ICD-10 Code M02.242 – Postimmunization arthropathy, left hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.242 – Postimmunization arthropathy, left hand
What it is
This code identifies joint inflammation in the left hand that occurs after immunization. Use it when the record links the arthropathy to a vaccine reaction and specifies the left hand.
Clinical signs
Findings may include pain, swelling, stiffness, and reduced motion in the left hand joints. Clinical features vary; refer to documentation for the postimmunization link and the affected site.
When to use this code
Use M02.242 when the provider documents postimmunization arthropathy involving the left hand. Code it only when the causal relationship to immunization is stated or clearly supported in the chart.
If the record names another joint, a different laterality, or does not connect the arthritis to immunization, you should not assign this code. Check documentation for the exact site and cause.
Do not use for
Do not use it for nonspecific hand pain, traumatic arthritis, or inflammatory arthritis without a postimmunization cause. Do not assign it if the affected hand is not the left hand.
Coding tip
Verify both the vaccine-related cause and left-hand laterality before coding.