ICD-10-CM category
T78 Adverse effects, not elsewhere classified
T78 is a category, not a billable code. Report one of the 81 complete codes below.
T78.0…
42 codes
- T78.00XAAnaphylactic reaction due to unspecified food, initial encounter
- T78.00XDAnaphylactic reaction due to unspecified food, subsequent encounter
- T78.00XSAnaphylactic reaction due to unspecified food, sequela
- T78.01XAAnaphylactic reaction due to peanuts, initial encounter
- T78.01XDAnaphylactic reaction due to peanuts, subsequent encounter
- T78.01XSAnaphylactic reaction due to peanuts, sequela
- T78.02XAAnaphylactic reaction due to shellfish (crustaceans), initial encounter
- T78.02XDAnaphylactic reaction due to shellfish (crustaceans), subsequent encounter
- T78.02XSAnaphylactic reaction due to shellfish (crustaceans), sequela
- T78.03XAAnaphylactic reaction due to other fish, initial encounter
- T78.03XDAnaphylactic reaction due to other fish, subsequent encounter
- T78.03XSAnaphylactic reaction due to other fish, sequela
- T78.04XAAnaphylactic reaction due to fruits and vegetables, initial encounter
- T78.04XDAnaphylactic reaction due to fruits and vegetables, subsequent encounter
- T78.04XSAnaphylactic reaction due to fruits and vegetables, sequela
- T78.05XAAnaphylactic reaction due to tree nuts and seeds, initial encounter
- T78.05XDAnaphylactic reaction due to tree nuts and seeds, subsequent encounter
- T78.05XSAnaphylactic reaction due to tree nuts and seeds, sequela
- T78.06XAAnaphylactic reaction due to food additives, initial encounter
- T78.06XDAnaphylactic reaction due to food additives, subsequent encounter
- T78.06XSAnaphylactic reaction due to food additives, sequela
- T78.070AAnaphylactic reaction due to milk and dairy products with tolerance to baked milk, initial encounter
- T78.070DAnaphylactic reaction due to milk and dairy products with tolerance to baked milk, subsequent encounter
- T78.070SAnaphylactic reaction due to milk and dairy products with tolerance to baked milk, sequela
- T78.071AAnaphylactic reaction due to milk and dairy products with reactivity to baked milk, initial encounter
- T78.071DAnaphylactic reaction due to milk and dairy products with reactivity to baked milk, subsequent encounter
- T78.071SAnaphylactic reaction due to milk and dairy products with reactivity to baked milk, sequela
- T78.079AAnaphylactic reaction due to milk and dairy products, unspecified, initial encounter
- T78.079DAnaphylactic reaction due to milk and dairy products, unspecified, subsequent encounter
- T78.079SAnaphylactic reaction due to milk and dairy products, unspecified, sequela
- T78.080AAnaphylactic reaction due to egg with tolerance to baked egg, initial encounter
- T78.080DAnaphylactic reaction due to egg with tolerance to baked egg, subsequent encounter
- T78.080SAnaphylactic reaction due to egg with tolerance to baked egg, sequela
- T78.081AAnaphylactic reaction due to egg with reactivity to baked egg, initial encounter
- T78.081DAnaphylactic reaction due to egg with reactivity to baked egg, subsequent encounter
- T78.081SAnaphylactic reaction due to egg with reactivity to baked egg, sequela
- T78.089AAnaphylactic reaction due to eggs, unspecified, initial encounter
- T78.089DAnaphylactic reaction due to eggs, unspecified, subsequent encounter
- T78.089SAnaphylactic reaction due to eggs, unspecified, sequela
- T78.09XAAnaphylactic reaction due to other food products, initial encounter
- T78.09XDAnaphylactic reaction due to other food products, subsequent encounter
- T78.09XSAnaphylactic reaction due to other food products, sequela
T78.1…
21 codes
- T78.110AOther adverse food reactions due to milk and dairy products with tolerance to baked milk, initial encounter
- T78.110DOther adverse food reactions due to milk and dairy products with tolerance to baked milk, subsequent encounter
- T78.110SOther adverse food reactions due to milk and dairy products with tolerance to baked milk, sequela
- T78.111AOther adverse food reaction due to milk and dairy products with reactivity to baked milk, initial encounter
- T78.111DOther adverse food reaction due to milk and dairy products with reactivity to baked milk, subsequent encounter
- T78.111SOther adverse food reaction due to milk and dairy products with reactivity to baked milk, sequela
- T78.119AOther adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, initial encounter
- T78.119DOther adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, subsequent encounter
- T78.119SOther adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, sequela
- T78.120AOther adverse food reaction due to egg with tolerance to baked egg, initial encounter
- T78.120DOther adverse food reaction due to egg with tolerance to baked egg, subsequent encounter
- T78.120SOther adverse food reaction due to egg with tolerance to baked egg, sequela
- T78.121AOther adverse food reaction due to egg with reactivity to baked egg, initial encounter
- T78.121DOther adverse food reaction due to egg with reactivity to baked egg, subsequent encounter
- T78.121SOther adverse food reaction due to egg with reactivity to baked egg, sequela
- T78.129AOther adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, initial encounter
- T78.129DOther adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, subsequent encounter
- T78.129SOther adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, sequela
- T78.19XAOther adverse food reactions, not elsewhere classified, initial encounter
- T78.19XDOther adverse food reactions, not elsewhere classified, subsequent encounter
- T78.19XSOther adverse food reactions, not elsewhere classified, sequela
T78.2…
3 codes
T78.3…
3 codes
T78.4…
9 codes
- T78.40XAAllergy, unspecified, initial encounter
- T78.40XDAllergy, unspecified, subsequent encounter
- T78.40XSAllergy, unspecified, sequela
- T78.41XAArthus phenomenon, initial encounter
- T78.41XDArthus phenomenon, subsequent encounter
- T78.41XSArthus phenomenon, sequela
- T78.49XAOther allergy, initial encounter
- T78.49XDOther allergy, subsequent encounter
- T78.49XSOther allergy, sequela
T78.8…
3 codes
Outside the US? T78 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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