ICD-10 Code M02.269 – Postimmunization arthropathy, unspecified knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.269 – Postimmunization arthropathy, unspecified knee
What it is
This code identifies joint inflammation or arthropathy affecting an unspecified knee that is documented as occurring after immunization. Use it when the record links the knee condition to a vaccine reaction and does not name a more specific site or type.
Clinical signs
Findings may include knee pain, swelling, stiffness, or reduced motion after vaccination. Clinical features vary; refer to documentation for the exact postimmunization relationship and whether the knee is the only joint involved.
When to use this code
Use M02.269 when the provider documents postimmunization arthropathy in an unspecified knee and no more specific code is available. It also fits cases where the chart clearly connects the knee symptoms to a prior immunization but laterality and additional detail are not recorded. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use this code for routine post-vaccine soreness without a documented arthropathy diagnosis. Do not assign it when the knee condition is due to trauma, infection, or another non-immunization cause.
Coding tip
Verify that the provider explicitly links the knee arthropathy to immunization before you code M02.269.