Other rupture of muscle (nontraumatic), left lower leg

This code signifies a spontaneous tear or break in a muscle of the left lower leg that is not caused by an external injury or trauma. It represents a non-traumatic muscle rupture, often due to underlying degenerative changes, overuse, or sudden uncoordinated movements.

Apply this code when documentation clearly states a non-traumatic rupture of a muscle in the left lower leg. This includes conditions like a spontaneous tear of the gastrocnemius or soleus muscle without an inciting traumatic event. Ensure the physician's notes explicitly rule out trauma as the cause.

• Confirm laterality (left) and anatomical site (lower leg) are precisely documented.
• Distinguish carefully from traumatic muscle ruptures (S76.- for thigh, S86.- for lower leg), which are coded differently.
• Ensure "nontraumatic" is explicitly stated or clearly implied by the clinical context to avoid miscoding.