Spontaneous rupture of other tendons, left hand

This code signifies a non-traumatic tear or break in a tendon within the left hand, excluding those specifically identified as flexor or extensor tendons. This rupture occurs without an external force or injury, often due to underlying degenerative changes or inflammatory processes.

Apply this code when documentation specifies a spontaneous rupture of a tendon in the left hand, and the specific tendon involved is not a flexor or extensor tendon (e.g., a lumbrical or interosseous tendon). Ensure the rupture is explicitly stated as spontaneous or non-traumatic.

• Differentiate from traumatic tendon ruptures (S66.- codes) which require an external force.
• Confirm the laterality (left hand) and that the ruptured tendon is not a flexor or extensor tendon to avoid miscoding.
• Review documentation for any underlying conditions contributing to the spontaneous rupture, such as rheumatoid arthritis, which may require additional coding.