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M20.21

Billable

Hallux rigidus, right foot

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

What This Code Means

A condition where the big toe joint becomes stiff and rigid on the right foot, limiting its ability to bend.

Coding Tips

  • •Always verify laterality is documented as 'right' before assigning this code
  • •Consider documenting the stage of hallux rigidus (mild, moderate, severe) as it may affect treatment decisions

Code Hierarchy

└M20Acquired deformities of fingers and toes└M20.2Hallux rigidus└M20.21Hallux rigidus, right foot
└M20.21Hallux rigidus, right foot

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