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ICD-10-CM 2027

ICD-10 code for radiation

Choose a code from the options below based on the documentation.

From the official ICD-10-CM alphabetic index entry “Radiation”. Page updated September 29, 2026.

About coding radiation

The official ICD-10-CM index doesn't give a single default code for radiation; the code depends on the details below.

More specific radiation codes (official index)

  • burn
  • effects NOS T66 — Radiation sickness, unspecified
  • sickness NOS T66 — Radiation sickness, unspecified
  • therapy, encounter for Z51.0 — Encounter for antineoplastic radiation therapy

Common questions about radiation ICD-10 codes

What is the ICD-10 code for effects nos radiation?

T66 — Radiation sickness, unspecified (header code; choose a more specific subcode).

What is the ICD-10 code for sickness nos radiation?

T66 — Radiation sickness, unspecified (header code; choose a more specific subcode).