Secondary osteoarthritis, right ankle and foot

This code identifies degenerative joint disease affecting the right ankle and/or foot, which arises as a consequence of another underlying condition or injury. Unlike primary osteoarthritis, secondary osteoarthritis is attributable to an identifiable cause such as trauma, infection, or a systemic disease. It involves the breakdown of cartilage and bone changes within the joint.

Apply this code when documentation clearly indicates osteoarthritis in the right ankle and/or foot that is secondary to a specific etiology. This includes conditions like post-traumatic arthritis, inflammatory arthropathies, or metabolic disorders leading to joint degeneration. Supporting documentation should specify the secondary nature of the osteoarthritis and the affected joint(s).

• Always code the underlying cause of the secondary osteoarthritis first, if known and applicable, followed by this code.
• Distinguish carefully between primary (idiopathic) and secondary osteoarthritis; documentation must explicitly state "secondary" or provide a clear causative factor.
• Ensure laterality is accurately captured; this code is specific to the right ankle and foot.