Subacute osteomyelitis, left hand

This code signifies an inflammatory process of the bone and bone marrow in the left hand that has progressed beyond the acute phase but has not yet become chronic. It typically involves bacterial infection, leading to bone destruction and new bone formation over weeks to months.

Apply this code when documentation specifies osteomyelitis of the left hand with a subacute presentation, indicating symptoms and signs persisting for several weeks to a few months. Supporting documentation should include imaging findings (e.g., X-ray, MRI) and potentially culture results confirming infection.

• Differentiate from acute osteomyelitis (M86.1-) and chronic osteomyelitis (M86.3-) based on the duration and progression of the infection.
• Ensure laterality is clearly documented as "left hand" to support this specific code.
• Code any associated infectious organism (e.g., B95-B97) as an additional diagnosis, if identified.