T78.0 vs T78.2XXD
T78.0 (Anaphylactic reaction due to food) compared with T78.2XXD (Anaphylactic shock, unspecified, subsequent encounter), 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. T78.2XXD carries an Excludes1 note covering T78.0: “anaphylactic reaction or shock due to adverse food reaction (T78.0-)”
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
| T78.0Anaphylactic reaction due to food | T78.2XXDAnaphylactic shock, unspecified, subsequent encounter | |
|---|---|---|
| Billing status | Non-billable header Report instead: T78.00XA, T78.00XD, T78.00XS, T78.01XA, T78.01XD | 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 | Anaphylactic reaction due to food is a non-billable ICD-10-CM category code (T78.0). | Anaphylactic shock, unspecified, subsequent encounter is a billable ICD-10-CM diagnosis code (T78.2D). |
| 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 T78 |
| Includes | Anaphylactic reaction due to adverse food reaction Anaphylactic shock or reaction due to nonpoisonous foods Anaphylactoid reaction due to food | Allergic shock Anaphylactic reaction Anaphylaxis |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources