Chronic multifocal osteomyelitis, right femur

This code signifies a persistent, widespread infection of the bone and bone marrow affecting the right thigh bone. It indicates a long-standing inflammatory process involving multiple distinct areas within the right femur, often characterized by periods of exacerbation and remission.

Apply this code when documentation explicitly states chronic multifocal osteomyelitis localized to the right femur. This diagnosis is typically supported by imaging studies (e.g., X-rays, MRI, bone scans) showing multiple areas of bone destruction and new bone formation, along with clinical signs of chronic infection and potentially positive bone cultures.

• Ensure documentation specifies "chronic" and "multifocal" to differentiate from acute or localized forms.
• Laterality (right femur) must be clearly documented; do not assume.
• Always sequence this code after any underlying systemic condition that may be contributing to the osteomyelitis, if applicable.