Pathological dislocation of left ankle, NEC

This code signifies a spontaneous or atraumatic displacement of the bones forming the left ankle joint, occurring due to an underlying disease process rather than external trauma. This dislocation is not attributable to congenital malformation, old injury, or other specified causes.

Use this code when documentation clearly indicates a non-traumatic dislocation of the left ankle resulting from a systemic disease, infection, or degenerative condition affecting joint integrity. Supporting documentation should specify the left ankle and rule out traumatic or congenital etiologies.

• Ensure the documentation explicitly states "pathological" or "spontaneous" dislocation of the left ankle.
• Always sequence an underlying disease code (e.g., rheumatoid arthritis, osteomyelitis) first, as it is the primary cause of the pathological dislocation.
• Do not use this code for dislocations due to acute trauma (S93.0-), congenital deformities (Q65-Q79), or old injuries (M24.4-).