Subacute osteomyelitis, multiple sites

This code signifies an inflammatory condition of the bone and bone marrow, specifically subacute osteomyelitis, affecting more than one anatomical location. Subacute osteomyelitis typically presents with symptoms lasting several weeks to months, often less severe than acute forms but without the chronicity of chronic osteomyelitis.

Apply this code when documentation clearly indicates a diagnosis of subacute osteomyelitis impacting multiple bones or bone sites. This diagnosis is often supported by imaging studies (e.g., X-ray, MRI, bone scan) showing characteristic changes, along with clinical findings such as localized pain, swelling, and possibly fever, but without the rapid onset or extensive tissue destruction seen in acute cases.

• Ensure documentation specifies "subacute" and "multiple sites" to accurately assign this code.
• Do not confuse with acute osteomyelitis (M86.1-) or 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.