X30 Exposure to excessive natural heat

Exposure to excessive heat as the cause of sunstroke
Exposure to heat NOS

Excludes1: excessive heat of man-made origin (W92)
exposure to man-made radiation (W89)
exposure to sunlight (X32)
exposure to tanning bed (W89)

7th character: The appropriate 7th character is to be added to code X30
7th character definitions: initial encounter
subsequent encounter
sequela