Exposure to X-rays, subsequent encounter

This code indicates that a patient is presenting for follow-up care or treatment related to a prior exposure to X-rays. This exposure could have been accidental, occupational, or environmental, and the current encounter addresses the long-term effects or monitoring associated with that initial event.

Use this code when a patient returns for subsequent evaluation of potential radiation-induced conditions, such as dermatological changes, hematological abnormalities, or cancer screening, following a documented X-ray exposure. It is appropriate for ongoing management or surveillance after the initial injury or acute effects have been addressed.

• Always sequence this code after the primary diagnosis describing the specific condition or symptom being treated due to the X-ray exposure.
• Ensure documentation clearly specifies that the encounter is for follow-up or sequelae of a past X-ray exposure, not the initial exposure event.
• Verify the "D" seventh character is appropriate for a subsequent encounter; "A" is for initial, and "S" for sequela.