ICD-10 Code M05.13 – Rheumatoid lung disease with rheumatoid arthritis of wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.13 – Rheumatoid lung disease with rheumatoid arthritis of wrist
What it is
This code identifies rheumatoid arthritis affecting the wrist with associated rheumatoid lung disease. Use it when the record links both the joint disease and pulmonary involvement to rheumatoid arthritis.
Clinical signs
Findings may include chronic wrist pain, swelling, stiffness, and reduced range of motion, along with lung manifestations such as cough, dyspnea, or interstitial lung disease. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid arthritis of the wrist and specifically states rheumatoid lung disease. The pulmonary condition must be clinically connected to the rheumatoid arthritis, not listed as an unrelated lung disorder. Check documentation if the site or lung involvement is unclear.
Do not use for
Do not use this code if rheumatoid lung disease is not documented, or if the wrist arthritis is not specified as rheumatoid arthritis. Avoid it for other inflammatory arthropathies or nonspecific lung disease without a documented rheumatoid link.
Coding tip
Confirm both the joint site and lung involvement are documented together before assigning M05.13.