T67.3XXS — Heat exhaustion, anhydrotic, sequela
T67.3XXS is a billable, specific ICD-10-CM code for heat exhaustion, anhydrotic, sequela. It is valid for submission on a claim.
7th character "S" — sequela
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.
- heat exhaustion due to salt depletion (T67.4)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Heat prostration due to water depletion
Excludes1 inherited from the categories above T67.3XXS
These are not written on T67.3XXS, but they bind it: a note on a category applies to every code beneath it. Billing T67.3XXS with anything listed here is a denial.
Excludes2 inherited from the categories above T67.3XXS
Also inherited, and the opposite of Excludes1: these conditions are not part of T67.3XXS, but a patient can have both, so you may code both.
Other codes that can never be billed with T67.3XXS
These codes carry an Excludes1 note pointing at T67.3XXS. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T67.3XXS alone.
- R53.8Other malaise and fatigue
Risk adjustment
T67.3XXS does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
T67.3XXS is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56612Billing and Coding: CT of the Head
- A57326Billing and Coding: Electrocardiograms
Code history
T67.3XXS has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share T67.3. If T67.3XXS is not quite right, the correct code is usually one of these.
Questions about T67.3XXS
- Is T67.3XXS a billable ICD-10-CM code?
- Yes. T67.3XXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T67.3XXS sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).
- What cannot be coded together with T67.3XXS?
- T67.3XXS carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above T67.3XXS (T67.3, T67) and apply to it just the same.