Rheumatoid nodule, right ankle and foot

This code signifies the presence of a rheumatoid nodule affecting the right ankle and/or foot. These subcutaneous nodules are a characteristic extra-articular manifestation of rheumatoid arthritis, typically firm and non-tender. Their presence indicates active or chronic inflammatory disease.

Apply this code when documentation explicitly states a rheumatoid nodule is present on the patient's right ankle or foot. This often occurs in patients with a confirmed diagnosis of rheumatoid arthritis. Supporting documentation should include physical exam findings or imaging reports confirming the nodule's location.

• Ensure laterality is clearly documented as "right" for the ankle/foot.
• Always code the underlying rheumatoid arthritis (e.g., M05.xx or M06.xx) as the primary diagnosis, with this code as a secondary manifestation.
• Do not use this code for other types of nodules (e.g., gouty tophi, ganglion cysts) that are not specifically identified as rheumatoid.