Transient synovitis, unspecified shoulder

This code signifies a temporary, non-infectious inflammation of the synovial membrane lining the shoulder joint. It presents as acute joint pain and swelling without evidence of infection or chronic arthropathy. The condition is self-limiting and typically resolves within a few weeks.

Apply this code when documentation indicates a diagnosis of transient synovitis affecting an unspecified shoulder. This diagnosis is often made after ruling out other causes of acute shoulder pain, such as trauma, infection, or inflammatory arthritis. Supporting documentation should describe acute onset of shoulder pain, limited range of motion, and absence of systemic symptoms or chronic joint disease.

• Ensure documentation specifies "transient" or "acute non-specific" synovitis to differentiate from chronic or infectious forms.
• Avoid using this code if a more specific cause of synovitis (e.g., traumatic, infectious, or associated with a systemic disease) is identified.
• If the laterality of the shoulder is known (left or right), use the more specific codes for transient synovitis of the left (M67.312) or right (M67.311) shoulder.