ICD-10 Code M05.7A – Rheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.7A – Rheumatoid arthritis with rheumatoid factor of other specified site without organ or systems involvement
What it is
This code identifies rheumatoid arthritis that is rheumatoid factor positive and affects a specified site other than the common joints named elsewhere. It also indicates no documented organ or system involvement.
Clinical signs
Expect inflammatory joint symptoms such as pain, swelling, stiffness, and reduced motion in the documented site. Clinical features vary; refer to documentation for the exact location and whether rheumatoid factor positivity is confirmed.
When to use this code
Use this code when the record clearly states rheumatoid arthritis with rheumatoid factor positivity at another specified site, and the provider documents no organ or system involvement. It is appropriate when the affected site is named in the chart and the diagnosis is active. If the site is not specified, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis without rheumatoid factor, or when organ or system involvement is documented. It is also not the right choice if the site is unspecified or the record supports a different rheumatoid arthritis type.
Coding tip
Confirm both the rheumatoid factor status and the exact anatomic site before assigning M05.7A.