ICD-10 Code M06.072 – Rheumatoid arthritis without rheumatoid factor, left ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.072 – Rheumatoid arthritis without rheumatoid factor, left ankle and foot
What it is
This code identifies rheumatoid arthritis that does not have a detectable rheumatoid factor and specifically affects the left ankle and foot. Use it when the record documents this joint location and seronegative status.
Clinical signs
Typical findings include inflammatory joint pain, swelling, stiffness, and reduced motion in the left ankle or foot. Clinical features vary; refer to documentation for confirmed seronegative rheumatoid arthritis.
When to use this code
Use M06.072 when the provider documents rheumatoid arthritis without rheumatoid factor in the left ankle and foot. Apply it when the condition is clearly localized to that side and joint region. Check documentation if laterality, serology, or joint involvement is unclear.
Do not use for
Do not use this code for rheumatoid arthritis with rheumatoid factor, unspecified laterality, or involvement of another joint. Do not use it when the chart does not confirm the left ankle and foot.
Coding tip
Verify both the serologic status and the exact anatomic site before assigning M06.072.