Other hypertrophic osteoarthropathy, right ankle and foot

This diagnosis code signifies a non-inflammatory, degenerative joint disease affecting the right ankle and foot, characterized by abnormal bone overgrowth and soft tissue proliferation. It represents a secondary form of osteoarthropathy, often associated with underlying systemic conditions or chronic diseases.

Assign this code when documentation indicates hypertrophic osteoarthropathy specifically impacting the right ankle and/or foot, and the condition is not primary. This code is appropriate when the physician's notes describe clubbing, periostosis, and arthralgia in the specified anatomical location, linked to a secondary cause.

• Ensure documentation clearly specifies "right ankle and foot" to support laterality.
• Always sequence an underlying causal condition (e.g., lung cancer, inflammatory bowel disease) before this code, as it represents a secondary manifestation.
• Differentiate from primary osteoarthritis (M19.xx) or other specific arthropathies, as this code implies a hypertrophic, often systemic-related, process.