ICD-10 Code M02.34 – Reiter’s disease, hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.34 – Reiter’s disease, hand
What it is
M02.34 identifies reactive arthritis, historically called Reiter’s disease, affecting the hand. Use it when the hand joints are involved as part of this post-infectious inflammatory condition.
Clinical signs
Typical findings include painful, swollen, and stiff hand joints with inflammatory arthritis. Clinical features vary; refer to documentation for evidence of reactive arthritis and the specific hand involvement.
When to use this code
Use this code when the provider documents Reiter’s disease or reactive arthritis limited to, or clearly involving, the hand. It fits cases where the hand is the coded site and the diagnosis is confirmed in the record.
If the note only says arthritis without specifying reactive arthritis or hand involvement, check documentation before assigning M02.34. You may need a different code for another joint or a more general diagnosis.
Do not use for
Do not use M02.34 for nonspecific hand pain, osteoarthritis, or rheumatoid arthritis. Check documentation if the record does not clearly support reactive arthritis.
Coding tip
Code the documented site exactly; if the hand is not specified, do not assume M02.34.