ICD-10 Code M02.329 – Reiter’s disease, unspecified elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.329 – Reiter’s disease, unspecified elbow
What it is
M02.329 identifies reactive arthritis, also called Reiter’s disease, affecting the elbow without a more specific side designation. It signals an inflammatory joint condition linked to a prior infection, but the record does not specify right or left elbow.
Clinical signs
You may see elbow pain, swelling, warmth, and reduced range of motion. Clinical features vary; refer to documentation for the infectious trigger and whether other joints or classic extra-articular findings are present.
When to use this code
Use this code when the provider documents Reiter’s disease or reactive arthritis involving the elbow and does not identify the affected side. It is appropriate when the elbow is the coded joint and the note supports an inflammatory post-infectious arthritis. Check documentation if the record only says arthritis, arthralgia, or joint pain.
Do not use for
Do not use it for traumatic elbow pain, osteoarthritis, or rheumatoid arthritis. If the provider specifies a different joint, laterality, or a more specific reactive arthritis code, code that instead.
Coding tip
Confirm both the diagnosis and the elbow laterality in the note before assigning M02.329.