ICD-10 Code M05.15 – Rheumatoid lung disease with rheumatoid arthritis of hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.15 – Rheumatoid lung disease with rheumatoid arthritis of hip
What it is
This code identifies rheumatoid arthritis affecting the hip together with rheumatoid lung disease. Use it when the record links both conditions as part of the same rheumatoid disease process.
Clinical signs
Findings may include hip pain, stiffness, reduced range of motion, and documented pulmonary involvement such as interstitial lung disease or other rheumatoid lung manifestations. Clinical features vary; refer to documentation.
When to use this code
Use M05.15 when the provider clearly documents rheumatoid lung disease and rheumatoid arthritis of the hip. The note should show that the lung disease is associated with rheumatoid arthritis, not a separate pulmonary disorder.
Choose this code for confirmed rheumatoid involvement of the hip, including unilateral or bilateral hip disease when documented under this category. Check documentation if the laterality or pulmonary association is unclear.
Do not use for
Do not use this code for rheumatoid arthritis without lung involvement, or for lung disease not linked to rheumatoid arthritis. Check documentation.
Coding tip
Verify both the rheumatoid lung diagnosis and hip involvement in the same encounter note before assigning M05.15.