ICD-10 Code M06.041 – Rheumatoid arthritis without rheumatoid factor, right hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.041 – Rheumatoid arthritis without rheumatoid factor, right hand
What it is
This code identifies rheumatoid arthritis affecting the right hand when rheumatoid factor is not present. Use it for a documented rheumatoid arthritis diagnosis with right-hand involvement and negative or absent rheumatoid factor.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced hand function. Clinical features vary; refer to documentation for the specific joints involved and the serologic status.
When to use this code
Use M06.041 when the provider documents rheumatoid arthritis without rheumatoid factor and clearly identifies the right hand as the affected site. This supports laterality-specific coding for hand involvement. If the record only says rheumatoid arthritis without site detail, check documentation before assigning this code.
Do not use for
Do not use this code for rheumatoid arthritis with positive rheumatoid factor, or when the affected side is not the right hand. Do not use it if the diagnosis is uncertain or if documentation does not support rheumatoid arthritis.
Coding tip
Verify both serology status and laterality in the provider note before coding.