CMS modified NCD 94 for electrotherapy treatment of Bell's Palsy, effective March 7, 2026. Here's what billing teams need to know.
The Centers for Medicare & Medicaid Services updated NCD 94 — the National Coverage Determination governing Medicare coverage of electrotherapy for facial nerve paralysis — with a modification dated March 7, 2026. The policy's position hasn't softened: electrotherapy for Bell's Palsy remains non-covered under Medicare. The effective date of March 7, 2026 is the trigger for applying updated billing guidelines and for auditing any active claims or treatment plans tied to this service.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | CMS (Centers for Medicare & Medicaid Services) |
| Policy | Electrotherapy for Treatment of Facial Nerve Paralysis (Bell's Palsy) |
| Policy Code | NCD 94 |
| Change Type | Modified |
| Effective Date | March 7, 2026 |
| Impact Level | Medium — high denial risk if billed to Medicare |
| Specialties Affected | Neurology, physical therapy, physical medicine & rehabilitation, otolaryngology, facial plastics |
| Key Action | Do not submit electrotherapy for Bell's Palsy to Medicare; issue ABNs where applicable and redirect patients to non-Medicare payment sources |
CMS Electrotherapy for Bell's Palsy Coverage Criteria and Medical Necessity Requirements 2026
This is one of the cleaner Medicare coverage positions you'll encounter. CMS says electrotherapy for facial nerve paralysis — Bell's Palsy — does not meet the medical necessity standard because clinical effectiveness has not been established.
That language matters. "Clinical effectiveness has not been established" is the same framing CMS uses across other non-covered NCDs. It's not a temporary hold waiting for more evidence. It's a categorical exclusion, and the NCD 94 Medicare system encodes it as non-covered across the board.
No prior authorization process exists here — because prior authorization implies a path to approval. There is no approval path under this NCD. Submitting a claim to Medicare for electrotherapy treatment of Bell's Palsy will generate a denial. That denial is predictable, consistent, and not something a well-written appeal will reverse under current NCD 94 criteria.
The CMS electrotherapy facial nerve paralysis coverage policy does not include exceptions for severity of paralysis, duration of condition, or prior treatment failure. If your team has been billing this service to Medicare assuming some cases qualify, stop. None do under this NCD.
What the NCD 94 Policy Actually Covers — and Why Medical Necessity Fails Here
The policy describes the service clearly. Electrotherapy for Bell's Palsy 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 (galvanic or faradic) — is used with a pad electrode and a hand applicator electrode.
That's a well-defined service. The problem isn't ambiguity about what's being done. The problem is CMS's assessment that the clinical evidence doesn't support coverage.
Medical necessity under Medicare requires that a service be reasonable and necessary for the diagnosis and treatment of illness or injury. CMS has determined electrotherapy for Bell's Palsy doesn't clear that bar. No amount of clinical documentation from the treating provider changes the NCD's determination.
This is worth saying plainly: documenting medical necessity in your chart notes doesn't create a coverage exception to an NCD. It helps in situations where LCD-level or contractor-level coverage decisions are in play. With a national non-coverage determination, documentation improves your defense posture for compliance purposes — but it won't generate reimbursement from Medicare.
CMS Electrotherapy for Bell's Palsy Exclusions and Non-Covered Indications
The exclusion here is total. CMS does not cover electrotherapy for the treatment of facial nerve paralysis under any clinical scenario described in NCD 94.
There are no carve-outs for inpatient versus outpatient settings. There are no exceptions based on the device type (galvanic versus faradic). The coverage policy makes no distinction between acute-onset Bell's Palsy and chronic facial nerve paralysis.
What this means practically: any provider — physician, physical therapist, or rehabilitation specialist — who bills Medicare for this service will face a claim denial. This applies whether the service is billed under the Physicians' Services benefit category or in a therapy context.
