Exposure to other ionizing radiation, subsequent encounter

This code signifies a patient's exposure to ionizing radiation from sources other than medical diagnostic or therapeutic procedures, or nuclear weapons, during a subsequent encounter for care. It indicates that the patient is being seen for ongoing assessment or treatment related to a past exposure event.

Use this code when documenting follow-up care for individuals who have been exposed to environmental radiation, industrial radiation, or other non-medical sources of ionizing radiation. This includes subsequent visits for monitoring, symptom management, or long-term health surveillance after the initial exposure.

• This code requires a 7th character "D" for subsequent encounter, indicating ongoing care.
• Always sequence this code as a secondary diagnosis, following the code for the specific condition or injury resulting from the radiation exposure.
• Ensure documentation clearly specifies the type of "other" ionizing radiation if known, to support the specificity of this code.