Rheumatoid bursitis, unspecified ankle and foot

This code signifies inflammation of a bursa in the ankle or foot region, specifically caused by rheumatoid arthritis. It indicates a localized manifestation of rheumatoid disease affecting the synovial sacs that cushion tendons and bones in the lower extremity.

Apply this code when documentation clearly states "rheumatoid bursitis" affecting an unspecified ankle or foot. This diagnosis is appropriate when the laterality (left or right) is not specified in the medical record.

• Ensure the documentation explicitly links the bursitis to rheumatoid arthritis; otherwise, a non-rheumatoid bursitis code would be more appropriate.
• Avoid using this code if the laterality (left or right ankle/foot) is documented; instead, select the more specific M06.271 or M06.272.
• Always sequence this code after the primary rheumatoid arthritis diagnosis (e.g., M05.xx or M06.xx) if the rheumatoid arthritis is active and being treated.