Other chronic osteomyelitis, left humerus

This code signifies a persistent, long-standing infection of the bone in the left upper arm (humerus) that is not acute. It indicates an inflammatory process within the bone tissue, often characterized by periods of exacerbation and remission, and can result from inadequately treated acute osteomyelitis or open fractures.

Use this code for patients diagnosed with chronic osteomyelitis affecting the left humerus, where the infection has been present for an extended period. Documentation should clearly state "chronic osteomyelitis" and specify the left humerus as the affected site, often noting the absence of acute symptoms or a history of prior infection.

• Ensure documentation differentiates between acute and chronic osteomyelitis; if acute, a different code from the M86.0-M86.1 series would be appropriate.
• Verify laterality (left humerus) is explicitly stated in the medical record to avoid coding errors.
• Consider any associated conditions, such as a draining sinus or sequestrum, which may require additional codes.