If your practice treats Bell's Palsy patients who are Medicare beneficiaries and you offer electrotherapy, you need a clear internal protocol before the March 7, 2026 effective date. That protocol should address advance beneficiary notice of non-coverage (ABN) issuance, patient payment responsibility, and how your billing team codes and tracks these encounters.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Electrotherapy for facial nerve paralysis (Bell's Palsy) — all presentations | Not Covered | Not specified by CMS in NCD 94 | Non-covered under Medicare; clinical effectiveness not established |
| Electrical stimulation to prevent facial muscle degeneration | Not Covered | Not specified by CMS in NCD 94 | Included within NCD 94 scope; no coverage exceptions |
| Galvanic or faradic current application to facial muscles | Not Covered | Not specified by CMS in NCD 94 | Device type does not create a coverage distinction |
CMS Electrotherapy Bell's Palsy Billing Guidelines and Action Items 2026
The real issue here isn't understanding the policy — it's making sure your team's workflows reflect it before denials accumulate. Here's what to do.
| # | Action Item |
|---|---|
| 1 | Audit your charge capture for any electrotherapy services billed to Medicare for facial nerve paralysis diagnoses. Pull claims from the last 12 months. If you've submitted these, identify the denial rate and any overpayments you may need to address. Do this before March 7, 2026. |
| 2 | Issue Advance Beneficiary Notices of Non-Coverage (ABNs) to Medicare patients before providing electrotherapy for Bell's Palsy. The ABN documents that the patient was informed Medicare will not pay, and it protects your ability to bill the patient directly. Without a valid ABN, you can't collect from the patient either. |
| 3 | Remove electrotherapy for Bell's Palsy from any Medicare fee schedule or superbill that treats it as a potentially covered service. If your charge master includes this service without a non-covered flag, fix it. A superbill that makes this look billable creates staff confusion and billing errors. |
| 4 | Verify whether your Medicare Administrative Contractor (MAC) has issued a related Local Coverage Determination (LCD) or billing guidance. NCDs set the national floor, but MACs sometimes issue supplemental billing instructions. Check your MAC's website for any claims processing instructions cross-referenced to NCD 94. |
| 5 | Train your clinical and front-desk staff on the coverage policy. Patients with Bell's Palsy often ask whether Medicare covers their treatment. Your team should be able to answer accurately — electrotherapy is not covered under Medicare, and the patient is financially responsible if they proceed. That conversation needs to happen before treatment, not at the billing stage. |
| 6 | Document the clinical rationale for offering electrotherapy regardless of payment source. Even without Medicare reimbursement, strong clinical documentation protects you in audits, supports self-pay or commercial insurance billing, and demonstrates that the service met professional standards of care. |
| 7 | If your practice bills commercial payers or Medicaid for the same service, review those policies separately. NCD 94 governs Medicare only. Commercial payers and state Medicaid programs make independent coverage decisions. Some may cover electrotherapy for Bell's Palsy — check each payer's coverage policy individually before assuming the Medicare exclusion applies everywhere. |
| 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
No Codes Specified in NCD 94
CMS does not list specific CPT, HCPCS Level II, or ICD-10-CM codes in NCD 94. The policy describes the service in clinical terms but does not attach billing codes to the non-coverage determination.
This is a billing guidelines gap worth flagging to your team. The absence of specific codes in the NCD means your billing team needs to identify the relevant codes independently — and apply the non-coverage determination to claims using those codes.
For context, electrotherapy services are typically billed under electrical stimulation CPT codes used in physical therapy and rehabilitation settings. ICD-10-CM code G51.0 (Bell's Palsy) is the primary diagnosis code for facial nerve paralysis of idiopathic onset. However, because NCD 94 does not enumerate codes, and because PayerPolicy's data reflects the actual policy document, we are not assigning codes here that the policy itself does not specify.
Talk to your compliance officer or billing consultant about which CPT and HCPCS codes your practice currently uses for electrotherapy services, and flag those codes for NCD 94 non-coverage screening in your billing system. If you're unsure how to map your charge codes to this NCD, that's exactly the kind of question to bring to your MAC before submitting claims.
What to Watch at the MAC Level
Because NCD 94 doesn't specify codes, your MAC's claims processing instructions become more important. MACs sometimes issue Local Coverage Determinations or billing articles that provide the code-level granularity that NCDs omit. Check with your MAC — whether that's Novitas, CGS, Palmetto GBA, WPS, or another contractor — for any billing instructions tied to NCD 94 or electrotherapy services for Bell's Palsy. Those instructions are the practical layer that sits between the national policy and your claim submission.
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