Primary osteoarthritis, right ankle and foot

This code signifies the presence of primary osteoarthritis affecting the joints of the right ankle and/or foot. It indicates degenerative joint disease that is not secondary to trauma, infection, or another underlying condition. The condition is characterized by cartilage breakdown, bone spur formation, and joint pain in the specified anatomical region.

Use this code when documentation explicitly states a diagnosis of primary osteoarthritis localized to the right ankle and/or foot. This typically applies to patients presenting with chronic joint pain, stiffness, and reduced range of motion in the absence of a clear inciting event. Supporting documentation should include physician notes detailing the diagnosis, laterality, and the primary nature of the osteoarthritis.

• Ensure documentation specifies "primary" osteoarthritis; otherwise, consider codes for secondary osteoarthritis.
• Verify laterality (right) is clearly documented. If bilateral, a separate code for the left ankle/foot would also be assigned.
• Do not use this code for osteoarthritis due to trauma; instead, refer to codes for post-traumatic osteoarthritis.