ICD-10 Code M02.279 – Postimmunization arthropathy, unspecified ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.279 – Postimmunization arthropathy, unspecified ankle and foot
What it is
M02.279 identifies joint inflammation in the ankle or foot that is documented as occurring after immunization, but the specific joint is not named. Use this code when the record links the arthropathy to vaccination and no better detail is available.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include joint pain, swelling, stiffness, or reduced range of motion in the ankle or foot after immunization.
When to use this code
Use M02.279 when the provider documents postimmunization arthropathy affecting an unspecified ankle or foot joint. It is appropriate when the vaccine relationship is stated and the record does not identify a more specific joint or alternate diagnosis. Check documentation if the cause is unclear.
Do not use for
Do not use this code for nonspecific post-vaccine pain without arthropathy, or for arthritis with a different documented cause. If the ankle or foot joint is specified, choose the more precise code.
Coding tip
Code the condition exactly as documented and confirm the postimmunization link is explicit in the note.