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G51.33

Billable

Clonic hemifacial spasm, bilateral

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Involuntary muscle twitching and spasms affecting both sides of the face, causing repetitive contractions on the left and right.

Coding Tips

  • •Bilateral hemifacial spasm is relatively rare; verify documentation clearly indicates involvement of both sides
  • •Consider whether separate codes for each side might be more appropriate if spasms are asymmetric in severity

Code Hierarchy

└G51Facial nerve disorders└G51.3Clonic hemifacial spasm└G51.33Clonic hemifacial spasm, bilateral
└G51.33Clonic hemifacial spasm, bilateral

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