Chronic multifocal osteomyelitis, unsp radius and ulna

This code signifies a persistent, widespread infection of the bone marrow and surrounding bone tissue affecting both the radius and ulna, without specifying which arm. It indicates an ongoing inflammatory process that can involve multiple sites within these bones.

Apply this code when documentation clearly states "chronic multifocal osteomyelitis" involving both the radius and ulna, and the specific arm (left or right) is not identified. This diagnosis is typically supported by imaging studies (e.g., X-ray, MRI, bone scan) showing multifocal involvement, along with clinical signs and symptoms of chronic infection.

• Ensure documentation specifies "chronic" and "multifocal" involvement of both the radius and ulna.
• Avoid using this code if the laterality (left or right arm) is documented; instead, select a more specific code.
• Do not use for acute osteomyelitis; differentiate between acute and chronic forms based on clinical presentation and duration.