Rheumatoid arthritis w/o rheumatoid factor, unsp shoulder

This code signifies a diagnosis of rheumatoid arthritis affecting an unspecified shoulder joint, where laboratory tests for rheumatoid factor (RF) are negative or not performed. It indicates a seronegative form of rheumatoid arthritis impacting the shoulder, without further specification of laterality.

Use this code when a patient presents with clinical signs and symptoms of rheumatoid arthritis localized to the shoulder, and serological testing for rheumatoid factor is documented as negative or not available. It is appropriate when the medical record does not specify whether the left or right shoulder is affected.

• Ensure documentation clearly states "seronegative" or "rheumatoid factor negative" for rheumatoid arthritis.
• Avoid using this code if laterality (left or right shoulder) is specified; instead, use the more specific codes for left or right shoulder involvement.
• Do not use this code if the patient is documented with positive rheumatoid factor; refer to codes for seropositive rheumatoid arthritis.