Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

T78

Adverse effects, not elsewhere classified

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
T78.0Anaphylactic reaction due to foodCategory
T78.00Anaphylactic reaction due to unspecified foodCategory
T78.00XAAnaphylactic reaction due to unspecified food, initial encounterBillable
T78.00XDAnaphylactic reaction due to unspecified food, subsequent encounterBillable
T78.00XSAnaphylactic reaction due to unspecified food, sequelaBillable
T78.01Anaphylactic reaction due to peanutsCategory
T78.01XAAnaphylactic reaction due to peanuts, initial encounterBillable
T78.01XDAnaphylactic reaction due to peanuts, subsequent encounterBillable
T78.01XSAnaphylactic reaction due to peanuts, sequelaBillable
T78.02Anaphylactic reaction due to shellfish (crustaceans)Category
T78.02XAAnaphylactic reaction due to shellfish (crustaceans), initial encounterBillable
T78.02XDAnaphylactic reaction due to shellfish (crustaceans), subsequent encounterBillable
T78.02XSAnaphylactic reaction due to shellfish (crustaceans), sequelaBillable
T78.03Anaphylactic reaction due to other fishCategory
T78.03XAAnaphylactic reaction due to other fish, initial encounterBillable
T78.03XDAnaphylactic reaction due to other fish, subsequent encounterBillable
T78.03XSAnaphylactic reaction due to other fish, sequelaBillable
T78.04Anaphylactic reaction due to fruits and vegetablesCategory
T78.04XAAnaphylactic reaction due to fruits and vegetables, initial encounterBillable
T78.04XDAnaphylactic reaction due to fruits and vegetables, subsequent encounterBillable
T78.04XSAnaphylactic reaction due to fruits and vegetables, sequelaBillable
T78.05Anaphylactic reaction due to tree nuts and seedsCategory
T78.05XAAnaphylactic reaction due to tree nuts and seeds, initial encounterBillable
T78.05XDAnaphylactic reaction due to tree nuts and seeds, subsequent encounterBillable
T78.05XSAnaphylactic reaction due to tree nuts and seeds, sequelaBillable
T78.06Anaphylactic reaction due to food additivesCategory
T78.06XAAnaphylactic reaction due to food additives, initial encounterBillable
T78.06XDAnaphylactic reaction due to food additives, subsequent encounterBillable
T78.06XSAnaphylactic reaction due to food additives, sequelaBillable
T78.07Anaphylactic reaction due to milk and dairy productsCategory

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.