ICD-10 Code M06.071 – Rheumatoid arthritis without rheumatoid factor, right ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.071 – Rheumatoid arthritis without rheumatoid factor, right ankle and foot
What it is
This code identifies rheumatoid arthritis affecting the right ankle and foot when rheumatoid factor is not present. Use it for documented seronegative RA limited to, or specifically involving, these right-sided joints.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced motion in the right ankle or foot. Clinical features vary; refer to documentation for evidence of rheumatoid arthritis without rheumatoid factor.
When to use this code
Use this code when the provider documents rheumatoid arthritis without rheumatoid factor and specifies the right ankle and foot. It also fits notes describing seronegative RA with right-sided ankle or foot involvement. If laterality or serologic status is unclear, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis with rheumatoid factor, unspecified laterality, or involvement of a different joint site. Do not assume seronegative disease unless the record supports it.
Coding tip
Confirm both the seronegative status and right-sided joint location before assigning M06.071.