ICD-10 Code M02.35 – Reiter’s disease, hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.35 – Reiter’s disease, hip
What it is
M02.35 identifies Reiter’s disease, also called reactive arthritis, affecting the hip joint. Use it when the record specifies this postinfectious inflammatory arthritis in the hip.
Clinical signs
Typical findings include joint pain, stiffness, swelling, and reduced range of motion in the hip. Clinical features vary; refer to documentation for the specific reactive arthritis presentation.
When to use this code
Use M02.35 when the provider documents Reiter’s disease or reactive arthritis involving the hip. It fits cases where the hip is the coded site and the diagnosis is clearly established in the chart.
Choose this code for confirmed hip involvement, not for vague arthralgia or undifferentiated joint pain. Check documentation if the note does not clearly link the hip findings to reactive arthritis.
Do not use for
Do not use this code for other arthritides, isolated hip pain, or nonspecific inflammatory joint symptoms. Check documentation when the diagnosis or joint site is unclear.
Coding tip
Verify both the reactive arthritis diagnosis and the hip site before assigning M02.35.