T67.3 vs T67.4
T67.3 (Heat exhaustion, anhydrotic) compared with T67.4 (Heat exhaustion due to salt depletion), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. T67.3 carries an Excludes1 note covering T67.4: “heat exhaustion due to salt depletion (T67.4)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| T67.3Heat exhaustion, anhydrotic | T67.4Heat exhaustion due to salt depletion | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Heat exhaustion, anhydrotic is a non-billable ICD-10-CM category code (T67.3). | Heat exhaustion due to salt depletion is a non-billable ICD-10-CM category code (T67.4). |
| 7th character | The appropriate 7th character is to be added to each code from category T67 | The appropriate 7th character is to be added to each code from category T67 |
| Includes | Heat prostration due to water depletion | Heat prostration due to salt (and water) depletion |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources