All ICD10 Codes
T67Not billable, use a more specific code below

Effects of heat and light

In Other and unspecified effects of external causes (T66-T78), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

36 billable codes under T67: 3 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Excludes1: not coded here, use a different code

  • 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 included here, code separately if applicable

Also applies, from Other and unspecified effects of external causes (T66-T78)

These notes sit on T66-T78 and apply to every code under it, including T67.

Code also: add a code for this too, order depends on the encounter

  • if applicable, place of occurrence, such as:
  • highway rest stop (Y92.523)
  • school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
  • service areas as the place of occurrence of the external cause (Y92.52-)
  • single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
  • transport vehicle as the place of occurrence of the external cause (Y92.81-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).

Read Section I.C.19 (page 77)

All codes under T67

T67 can't be used on a claim. Pick a billable code below; grey headings group them.

T67 MS-DRGs

As the principal diagnosis, the billable codes under T67 group to MS-DRG 922, 923, 949, or 950 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to T67

Notes on these codes point to T67.

  • R53.8 Excludes1: exhaustion and fatigue due to heat (T67.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Heat Illness

Your body normally cools itself by sweating. During hot weather, especially when it is very humid, sweating just isn't enough to cool you off. Your body temperature can rise to dangerous levels and you can develop a heat illness.

Read more about heat illness on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.