Subacute osteomyelitis, right shoulder

This code signifies an inflammatory condition of the bone and bone marrow in the right shoulder, characterized by a gradual onset and progression over weeks to months. It indicates an infection that is less acute than sudden-onset osteomyelitis but has not yet become chronic.

Apply this code when documentation specifies osteomyelitis of the right shoulder with a subacute presentation. Supporting documentation should include clinical findings consistent with an infection of intermediate duration, such as persistent pain, swelling, and possibly fever, along with imaging (e.g., MRI, bone scan) or laboratory results (e.g., elevated ESR, CRP) confirming osteomyelitis.

• Ensure the documentation clearly specifies "subacute" and the "right shoulder" to avoid miscoding.
• Differentiate from acute osteomyelitis (M86.1-) and chronic osteomyelitis (M86.3-), which have distinct clinical presentations and coding.
• Always code any associated infectious organism (e.g., B95-B97) as an additional diagnosis, if identified.