Excludes1 pair
T67.3- vs T67.4-
T67.3 and T67.4 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on T67.3
heat exhaustion due to salt depletion (T67.4)
T67.3
Heat exhaustion, anhydrotic
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- T66-T78
Use when the record says
- Heat prostration due to water depletion
Indexed under
- Heat › exhaustion › anhydrotic
- Prostration › heat › anhydrotic
- Exhaustion, exhaustive › heat › due to › water depletion
- Heat › exhaustion › due to › water depletion
- Prostration › heat › due to › water depletion
T67.4
Heat exhaustion due to salt depletion
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- T66-T78
Use when the record says
- Heat prostration due to salt (and water) depletion
Indexed under
- Depletion › salt or sodium › causing heat exhaustion or prostration
- Exhaustion, exhaustive › heat › due to › salt depletion
- Heat › exhaustion › due to › salt depletion (and water)
- Prostration › heat › due to › salt depletion (and water)
- Heat › exhaustion › due to › water depletion › with salt depletion
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027