Oth chronic hematogenous osteomyelitis, unsp radius and ulna

This code signifies a persistent, long-term bone infection in the radius and/or ulna that originated from a bloodstream infection, but the specific bone(s) affected in the forearm are not documented. It indicates a non-acute, ongoing inflammatory process within the bone marrow and cortex of the forearm.

Apply this code when documentation confirms chronic osteomyelitis of the radius and/or ulna, with a hematogenous origin, but the specific bone (radius or ulna) is not specified. This typically occurs after an initial acute infection has resolved or been inadequately treated, leading to a smoldering, persistent infection. Supporting documentation should include imaging reports (X-ray, MRI, bone scan) and clinical notes detailing the chronicity and hematogenous source.

• Ensure documentation explicitly states "chronic" and "hematogenous" to support this code.
• If the specific bone (radius or ulna) is identified, use a more specific code from the M86.53 series (e.g., M86.531 for radius, M86.532 for ulna).
• Always code any associated infectious organism (e.g., B95-B97) as an additional diagnosis.