Erosive (osteo)arthritis

This code represents a specific form of osteoarthritis characterized by significant cartilage loss and subchondral bone erosion, often presenting with an inflammatory component. It is a more aggressive and destructive variant of osteoarthritis, primarily affecting the interphalangeal joints of the hands.

Use this code when documentation explicitly states "erosive osteoarthritis" or "erosive arthritis" in the context of degenerative joint disease. This diagnosis is typically supported by radiographic findings showing central erosions and "gull-wing" deformities, along with clinical signs of inflammation.

• Differentiate from typical osteoarthritis (M19.-) which lacks the erosive component.
• Ensure documentation specifies "erosive" to support this more specific code.
• Consider laterality (e.g., right hand, left hand) if specified in the clinical record.