M66
M66: Spontaneous rupture of synovium and tendon
Non-billable headerICD-10-CM
M66 is a non-billable header ICD-10-CM code for spontaneous rupture of synovium and tendon. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes2: not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- rotator cuff syndrome (M75.1-)
- rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
Includes
Conditions this code covers.
- rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
Other codes that can never be billed with M66
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead M66
6 child codes. Green means billable.