Effects of heat and light Excludes1erythema [dermatitis] ab igne (L59.0)malignant hyperpyrexia due to anesthesia (T88.3)radiation-related disorders of the skin and subcutaneous tissue (L55-L59)Excludes2burns (T20-T31)sunburn (L55.-)sweat disorder due to heat (L74-L75)The appropriate 7th character is to be added to each code from category T67A - initial encounterD - subsequent encounterS - sequela