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M66.229

Billable

Spontaneous rupture of extensor tendons, unspecified upper arm

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 extensor tendons in an unspecified upper arm, occurring without a known injury or trauma.

Coding Tips

  • •Use this code when the specific side (right or left) of the upper arm is not documented; query the provider if laterality is known
  • •Spontaneous rupture typically occurs due to degenerative conditions, chronic inflammation, or weakened tendons rather than acute injury

Code Hierarchy

└M66Spontaneous rupture of synovium and tendon└M66.2Spontaneous rupture of extensor tendons└M66.22Spontaneous rupture of extensor tendons, upper arm└M66.229Spontaneous rupture of extensor tendons, unspecified upper arm
└M66.229Spontaneous rupture of extensor tendons, unspecified upper arm

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