ICD-10-CM › M00-M99 › M65-M67 › M codes › M66

M66

Spontaneous rupture of synovium and tendon

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 6 more specific codes instead:

  • M66.0 Rupture of popliteal cyst
  • M66.1 Rupture of synovium (also a header)
  • M66.2 Spontaneous rupture of extensor tendons (also a header)
  • M66.3 Spontaneous rupture of flexor tendons (also a header)
  • M66.8 Spontaneous rupture of other tendons (also a header)
  • M66.9 Spontaneous rupture of unspecified tendon

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Spontaneous rupture of synovium and tendon

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes2 - not included here

  • rotator cuff syndrome (M75.1-)
  • rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region

Includes

  • rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength