T67.4XXA (Heat exhaustion due to salt depletion, initial encounter) compared with T67.4XXS (Heat exhaustion due to salt depletion, sequela), from the official CMS tabular data. T67.4XXA and T67.4XXS code the same injury at a different phase of treatment.
Same underlying diagnosis, different encounter phase.
The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.
Source: ICD-10-CM Official Guidelines, Section I.C.19.a
Same injury, other encounter phase. T67.4XXA and T67.4XXS code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
| T67.4XXAHeat exhaustion due to salt depletion, initial encounter | T67.4XXSHeat exhaustion due to salt depletion, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| 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 due to salt depletion, initial encounter is a billable ICD-10-CM diagnosis code (T67.4A). | Heat exhaustion due to salt depletion, sequela is a billable ICD-10-CM diagnosis code (T67.4S). |
| 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 salt (and 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