Other myositis, left ankle and foot

This code signifies inflammation of the muscle tissue (myositis) in the left ankle and/or foot, when the specific type of myositis is not otherwise classified. It indicates a non-infectious or non-traumatic inflammatory process affecting the musculature of this lower extremity region.

Apply this code when documentation specifies myositis affecting the left ankle and foot, and the provider has not identified a more specific type (e.g., infectious, toxic, or inclusion body myositis). Supporting documentation should clearly state "myositis of left ankle and foot" and rule out more specific etiologies.

• Ensure laterality is explicitly documented as "left" for the ankle and foot.
• Do not use if a more specific myositis code (e.g., M60.0- for infectious myositis) can be assigned.
• Consider sequencing with codes for underlying conditions or causative agents if known and documented.