Exposure to excessive natural heat

**Inclusion terms:** - 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 note:** - The appropriate 7th character is to be added to code X30

**7th character:** - A: initial encounter - D: subsequent encounter - S: sequela