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T67

T67: Effects of heat and light

Non-billable headerICD-10-CM

T67 is a non-billable header ICD-10-CM code for effects of heat and light. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

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

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • 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, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

Other codes that can never be billed with T67

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • R53.8Other malaise and fatigue
  • R55Syncope and collapse
  • T67.3Heat exhaustion, anhydrotic
  • T67.3XXAHeat exhaustion, anhydrotic, initial encounter
  • T67.3XXDHeat exhaustion, anhydrotic, subsequent encounter
  • T67.3XXSHeat exhaustion, anhydrotic, sequela

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead T67

10 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.