Procedure billing guide

Auricular Neurostimulation (Ear Stim) Billing

Percutaneous auricular neurostimulation, often called ear stim, uses a small external device with needle electrodes placed in the ear. It should not be billed as an implanted neurostimulator (CPT 64555 with HCPCS L8679). Many payers do not cover it, and Medicare contractors and the HHS Office of Inspector General have flagged claims billed that way. DOCS4DOCS verifies coverage first and bills it the way each payer requires.

Updated October 12, 2026

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Billing rules

How do you bill auricular neurostimulation?

Why does ear stim billing draw audits?

Because it is often billed with the wrong codes. Some practices have billed these devices using implanted neurostimulator codes, which pay far more than the service provided. Medicare contractors and the OIG have identified these claims as improper, and practices that billed them have faced repayment demands.

How should auricular neurostimulation be billed?

Check the payer's policy first, never bill it as an implanted neurostimulator, and report the placement with an unlisted code when the payer requires one. When a denial is expected, get a signed ABN from Medicare patients or a written financial agreement from commercial patients before the service.

Check each payer's policy before the service
Report the placement with an unlisted code when the payer requires it, with a clear description of the service
For Medicare patients, obtain a signed Advance Beneficiary Notice (ABN) when denial is expected
For commercial patients, set up a written financial agreement for non-covered services

Common denials

Why are ear stim claims denied?

These are the denial reasons we see most often. We check for each one before a claim goes out, instead of finding out from a denial.

Denials we prevent

Service not covered by the payer
Billed as an implanted neurostimulator (64555 and L8679), which can lead to recoupment
No ABN or financial waiver on file, so the patient cannot be billed

FAQ

Auricular Neurostimulation questions

Can auricular neurostimulation be billed with 64555 and L8679?

No. Those codes describe an implanted neurostimulator. Percutaneous auricular devices are external, and billing them with implant codes has been identified as improper by Medicare contractors and the OIG.

Does Medicare cover ear stim for pain?

Medicare generally does not cover percutaneous auricular neurostimulation for pain. Practices should obtain a signed ABN before providing it to Medicare patients.

Sources

Coverage rules change; always check the current version of each policy and your payer’s own rules.

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Your procedures, payers, billing software and current challenges.
2
We review your billing
We look at where claims are denied, underpaid or delayed.
3
Get a clear plan
We recommend how we can take over or support your revenue cycle.

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