T78.00XA — Anaphylactic reaction due to unspecified food, initial encounter

T78.00XA

What this code means

An anaphylactic (severe allergic) reaction to an unspecified food, at the first encounter.

Also called: food anaphylaxis, anaphylactic reaction to food.

When this code is used

Used for anaphylactic reaction due to unspecified food, initial encounter.

Where it sits in ICD-10-CM

Code T78.00XA belongs to Chapter 19: Injury, poisoning and certain other consequences of external causes, which covers codes S00–T88 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

• Breathlessness
• Rash

Frequently asked questions

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.

More codes in Chapter 19

S00.93XA — Contusion of unspecified part of head, initial encounterS01.01XA — Laceration without foreign body of scalp, initial encounterS02.2XXA — Fracture of nasal bones, initial encounter for closed fractureS05.01XA — Injury of conjunctiva and corneal abrasion without foreign body, right eye, initial encounterS06.0X0A — Concussion without loss of consciousness, initial encounterS09.90XA — Unspecified injury of head, initial encounter

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