T66 Radiation sickness, unspecified

Category / Non-billable header

Block: Other and unspecified effects of external causes (T66-T78)

Excludes 1 (cannot be coded together)

  • specified adverse effects of radiation, such as:
  • burns (T20-T31)
  • leukemia (C91-C95)
  • radiation gastroenteritis and colitis (K52.0)
  • radiation pneumonitis (J70.0)
  • radiation related disorders of the skin and subcutaneous tissue (L55-L59)
  • sunburn (L55.-)

Last reviewed: September 2026