ICD-10-CM 2027
ICD-10 code for anaphylactic shock
From the official ICD-10-CM alphabetic index entry “Shock › anaphylactic”. Page updated September 29, 2026.
About coding anaphylactic shock
The ICD-10-CM code for anaphylactic shock is T78.2 (Anaphylactic shock, unspecified). The official index lists 28 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T78.2.
Within T78, choose T78.2 (Anaphylactic shock, unspecified) only when documentation doesn't support a more specific option: anaphylactic reaction due to food (T78.0), other adverse food reactions, not elsewhere classified (T78.1), Angioneurotic edema (T78.3), other and unspecified allergy (T78.4) and other adverse effects, not elsewhere classified (T78.8).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
Don't report T78.2 together with the conditions in its Excludes1 note: anaphylactic reaction or shock due to adverse effect of correct medicinal substance properly administered (T88.6), anaphylactic reaction or shock due to adverse food reaction (T78.0-) and anaphylactic reaction or shock due to serum (T80.5-).
More specific anaphylactic shock codes (official index)
- chemical
- due to drug or medicinal substance
- correct substance properly administered T88.6 — Anaphylactic reaction due to adverse effect of correct drug or medicament properly administered
- overdose or wrong substance given or taken (by accident)
- due to food (nonpoisonous) T78.00 — Anaphylactic reaction due to unspecified food
- additives T78.06 — Anaphylactic reaction due to food additives
- dairy products T78.079 — Anaphylactic reaction due to milk and dairy products, unspecified
- with
- reactivity to baked milk T78.071 — Anaphylactic reaction due to milk and dairy products with reactivity to baked milk
- tolerance to baked milk T78.070 — Anaphylactic reaction due to milk and dairy products with tolerance to baked milk
- eggs T78.089 — Anaphylactic reaction due to eggs, unspecified
- with
- reactivity to baked egg T78.081 — Anaphylactic reaction due to egg with reactivity to baked egg
- tolerance to baked egg T78.080 — Anaphylactic reaction due to egg with tolerance to baked egg
- fish T78.03 — Anaphylactic reaction due to other fish
- shellfish T78.02 — Anaphylactic reaction due to shellfish (crustaceans)
- fruit T78.04 — Anaphylactic reaction due to fruits and vegetables
- milk T78.079 — Anaphylactic reaction due to milk and dairy products, unspecified
- with
- reactivity to baked milk T78.071 — Anaphylactic reaction due to milk and dairy products with reactivity to baked milk
- tolerance to baked milk T78.070 — Anaphylactic reaction due to milk and dairy products with tolerance to baked milk
- nuts T78.05 — Anaphylactic reaction due to tree nuts and seeds
- multiple types T78.05 — Anaphylactic reaction due to tree nuts and seeds
- peanuts T78.01 — Anaphylactic reaction due to peanuts
- peanuts T78.01 — Anaphylactic reaction due to peanuts
- seeds T78.05 — Anaphylactic reaction due to tree nuts and seeds
- specified type NEC T78.09 — Anaphylactic reaction due to other food products
- vegetable T78.04 — Anaphylactic reaction due to fruits and vegetables
- following sting (s)
- immunization T80.52 — Anaphylactic reaction due to vaccination
- serum T80.59 — Anaphylactic reaction due to other serum
- blood and blood products T80.51 — Anaphylactic reaction due to administration of blood and blood products
- immunization T80.52 — Anaphylactic reaction due to vaccination
- specified NEC T80.59 — Anaphylactic reaction due to other serum
- vaccination T80.52 — Anaphylactic reaction due to vaccination
Don't confuse with (Excludes1 for T78.2)
Common questions about anaphylactic shock ICD-10 codes
What is the ICD-10 code for anaphylactic shock?
- T78.2 — Anaphylactic shock, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T88.6, T78.00, T78.06, T78.079 and others below.
What is the ICD-10 code for immunization anaphylactic shock?
- T80.52 — Anaphylactic reaction due to vaccination (header code; choose a more specific subcode).
What is the ICD-10 code for serum anaphylactic shock?
- T80.59 — Anaphylactic reaction due to other serum (header code; choose a more specific subcode).
Is T78.2 billable?
- No. T78.2 is a header code. Report one of its more specific subcodes instead.