, NCD 100.1 is now the operative policy for that coverage criteria. Confirm that your team's understanding of IBT for obesity coverage requirements aligns with the current version of NCD 100.1—not assumptions carried over from the old NCD 38 section. |
| 3 | Audit open and pending claims that involve obesity treatment services. If any claims in your current AR cycle include documentation or appeal language referencing NCD 38, section 40.5, flag them for revision before submission or resubmission. |
| 4 | Brief physicians and clinical staff on the cross-reference structure. Clinicians who include policy citations in their clinical documentation or prior auth submissions need to know that the section 40.5 reference is no longer valid. This is particularly relevant for endocrinologists, bariatric practices, and primary care providers with high Medicare obesity patient volume. |
| 5 | Set a policy review reminder for NCD 100.1, 100.8, and 100.11. Since CMS has explicitly linked these three NCDs in the updated cross-reference, a change to any one of them could affect your obesity treatment billing. Tracking them together—rather than in isolation—reduces the risk of a gap in coverage awareness. |
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