Infective myositis, unspecified upper arm

This code signifies inflammation of the muscle tissue in the upper arm due to an infectious agent, without further specification of the causative organism. It represents a localized muscle infection that can lead to pain, swelling, and impaired function of the affected limb.

Use this code when documentation indicates infective myositis affecting the upper arm, but the specific infectious agent (e.g., bacterial, viral, fungal) is not identified or documented. This code is appropriate when the physician's diagnosis explicitly states "infective myositis, upper arm" without further detail.

• Do not use if the specific infectious agent is known; instead, code to a more specific myositis code (e.g., M60.00-M60.09 with an additional code for the organism).
• Ensure documentation specifies "upper arm" to differentiate from myositis in other body regions.
• Consider an additional code for any associated abscess (e.g., L02.41-) if present and documented.