Services Provided for the Diagnosis and Treatment of Diabetic Sensory Neuropathy with Loss of Protective Sensation (aka Diabetic Peripheral Neuropathy) — NCD 171 | CMS Coverage Update

TL;DR: The Centers for Medicare & Medicaid Services modified NCD 171 governing diabetic peripheral neuropathy foot exam coverage, effective March 7, 2026. Here's what billing teams need to know.

This CMS diabetic sensory neuropathy coverage policy change affects podiatrists, primary care physicians, and any specialist billing Medicare foot exams under NCD 171 in the Medicare system. The policy does not list specific CPT or HCPCS codes in its code tables, but the clinical and documentation requirements are detailed — and they directly affect your claim submission workflow. If your practice bills Medicare for diabetic foot care, this update deserves a close read before patients start arriving.

Quick-Reference Table

CMS Diabetic Peripheral Neuropathy Coverage Criteria and Medical Necessity Requirements 2026

NCD 171 is the National Coverage Determination governing Medicare coverage of foot exams for diabetic sensory neuropathy with loss of protective sensation (LOPS). The effective date of the current modified version is March 7, 2026.

The core coverage rule is straightforward. Medicare covers a foot evaluation — examination and treatment — no more than once every six months. The patient must have a documented diagnosis of diabetic sensory neuropathy with LOPS. This coverage has been in place since July 1, 2002, but the medical necessity criteria within this modified policy are specific enough that many practices are leaving themselves exposed on documentation.

Who Qualifies Under This Coverage Policy

The patient must have a confirmed diagnosis of diabetic sensory neuropathy with LOPS. "Documented diagnosis" isn't optional language — it's a hard requirement. No documentation, no medical necessity, no reimbursement.

LOPS must be diagnosed using the 5.07 Semmes-Weinstein monofilament. The testing protocol is precise. You test five sites on the plantar surface of each foot. You test those sites randomly — not rhythmically. You avoid heavily callused areas. An absence of sensation at two or more sites out of five on either foot is the threshold for a positive LOPS diagnosis.

That last point matters more than it looks. Two or more sites, out of five tested, on either foot. Not both feet. Document the exact sites tested, the results at each site, and the monofilament used. If your current intake or EHR template doesn't capture this level of detail, fix it before the March 7, 2026 effective date.

The Six-Month Frequency Limit and the Interim Visit Rule

Medicare allows this exam no more than every six months. But there's a catch that trips up billing teams regularly. The patient cannot have seen a foot care specialist for any other reason in the interim period between exams.

Read that again. If your patient saw a podiatrist for an unrelated issue — nail trimming, a blister, anything — in the months between their scheduled diabetic foot exams, that interim contact breaks the coverage eligibility for the next scheduled exam. Build a check into your scheduling and eligibility workflow that flags recent foot care specialist visits before the patient is roomed.

This is one of the most common reasons claim denial happens on these visits. The patient looks eligible on the surface, but a quick history reveals an interim foot care visit nobody caught.

Prior Authorization Under NCD 171

This policy does not require prior authorization for covered foot exams. However, the detailed documentation requirements function as a de facto prior authorization checklist — if you can't produce complete records showing every required exam element, you will lose the claim on audit or appeal. Treat your documentation protocol with the same rigor you'd apply to a prior auth submission.

Coverage Indications at a Glance

CMS Diabetic Peripheral Neuropathy Billing Guidelines and Action Items 2026

The real issue with NCD 171 isn't clinical — it's operational. The policy's requirements are clear. The failure points are in documentation templates, scheduling workflows, and charge capture routines. Here's what your billing team should do now.

If your practice sees a high volume of diabetic patients and you're not sure how this coverage policy intersects with your current billing patterns, loop in your compliance officer before March 7, 2026.

CPT, HCPCS, and ICD-10 Codes for Diabetic Sensory Neuropathy Foot Exams Under NCD 171

This policy does not list specific CPT, HCPCS, or ICD-10 codes in its code data. That's an important flag for your billing team.

The absence of listed codes in the policy document doesn't mean the service goes uncoded — it means you need to identify the correct codes through your Medicare Administrative Contractor (MAC) and cross-reference the claims processing instructions linked in the policy: Transmittals AB-02-158, AB-02-096, AB-02-109, and A-02-039.

The claims processing transmittals are where billing guidelines for the specific procedure codes used to bill these exams live. Pull those documents and confirm the codes your MACs accept for diabetic sensory neuropathy foot exams under NCD 171. Regional local coverage determination (LCD) policies from your MAC may also apply and should be reviewed alongside this NCD.

Work with your coding team, your MAC's provider relations line, or your billing consultant to confirm which CPT codes your practice uses for these exams and verify they're aligned with the transmittal guidance. If you're not sure which codes to use given your specific patient mix, that's a conversation for your compliance officer before the effective date.