Spontaneous rupture of extensor tendons, left thigh

This diagnosis code signifies a non-traumatic tear of the extensor tendons located in the left thigh. This condition typically involves the quadriceps or patellar tendons, resulting in a sudden loss of active knee extension. It often occurs in individuals with underlying systemic conditions that weaken tendon integrity.

Apply this code when documentation explicitly states a spontaneous (non-traumatic) rupture of an extensor tendon in the left thigh. This includes cases where the rupture is due to degenerative changes, inflammatory conditions, or metabolic disorders affecting tendon strength. Supporting documentation should clearly indicate the laterality and the spontaneous nature of the rupture.

• Ensure documentation specifies "spontaneous" or "non-traumatic" to differentiate from traumatic ruptures.
• Verify laterality (left thigh) is clearly stated; separate codes exist for the right thigh and unspecified side.
• Consider co-reporting underlying systemic conditions (e.g., chronic kidney disease, diabetes mellitus) that may predispose to spontaneous tendon ruptures.