Oth chronic hematogenous osteomyelitis, left ankle and foot

This code signifies a persistent, long-standing bone infection in the left ankle or foot that originated from a bloodstream infection. It indicates a non-acute inflammatory process within the bone tissue, typically characterized by periods of remission and exacerbation.

Apply this code when documentation explicitly states chronic osteomyelitis of the left ankle or foot, with a hematogenous (blood-borne) origin. This diagnosis is often supported by imaging studies (X-ray, MRI), bone biopsy results, and a history of systemic infection preceding the bone involvement.

• Ensure documentation specifies "chronic" and "hematogenous" to differentiate from acute or other forms of osteomyelitis.
• Verify the laterality (left) and specific anatomical site (ankle and foot) are clearly documented.
• Do not use for osteomyelitis resulting from direct inoculation (e.g., trauma, surgery) or contiguous spread from soft tissue infection.