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Diagnosis Code

T78.40XA ALLERGY, UNSPECIFIED, INITIAL ENCOUNTER


Code Information

Diagnosis Code: T78.40XA

Short Description: Allergy, unspecified, initial encounter

Long Description: Allergy, unspecified, initial encounter

The code T78.40XA is VALID for claim submission

Code Classification:

  • Injury, poisoning and certain other consequences of external causes (S00–T88)
    • Other and unspecified effects of external causes (T66-T78)
      • Adverse effects, not elsewhere classified (T78)
        • T78.40XA Allergy, unspecified, initial encounter

Code Version: 2022 ICD-10-CM


Synonyms

  • Acute allergic reaction
  • Adverse cutaneous reaction to diagnostic procedure
  • Adverse reaction caused by detergent
  • Adverse reaction to bone resorption inhibitor
  • Adverse reaction to oil
  • Allergic bronchitis
  • Allergic condition
  • Allergic cough
  • Allergic disorder
  • Allergic disorder - symptom change
  • Allergic disorder monitoring status
  • Allergic disorder of digestive system
  • Allergic disorder of respiratory system
  • Allergic disorder of respiratory tract
  • Allergic disorder treatment started
  • Allergic disposition
  • Allergic encephalitis
  • Allergic facies
  • Allergic gingival disease
  • Allergic otitis externa
  • Allergic reaction
  • Allergic reaction after allergen immunotherapy
  • Allergic reaction caused by analgesic
  • Allergic reaction caused by anesthetic
  • Allergic reaction caused by Hevea brasiliensis latex protein
  • Allergic reaction caused by hymenoptera venom
  • Allergic reaction caused by hymenoptera venom
  • Allergic reaction caused by insect bite and/or insect sting
  • Allergic reaction caused by insect bite and/or insect sting
  • Allergic reaction caused by insect bite and/or insect sting
  • Allergic reaction due to allergy skin test
  • Allergic reaction to adhesive
  • Allergic reaction to bee sting
  • Allergic reaction to colophony
  • Allergic reaction to detergent
  • Allergic reaction to drug
  • Allergic reaction to hair dye
  • Allergic reaction to nickel
  • Allergic reaction to oil
  • Allergic reaction to platinum
  • Allergic reaction to venom
  • Allergic reaction to wasp sting
  • Allergic sensitization
  • Allergic vaginitis
  • Allergy skin test positive
  • Allergy test positive
  • Allergy treatment changed
  • Allopurinol adverse reaction
  • Allopurinol hypersensitivity syndrome
  • Angry back syndrome
  • Atopic reaction
  • Cell-mediated immune reaction
  • Chronic allergic otitis externa
  • Chronic non-infective otitis externa
  • Complication of diagnostic procedure
  • Complication of patch testing
  • Contact hypersensitivity reaction
  • Contact hypersensitivity reaction
  • Cutaneous hypersensitivity
  • Cutaneous hypersensitivity reaction caused by Hymenoptera venom
  • Cutis laxa following hypersensitivity reaction
  • Cutis laxa, acquired type
  • Drug reaction with eosinophilia and systemic symptoms
  • Drug reaction with eosinophilia and systemic symptoms
  • Drug reaction with eosinophilia and systemic symptoms
  • Drug reaction with eosinophilia and systemic symptoms caused by strontium ranelate
  • Emollient adverse reaction
  • Hypersensitivity condition
  • Hypersensitivity disorder of respiratory tract
  • Hypersensitivity disposition
  • Hypersensitivity finding
  • Hypersensitivity finding
  • Hypersensitivity finding
  • Hypersensitivity gingivitis
  • Hypersensitivity reaction
  • Hypersensitivity reaction mediated by antibody
  • Hypersensitivity reaction mediated by immune complex
  • Hypersensitivity reaction with blocking antibody
  • Hypersensitivity reaction without blocking antibody
  • Immune hypersensitivity reaction by mechanism
  • Injection site hypersensitivity
  • Laryngotracheobronchitis
  • Late effect of accidental injury
  • Late effect of accidental injury
  • Myocarditis due to hypersensitivity state
  • Non-allergic hypersensitivity condition
  • Pain provoked by allergen
  • Recurrent allergic croup
  • Recurrent croup
  • Skin: type 3 delayed reaction
  • Type 1 hypersensitivity response
  • Type 1 skin hypersensitivity reaction
  • Type 4 hypersensitivity response
  • Ulcer of esophagus due to allergic disorder
  • Xanthine oxidase inhibitor adverse reaction

Diagnostic Related Group(s)

The code T78.40XA is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)
  • Allergic Reactions With Mcc (915)
  • Allergic Reactions Without Mcc (916)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
T78.40XA Right Arrow 995.3 Allergy, unspecified

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
T78 Adverse effects, not elsewhere classified
T78.0 Anaphylactic reaction due to food
T78.00 Anaphylactic reaction due to unspecified food
T78.00XA Anaphylactic reaction due to unspecified food, initial encounter
T78.00XD Anaphylactic reaction due to unspecified food, subsequent encounter
T78.00XS Anaphylactic reaction due to unspecified food, sequela
T78.01 Anaphylactic reaction due to peanuts
T78.01XA Anaphylactic reaction due to peanuts, initial encounter
T78.01XD Anaphylactic reaction due to peanuts, subsequent encounter
T78.01XS Anaphylactic reaction due to peanuts, sequela
T78.02 Anaphylactic reaction due to shellfish (crustaceans)
T78.02XA Anaphylactic reaction due to shellfish (crustaceans), initial encounter
T78.02XD Anaphylactic reaction due to shellfish (crustaceans), subsequent encounter
T78.02XS Anaphylactic reaction due to shellfish (crustaceans), sequela
T78.03 Anaphylactic reaction due to other fish
T78.03XA Anaphylactic reaction due to other fish, initial encounter
T78.03XD Anaphylactic reaction due to other fish, subsequent encounter
T78.03XS Anaphylactic reaction due to other fish, sequela
T78.04 Anaphylactic reaction due to fruits and vegetables
T78.04XA Anaphylactic reaction due to fruits and vegetables, initial encounter
T78.04XD Anaphylactic reaction due to fruits and vegetables, subsequent encounter
T78.04XS Anaphylactic reaction due to fruits and vegetables, sequela
T78.05 Anaphylactic reaction due to tree nuts and seeds
T78.05XA Anaphylactic reaction due to tree nuts and seeds, initial encounter
T78.05XD Anaphylactic reaction due to tree nuts and seeds, subsequent encounter
T78.05XS Anaphylactic reaction due to tree nuts and seeds, sequela
T78.06 Anaphylactic reaction due to food additives
T78.06XA Anaphylactic reaction due to food additives, initial encounter
T78.06XD Anaphylactic reaction due to food additives, subsequent encounter
T78.06XS Anaphylactic reaction due to food additives, sequela
T78.07 Anaphylactic reaction due to milk and dairy products
T78.07XA Anaphylactic reaction due to milk and dairy products, initial encounter
T78.07XD Anaphylactic reaction due to milk and dairy products, subsequent encounter
T78.07XS Anaphylactic reaction due to milk and dairy products, sequela
T78.08 Anaphylactic reaction due to eggs
T78.08XA Anaphylactic reaction due to eggs, initial encounter
T78.08XD Anaphylactic reaction due to eggs, subsequent encounter
T78.08XS Anaphylactic reaction due to eggs, sequela
T78.09 Anaphylactic reaction due to other food products
T78.09XA Anaphylactic reaction due to other food products, initial encounter
T78.09XD Anaphylactic reaction due to other food products, subsequent encounter
T78.09XS Anaphylactic reaction due to other food products, sequela
T78.1 Other adverse food reactions, not elsewhere classified
T78.1XXA Other adverse food reactions, not elsewhere classified, initial encounter
T78.1XXD Other adverse food reactions, not elsewhere classified, subsequent encounter
T78.1XXS Other adverse food reactions, not elsewhere classified, sequela
T78.2 Anaphylactic shock, unspecified
T78.2XXA Anaphylactic shock, unspecified, initial encounter
T78.2XXD Anaphylactic shock, unspecified, subsequent encounter
T78.2XXS Anaphylactic shock, unspecified, sequela
T78.3 Angioneurotic edema
T78.3XXA Angioneurotic edema, initial encounter
T78.3XXD Angioneurotic edema, subsequent encounter
T78.3XXS Angioneurotic edema, sequela
T78.4 Other and unspecified allergy
T78.40 Allergy, unspecified
T78.40XD Allergy, unspecified, subsequent encounter
T78.40XS Allergy, unspecified, sequela
T78.41 Arthus phenomenon
T78.41XA Arthus phenomenon, initial encounter
T78.41XD Arthus phenomenon, subsequent encounter
T78.41XS Arthus phenomenon, sequela
T78.49 Other allergy
T78.49XA Other allergy, initial encounter
T78.49XD Other allergy, subsequent encounter
T78.49XS Other allergy, sequela
T78.8 Other adverse effects, not elsewhere classified
T78.8XXA Other adverse effects, not elsewhere classified, initial encounter
T78.8XXD Other adverse effects, not elsewhere classified, subsequent encounter
T78.8XXS Other adverse effects, not elsewhere classified, sequela

This page was last updated on: 10/1/2023

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