ICD-10 Code M02.331 – Reiter’s disease, right wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.331 – Reiter’s disease, right wrist
What it is
This code identifies reactive arthritis, historically called Reiter’s disease, affecting the right wrist. Use it when the provider documents this specific joint and laterality.
Clinical signs
Clinical features vary; refer to documentation. Common findings include inflammatory joint pain, swelling, warmth, and reduced motion in the affected wrist, often with other reactive arthritis features.
When to use this code
Use M02.331 when the record clearly states Reiter’s disease or reactive arthritis in the right wrist. It is appropriate when the diagnosis is confirmed and laterality is documented.
If the note only says arthritis, wrist pain, or reactive arthritis without side or joint detail, you should not assume this code. Check documentation for the exact anatomic site and laterality.
Do not use for
Do not use this code for left wrist, bilateral wrist, or unspecified wrist disease. Do not use it when the chart documents another type of arthritis or only nonspecific joint pain.
Coding tip
Verify both the diagnosis term and the right-sided wrist location before assigning M02.331.