Rheumatoid nodule, unspecified hip

This code signifies the presence of a rheumatoid nodule affecting an unspecified hip joint. Rheumatoid nodules are firm, non-tender subcutaneous lumps that are a common extra-articular manifestation of rheumatoid arthritis. They typically form over pressure points or areas of chronic irritation.

Apply this code when documentation confirms a rheumatoid nodule located on the hip, but the specific laterality (right or left) is not specified. This diagnosis is typically made through physical examination and may be supported by imaging studies or biopsy results. Use when the patient has a confirmed diagnosis of rheumatoid arthritis and develops this specific complication.

• Ensure documentation clearly states "rheumatoid nodule" and specifies the hip as the anatomical site.
• If laterality (right or left hip) is documented, use the more specific codes M06.351 or M06.352.
• Always code the underlying rheumatoid arthritis (e.g., M05.xx or M06.xx) as the primary diagnosis, with the nodule as a secondary diagnosis.