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ICD-10-CM category T67: Effects of heat and light

Category T67 is a heading in chapter 19 (Injury, poisoning and certain other consequences of external causes (S00-T88)), section Other and unspecified effects of external causes (T66-T78). It is not billable; report one of the 36 complete codes below.

Notes that apply to every T67 code

Excludes1 (never coded together)
  • 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 (not part of this condition, may be coded together)
  • burns (T20-T31)
  • sunburn (L55.-)
  • sweat disorder due to heat (L74-L75)

Billable codes in T67

Billable FY2027 ICD-10-CM codes in category T67
CodeDescription
T67.01XAHeatstroke and sunstroke, initial encounter
T67.01XDHeatstroke and sunstroke, subsequent encounter
T67.01XSHeatstroke and sunstroke, sequela
T67.02XAExertional heatstroke, initial encounter
T67.02XDExertional heatstroke, subsequent encounter
T67.02XSExertional heatstroke, sequela
T67.09XAOther heatstroke and sunstroke, initial encounter
T67.09XDOther heatstroke and sunstroke, subsequent encounter
T67.09XSOther heatstroke and sunstroke, sequela
T67.1XXAHeat syncope, initial encounter
T67.1XXDHeat syncope, subsequent encounter
T67.1XXSHeat syncope, sequela
T67.2XXAHeat cramp, initial encounter
T67.2XXDHeat cramp, subsequent encounter
T67.2XXSHeat cramp, sequela
T67.3XXAHeat exhaustion, anhydrotic, initial encounter
T67.3XXDHeat exhaustion, anhydrotic, subsequent encounter
T67.3XXSHeat exhaustion, anhydrotic, sequela
T67.4XXAHeat exhaustion due to salt depletion, initial encounter
T67.4XXDHeat exhaustion due to salt depletion, subsequent encounter
T67.4XXSHeat exhaustion due to salt depletion, sequela
T67.5XXAHeat exhaustion, unspecified, initial encounter
T67.5XXDHeat exhaustion, unspecified, subsequent encounter
T67.5XXSHeat exhaustion, unspecified, sequela
T67.6XXAHeat fatigue, transient, initial encounter
T67.6XXDHeat fatigue, transient, subsequent encounter
T67.6XXSHeat fatigue, transient, sequela
T67.7XXAHeat edema, initial encounter
T67.7XXDHeat edema, subsequent encounter
T67.7XXSHeat edema, sequela
T67.8XXAOther effects of heat and light, initial encounter
T67.8XXDOther effects of heat and light, subsequent encounter
T67.8XXSOther effects of heat and light, sequela
T67.9XXAEffect of heat and light, unspecified, initial encounter
T67.9XXDEffect of heat and light, unspecified, subsequent encounter
T67.9XXSEffect of heat and light, unspecified, sequela

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.