ICD-10 Code M02.261 – Postimmunization arthropathy, right knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.261 – Postimmunization arthropathy, right knee
What it is
M02.261 identifies arthropathy affecting the right knee that is attributed to a prior immunization. Use it when documentation links the joint disorder to vaccination rather than to infection, trauma, or another cause.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include right knee joint pain, swelling, stiffness, or reduced range of motion after immunization, with no better alternate explanation noted.
When to use this code
Use this code when the provider documents postimmunization arthropathy involving the right knee and specifies the laterality. It is appropriate for follow-up visits, evaluation of persistent joint symptoms, or problem list updates when the vaccine relationship is established. Check documentation if the cause is uncertain.
Do not use for
Do not use this code for nonspecific knee pain, septic arthritis, or post-vaccination symptoms without documented arthropathy. If the record does not clearly connect the knee condition to immunization, check documentation.
Coding tip
Confirm both the vaccine association and the right-knee laterality before assigning M02.261.