ICD-10 Code M06.08 – Rheumatoid arthritis without rheumatoid factor, vertebrae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.08 – Rheumatoid arthritis without rheumatoid factor, vertebrae
What it is
This code identifies rheumatoid arthritis affecting the vertebrae when rheumatoid factor is not present. Use it for documented seronegative rheumatoid involvement of the spinal joints.
Clinical signs
Clinical features vary; refer to documentation. Findings may include inflammatory spinal pain, stiffness, and imaging or exam evidence of vertebral joint involvement consistent with rheumatoid arthritis.
When to use this code
Use M06.08 when the record specifically documents rheumatoid arthritis without rheumatoid factor in the vertebrae. It supports coding of spinal involvement rather than peripheral joint disease. If the provider does not specify vertebral involvement or seronegativity, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis with rheumatoid factor, or for nonspecific back pain alone. Also avoid it when vertebral disease is due to another inflammatory or degenerative condition.
Coding tip
Assign this code only when both the seronegative status and vertebral location are clearly documented.