T78.07XA Anaphylactic reaction due to milk and dairy products, initial encounter

ICD-10-CM T78.07XA: Anaphylactic reaction due to milk and dairy products, initial encounter

ICD-10-CM code T78.07XA identifies an initial encounter for an anaphylactic reaction due to milk and dairy products. Milk is recognized as a common food allergen that may trigger life-threatening anaphylaxis. This reference outlines code-specific details and clinical context supported by public sources. 1 5

Plain-language overview

Food allergies represent a significant public health concern affecting millions worldwide, with reactions ranging from mild symptoms to life-threatening anaphylaxis triggered by common allergens such as milk. 1

Cow's milk allergy is an allergic reaction to the protein found in cow's milk, and primary clinicians educate parents that this allergy can constitute a medical emergency. 2

What this code represents

The official display label for T78.07XA is anaphylactic reaction due to milk and dairy products, initial encounter, distinguishing it from the subsequent encounter code T78.07XD. 5

Code T78.07XA is distinct from T78.07XD, which designates a subsequent encounter for an anaphylactic reaction due to milk and dairy products, whereas T78.07XA specifies the initial encounter. 5

Coding details

Code T78.07XA appears in a list of specific anaphylactic reaction codes that includes T78.07XD for subsequent encounters and T78.07XS for sequela, establishing its place within a broader encounter-specific coding framework. 4 5

Documentation considerations

When a food allergy is suspected based on a reaction, the clinical history details the exposure and characterizes the timing and nature of the symptoms. 1

Clinicians assess for contributing factors, such as physical exertion, medications, alcohol intake, or underlying medical conditions, that may have influenced the allergic reaction. 1

What the sources add

While clinical sources detail milk allergy reactions and emergency epinephrine administration, payer articles provide the specific T78.07XA code designation and its subsequent encounter counterpart for billing and coding purposes. 2 5

Cow's milk allergy reactions classify into rapid onset, usually IgE mediated, where symptoms occur within an hour after ingestion, and slow onset, non-IgE mediated, where symptoms take hours or days to present. 2

Sources

1. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Fast Facts: Products That May Contain Alpha-gal — cdc.gov; accessed 2026-07-27.
4. Phecode 930 · Cancer PRSweb — csg.sph.umich.edu; accessed 2026-07-27.
5. Article - Billing and Coding: Allergy Testing (A57531) — cms.gov; accessed 2026-07-27.