Billing and Coding: Autonomic Function Testing

Autonomic function testing is covered to confirm or exclude specific autonomic nervous system disorders and for follow-up testing when there is a documented change in clinical status or response to therapy. Claims must include a valid ICD‑10 diagnosis, referring physician name/NPI when required, test results or symptoms, and medical record documentation supporting medical necessity; CPT codes 95921–95924 are subject to coding edits and CPT 95922 must not be reported with 95921. Initial diagnostic testing is generally allowed once and repeat testing is not expected to exceed once per year; deviations or high-frequency utilization may trigger medical review.

"Autonomic function testing is covered to confirm or exclude a specific autonomic nervous system disorder when medically necessary."

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