Infective myositis, unspecified left arm

This code signifies an inflammatory condition of the skeletal muscle in the left arm caused by an infection, where the specific infectious agent is not identified. It indicates muscle inflammation resulting from bacterial, viral, fungal, or parasitic invasion, affecting the musculature of the patient's left upper extremity.

Apply this code when documentation confirms an infective myositis affecting the left arm, but the causative organism is not specified. This is appropriate when the physician's notes indicate "infective myositis of the left arm" without further microbiological detail.

• Ensure documentation clearly specifies "left arm" as the affected site.
• If the infectious agent is known, a more specific code from M60.0- should be used.
• Consider sequencing this code after a code for the underlying infection if applicable and documented.