T67Effects of heat and light

T67 is the ICD-10-CM diagnosis code for effects of heat and light. It belongs to block T66-T78 (other and unspecified effects of external causes) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T67.0 (sunstroke), T67.1 (syncope), T67.2 (cramp), T67.3 (anhydrotic), T67.4 (depletion), T67.5 (unspecified), T67.6 (transient), T67.7 (edema) and 2 more.

Don't report T67 together with the conditions in its Excludes1 note: erythema [dermatitis] ab igne (L59.0), malignant hyperpyrexia due to anesthesia (T88.3) and radiation-related disorders of the skin and subcutaneous tissue (L55-L59).

The conditions in its Excludes2 note aren't part of T67, but may be coded alongside it if the patient has both: burns (T20-T31), sunburn (L55.-) and sweat disorder due to heat (L74-L75).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.