ICD-10 Code M02.38 – Reiter’s disease, vertebrae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.38 – Reiter’s disease, vertebrae
What it is
M02.38 identifies Reiter’s disease, also called reactive arthritis, affecting the vertebrae. Use it when the provider documents inflammatory joint involvement in the spine linked to this condition.
Clinical signs
Clinical features vary; refer to documentation. Spinal pain, stiffness, and inflammatory back symptoms may be noted, along with other signs of reactive arthritis such as joint swelling or enthesitis.
When to use this code
Use M02.38 when the record clearly states Reiter’s disease or reactive arthritis involving the vertebrae. It is appropriate when the spinal site is documented as affected, not just peripheral joints. Check documentation if the anatomic site is unclear.
Do not use for
Do not use this code for nonspecific back pain, mechanical spine disorders, or reactive arthritis without vertebral involvement. If the provider does not link the condition to the vertebrae, choose a more general code.
Coding tip
Verify both the diagnosis and the spinal site in the note before assigning M02.38.