Billing and Coding: Autonomic Function Testing

ANS testing is covered to confirm or exclude specific autonomic diseases (initial testing typically once) and for patients with diagnosed autonomic disorders when there is a change in clinical status or to assess response to therapy. Medical necessity must be documented in the medical record (history, exam, relevant diagnostic test results, test reports and interpretation), equipment should meet professional standards including FDA clearance, and repeat testing is generally limited to once per year; atypical provider volume, excessive frequency, absence of tilt table where codes 95921-95924 are billed, or deviations from the related LCD may prompt medical review.

"Autonomic Nervous System (ANS) testing is allowed once to confirm or exclude a specific autonomic disease when medically necessary."

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