ICD-10 Code M02.311 – Reiter’s disease, right shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.311 – Reiter’s disease, right shoulder
What it is
This code identifies Reiter’s disease, also called reactive arthritis, affecting the right shoulder. It documents joint inflammation in that specific location, not the underlying trigger.
Clinical signs
Typical findings include shoulder pain, swelling, stiffness, and reduced range of motion. Clinical features vary; refer to documentation for evidence of reactive arthritis or associated joint involvement.
When to use this code
Use M02.311 when the provider documents Reiter’s disease or reactive arthritis limited to the right shoulder. It is appropriate when the record clearly links the diagnosis to that joint. If laterality or the affected joint is not stated, check documentation before assigning the code.
Do not use for
Do not use this code for nonspecific shoulder pain, trauma, or other inflammatory arthropathies without documentation of Reiter’s disease. Do not assume the diagnosis from symptoms alone.
Coding tip
Confirm both the reactive arthritis diagnosis and the right-shoulder laterality in the note before coding.