M66 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Spontaneous rupture of synovium and tendon.
Includes
Rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
Type 2 excludes
Rotator cuff syndrome (M75.1-)
Rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
Codes
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code