TL;DR: The Centers for Medicare & Medicaid Services modified NCD 94, the National Coverage Determination governing Medicare coverage of electrotherapy for facial nerve paralysis (Bell's Palsy), effective March 7, 2026. The position hasn't changed — Medicare does not cover this treatment — but the policy update is now live in the system, and your billing team needs to handle these claims correctly before they hit the queue.
This is NCD 94 in the CMS system. No CPT or HCPCS codes are listed in the policy document itself, which creates its own billing challenge — more on that below. What matters right now is that any claim for electrotherapy targeting Bell's Palsy is a guaranteed denial under Medicare, and the effective date of March 7, 2026 is already past.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Medicare) |
| Policy | Electrotherapy for Treatment of Facial Nerve Paralysis (Bell's Palsy) |
| Policy Code | NCD 94 |
| Change Type | Modified |
| Effective Date | 2026-03-07 |
| Impact Level | Medium |
| Specialties Affected | Neurology, Physical Medicine & Rehabilitation, Physical Therapy, Otolaryngology, Family Medicine |
| Key Action | Flag all electrotherapy claims for Bell's Palsy patients as non-covered before submission; issue ABN if service has already been rendered |
CMS Electrotherapy for Bell's Palsy Coverage Criteria and Medical Necessity Requirements 2026
The CMS electrotherapy facial nerve paralysis coverage policy is a flat denial. There are no criteria you can meet. There are no documentation thresholds that unlock coverage. Medicare does not cover electrotherapy for Bell's Palsy because CMS has determined its clinical effectiveness has not been established.
That phrase — "clinical effectiveness has not been established" — is the operative language here. It places this treatment in a specific category of non-coverage under Medicare. This is different from a service that's covered with conditions or that requires prior authorization. There is no prior authorization pathway because prior authorization only applies to services that are, at baseline, eligible for coverage.
The treatment itself involves applying electrical stimulation to affected facial muscles. The goal is to provide muscle innervation and prevent muscle degeneration. A device generating electrical current with controlled frequency, intensity, waveform, and type — either galvanic or faradic — is used alongside a pad electrode and a hand applicator electrode. Clinically, some providers and patients find this compelling. Medicare doesn't care. The medical necessity bar was never cleared.
This is worth saying plainly to your billing team: there is no combination of diagnosis codes, provider credentials, or clinical notes that makes this covered under Medicare. If a patient receives this treatment and has Medicare as their primary payer, you are looking at a non-covered service, period.
The coverage policy does note this falls under the Physicians' Services benefit category. That matters if you're trying to determine what benefit bucket to reference when issuing an Advance Beneficiary Notice of Noncoverage (ABN).
CMS Electrotherapy for Bell's Palsy Exclusions and Non-Covered Indications
The entire service category is excluded. CMS does not cover electrotherapy for the treatment of facial nerve paralysis under any circumstances currently recognized in NCD 94.
The rationale is clinical uncertainty, not administrative policy. CMS explicitly states the clinical effectiveness of this treatment "has not been established." That language signals this is in the same bucket as experimental or investigational treatments — services where the evidence base hasn't satisfied Medicare's coverage standard.
This is not a local coverage determination (LCD) situation where a Medicare Administrative Contractor (MAC) might have a different take by region. NCD 94 is a national coverage determination, which means it applies uniformly across all MACs, all regions, all Medicare fee-for-service claims. There is no jurisdiction where a MAC can override this and cover the service.
Some billing teams make the mistake of thinking that because a treatment is clinically reasonable, there's a path to reimbursement with the right documentation. Not here. The non-coverage designation is categorical. Your compliance officer should confirm this with your specific MAC if there's any doubt, but the national policy is unambiguous.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Electrotherapy for facial nerve paralysis (Bell's Palsy) — electrical stimulation to prevent muscle degeneration | Not Covered | No codes listed in NCD 94 | Clinical effectiveness not established; applies across all MACs nationally; ABN required if patient requests service |
CMS Electrotherapy for Bell's Palsy Billing Guidelines and Action Items 2026
The effective date of March 7, 2026 means this policy is active now. Here's what your team does:
| # | Action Item |
|---|---|
| 1 | Pull any pending claims for electrotherapy tied to Bell's Palsy or facial nerve paralysis diagnoses and hold them. Do not submit these to Medicare. A claim denial is the best outcome if you submit without addressing coverage first — the worst outcome is a compliance issue if this pattern repeats without correction. |
| 2 | Issue an Advance Beneficiary Notice of Noncoverage (ABN) for any patient receiving this service. The ABN must be issued before the service is rendered, not after. If your providers are already delivering this treatment to Medicare patients without an ABN in place, fix that workflow immediately. The ABN allows you to bill the patient directly. |
| 3 | Confirm your charge capture and electronic health record (EHR) order sets don't route electrotherapy for Bell's Palsy to Medicare. This sounds obvious, but order sets built years ago may not have flagged this. Check your system's claim scrubbing rules as well — set them to catch this before anything goes out the door. |
| 4 | Talk to your compliance officer before March 31, 2026 if you have a high volume of Bell's Palsy patients receiving electrotherapy. If this has been billed to Medicare in the past and paid, you may have a repayment obligation. That's a separate issue from the policy change itself, but the modification date is a natural trigger to look backward. |
| 5 | Note that NCD 94 does not list specific CPT or HCPCS codes. This means your billing team needs to identify the relevant electrotherapy billing codes internally — typically codes under the electrical stimulation category — and apply the non-coverage rule manually. Work with your coding team to identify which codes in your current charge master apply to this treatment type and flag them accordingly for Medicare claims. |
| 6 | Do not attempt to recode this service as something else to get Medicare reimbursement. Upcoding or miscoding a non-covered service to a covered one is a billing compliance violation. If the clinical service delivered is electrotherapy for Bell's Palsy, that's what gets coded — and that claim does not go to Medicare without an ABN and patient responsibility established in advance. |
One more thing: this policy change being categorized as "Modified" rather than newly issued means there may be language differences from a prior version. The substance — non-coverage — hasn't changed. But if your billing guidelines, patient intake materials, or payer contract summaries reference the old NCD 94 language, update them to reflect the March 7, 2026 version.
| 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 |
CPT, HCPCS, and ICD-10 Codes for Electrotherapy for Bell's Palsy Under NCD 94
Codes Listed in NCD 94
The Centers for Medicare & Medicaid Services did not include specific CPT or HCPCS codes in the NCD 94 policy document. This is a meaningful gap for billing teams.
| Code Type | Status |
|---|---|
| CPT | None listed in NCD 94 |
| HCPCS | None listed in NCD 94 |
| ICD-10-CM | None listed in NCD 94 |
What This Means for Your Billing Team
Because NCD 94 does not enumerate specific codes, you cannot rely on the policy document alone to build a claim edit or charge capture flag. You need to do the internal mapping yourself.
Electrotherapy for facial nerve paralysis typically involves electrical stimulation services. Your coding team should identify which CPT and HCPCS codes in your current charge master represent this clinical service, then apply the NCD 94 non-coverage rule to those codes for Medicare claims. Do not guess — work with your coders or a billing consultant to confirm the mapping before your next billing cycle.
The absence of codes in an NCD is not unusual for older national determinations. But it does mean the compliance burden shifts to your team to define the code universe this policy applies to. If you're unsure how broad that is for your specific practice mix, your MAC's provider relations team can sometimes help clarify scope. Your compliance officer should be in the loop on this one.
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