Monoarthritis, not elsewhere classified, unsp shoulder

This code signifies inflammation affecting a single, unspecified shoulder joint, not attributable to other specific arthritic conditions. It represents a localized inflammatory process within the shoulder, without further specification of the underlying etiology.

Apply this code when documentation clearly indicates monoarthritis of the shoulder, and the specific cause (e.g., rheumatoid, psoriatic, infectious) is unknown or not documented. This is appropriate for initial evaluations where a definitive diagnosis is pending or when the etiology remains undiagnosed after workup.

• Ensure documentation explicitly states "monoarthritis" and specifies the "shoulder" as the affected joint.
• Avoid using this code if a more specific type of arthritis (e.g., M05.xx for rheumatoid arthritis) is identified.
• Always seek clarification from the provider if the documentation suggests a specific etiology but lacks a definitive diagnosis.