T78.2 vs T79.4
T78.2 (Anaphylactic shock, unspecified) compared with T79.4 (Traumatic shock), 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. T79.4 carries an Excludes1 note covering T78.2: “anaphylactic shock NOS (T78.2)”
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
| T78.2Anaphylactic shock, unspecified | T79.4Traumatic shock | |
|---|---|---|
| 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 | Anaphylactic shock, unspecified is a non-billable ICD-10-CM category code (T78.2). | Traumatic shock is a non-billable ICD-10-CM category code (T79.4). |
| 7th character | The appropriate 7th character is to be added to each code from category T78 | The appropriate 7th character is to be added to each code from category T79 |
| Includes | Allergic shock Anaphylactic reaction Anaphylaxis | Shock (immediate) (delayed) following injury |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources