Effects of heat and light

**Excludes1:** - erythema [dermatitis] ab igne (L59.0) - malignant hyperpyrexia due to anesthesia (T88.3) - radiation-related disorders of the skin and subcutaneous tissue (L55-L59)

**Excludes2:** - burns (T20-T31) - sunburn (L55.-) - sweat disorder due to heat (L74-L75)

**7th character note:** - The appropriate 7th character is to be added to each code from category T67

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