Rheumatoid nodule, left ankle and foot

This code signifies the presence of a rheumatoid nodule affecting the left ankle and/or foot. These are subcutaneous, firm, non-tender lumps typically found over pressure points in patients with rheumatoid arthritis.

Apply this code when documentation clearly identifies a rheumatoid nodule specifically located on the patient's left ankle or foot. Supporting documentation should include a physician's diagnosis of a rheumatoid nodule and its precise anatomical location.

• Ensure the documentation specifies "left" ankle/foot; laterality is crucial for accurate coding.
• Do not confuse with other types of nodules (e.g., gouty tophi, ganglion cysts) unless explicitly diagnosed as rheumatoid.
• Always sequence this code after the underlying rheumatoid arthritis diagnosis (e.g., M05.xx or M06.xx).