Spontaneous rupture of extensor tendons, left ankle and foot

This code signifies a non-traumatic tear or break in the extensor tendons located in the left ankle and/or foot. This condition typically results from degenerative changes within the tendon rather than an acute injury. Patients often present with sudden pain, swelling, and an inability to dorsiflex the left foot or toes.

Apply this code when documentation clearly indicates a spontaneous (non-traumatic) rupture of an extensor tendon affecting the left ankle or foot. This diagnosis is supported by imaging studies (e.g., MRI, ultrasound) confirming tendon discontinuity and a clinical history ruling out an acute external force or injury.

• Ensure laterality (left) is explicitly documented for the ankle and foot.
• Distinguish from traumatic tendon ruptures, which are coded differently (e.g., S96.0-).
• Verify the specific tendon involved if documented, though this code is broad for extensor tendons.