Spontaneous rupture of extensor tendons, right forearm

This code signifies a non-traumatic tear of the extensor tendons located in the right forearm. This rupture occurs without an external force or injury, often due to underlying degenerative changes, inflammatory conditions, or chronic overuse. It results in impaired extension of the wrist and/or fingers.

Apply this code when documentation clearly indicates a spontaneous (non-traumatic) rupture of one or more extensor tendons in the patient's right forearm. This diagnosis is typically supported by physical examination findings of extensor lag, imaging studies (e.g., ultrasound, MRI) confirming the tear, and a history ruling out acute trauma.

• Ensure documentation specifies "spontaneous" to differentiate from traumatic ruptures.
• Verify the laterality (right forearm) is explicitly stated in the clinical notes.
• Consider sequencing this code with any underlying conditions contributing to the spontaneous rupture, such as rheumatoid arthritis or chronic tenosynovitis.