Rheumatoid arthritis w/o rheumatoid factor, left shoulder

This code signifies a chronic inflammatory autoimmune disease primarily affecting the synovial lining of joints, specifically the left shoulder, in the absence of detectable rheumatoid factor antibodies in the patient's blood. This seronegative form of rheumatoid arthritis can lead to joint pain, swelling, stiffness, and potential joint destruction.

Apply this code when documentation explicitly states a diagnosis of rheumatoid arthritis, specifies the left shoulder as the affected joint, and indicates that rheumatoid factor testing was negative or that the condition is seronegative. This code is appropriate for initial encounters and subsequent follow-up visits for this specific condition.

• Ensure documentation clearly specifies "left shoulder" and "without rheumatoid factor" or "seronegative."
• Do not confuse with seropositive rheumatoid arthritis (M05.-) or other forms of inflammatory arthropathy.
• Consider an additional code for any associated systemic manifestations or complications if documented.