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M66.361

Billable

Spontaneous rupture of flexor tendons, right lower leg

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

What This Code Means

A spontaneous breaking or tearing of the flexor tendons in the right lower leg that occurs without a known injury.

Coding Tips

  • •Verify right side is correctly documented; use M66.362 for left lower leg
  • •Document the specific flexor tendon involved if possible (e.g., tibialis posterior, flexor digitorum longus)

Code Hierarchy

└M66Spontaneous rupture of synovium and tendon└M66.3Spontaneous rupture of flexor tendons└M66.36Spontaneous rupture of flexor tendons, lower leg└M66.361Spontaneous rupture of flexor tendons, right lower leg
└M66.361Spontaneous rupture of flexor tendons, right lower leg

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