Subacute osteomyelitis, right humerus

This code signifies an inflammatory condition of the bone and bone marrow in the right upper arm that has progressed beyond an acute phase but has not yet become chronic. It indicates an infection of the right humerus that is persistent or recurrent over weeks to months, often characterized by less severe systemic symptoms than acute osteomyelitis.

Use this code when documentation specifies subacute osteomyelitis affecting the right humerus. This typically applies to patients presenting with localized pain, swelling, and tenderness in the right upper arm, along with imaging (e.g., X-ray, MRI) and laboratory findings (e.g., elevated ESR, CRP) consistent with a subacute bone infection. Documentation should clearly state the subacute nature and laterality.

• Ensure the documentation explicitly states "subacute" and specifies the "right humerus" to accurately assign this code.
• Differentiate from acute osteomyelitis (M86.1-) and chronic osteomyelitis (M86.3-), as the stage of the infection impacts code selection.
• Always code any associated infectious agent (e.g., B95-B97) as an additional diagnosis, if identified and documented.