Acute hematogenous osteomyelitis, unspecified ankle and foot

This code signifies an acute bone infection in the ankle or foot that has spread through the bloodstream, without further specification of the exact location within the ankle or foot. It indicates a sudden onset of inflammation and destruction of bone tissue caused by bacterial or fungal pathogens.

Apply this code when documentation clearly states acute hematogenous osteomyelitis affecting the ankle or foot, but does not specify a more precise anatomical site (e.g., talus, calcaneus). Supporting documentation should include clinical findings consistent with acute infection (fever, localized pain, swelling, erythema) and diagnostic confirmation (e.g., positive blood cultures, bone biopsy, imaging).

• Ensure "acute" and "hematogenous" are explicitly documented; otherwise, consider other osteomyelitis codes.
• Avoid using this code if a more specific ankle or foot bone is identified (e.g., M86.071 for right ankle/foot, M86.072 for left ankle/foot, or more specific sub-codes like M86.073 for tarsals).
• Always code the underlying infectious organism if known, as a secondary diagnosis.