ICD-10-CM > S00-T88 > T66-T78 > T66 T66 Radiation sickness, unspecified Non-Billable/Non-Specific Type 1 Excludes 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.-) Codes T66XXXA..., initial encounterT66XXXD..., subsequent encounterT66XXXS..., sequela