ICD-10 Code M02.319 – Reiter’s disease, unspecified shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.319 – Reiter’s disease, unspecified shoulder
What it is
This code identifies reactive arthritis, historically called Reiter’s disease, affecting the shoulder when the side is not specified. It is used when documentation names the condition but does not identify left or right shoulder.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include inflammatory joint pain, swelling, stiffness, and reduced shoulder motion in the setting of reactive arthritis.
When to use this code
Use this code when the record clearly documents Reiter’s disease or reactive arthritis involving the shoulder, but laterality is not stated. You should also use it when the provider specifies shoulder involvement without naming left or right. If the note is ambiguous, check documentation before assigning the code.
Do not use for
Do not use this code for shoulder pain or arthritis without documentation of reactive arthritis. Do not use it when the record specifies a different shoulder laterality code.
Coding tip
Confirm both the diagnosis and the shoulder laterality in the provider note before coding.