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ICD-10-CM 2027 diagnosis code

T67.8Other effects of heat and light

Not billable — use a more specific codeRequires 7th character

T67.8 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T67.8

T67.8 is the ICD-10-CM diagnosis code for other effects of heat and light. It belongs to category T67 (effects of heat and light), 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 3 subcodes must be used instead.

Within T67, choose T67.8 (Other effects of heat and light) only when documentation doesn't support a more specific option: heatstroke and sunstroke (T67.0), heat syncope (T67.1), heat cramp (T67.2), heat exhaustion, anhydrotic (T67.3), heat exhaustion due to salt depletion (T67.4), heat exhaustion, unspecified (T67.5), heat fatigue, transient (T67.6), heat edema (T67.7) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

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

7th character

The appropriate 7th character is to be added to each code from category T67

Notes that apply from higher levels

Instructions written at a parent level also apply to T67.8.

› From T67 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

Broader instructions also apply from T66-T78 Other and unspecified effects of external causes and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to T67.8.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T67.8

Is T67.8 billable?

No. T67.8 is a header code. Report one of its more specific subcodes instead.