ICD-10 Code M06 – Other rheumatoid arthritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06 – Other rheumatoid arthritis
What it is
M06 is the ICD-10-CM category for rheumatoid arthritis cases that do not fit a more specific rheumatoid arthritis code. Use it when the record identifies rheumatoid arthritis but does not specify a distinct subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings in rheumatoid arthritis include persistent joint pain, swelling, stiffness, and symmetric small-joint involvement, but the exact pattern must be documented.
When to use this code
Use M06 when the clinician documents rheumatoid arthritis and the chart does not support a more specific code. It may apply when the subtype is not stated, is mixed, or cannot be assigned from the available record.
Check whether the note names a specific rheumatoid arthritis variant, because a more detailed code may be appropriate. Code from the documented diagnosis, not from assumed disease severity or treatment history.
Do not use for
Do not use M06 for osteoarthritis, psoriatic arthritis, gout, or unspecified joint pain. If the documentation names another inflammatory arthritis or a more specific rheumatoid arthritis type, use that code instead.
Coding tip
If the chart says only “RA,” confirm whether the provider meant a specific subtype before assigning M06.