Interstitial myositis, unspecified shoulder

This code signifies an inflammatory condition affecting the muscle tissue of the shoulder, specifically the interstitial connective tissue, without further specification of the exact shoulder involved. It indicates a non-infectious inflammation of the muscle fibers and surrounding connective tissue within the shoulder region.

This code is appropriate when documentation specifies interstitial myositis affecting the shoulder but does not differentiate between the right or left shoulder. It should be used when the physician's diagnosis explicitly states "interstitial myositis, shoulder" without laterality.

• Avoid using this code if laterality (right or left shoulder) is documented; instead, select the more specific M60.111 or M60.112.
• Ensure the documentation clearly supports myositis and not another inflammatory muscle condition like polymyositis or dermatomyositis, which have distinct codes.
• Always review the entire medical record for any indication of laterality before defaulting to the unspecified code.