2026 ICD-10-CM Diagnosis Code T78.19XA
Other adverse food reactions, not elsewhere classified, initial encounter
- ICD-10-CM Code:
- T78.19XA
- ICD-10 Code for:
- Other adverse food reactions, NEC, initial encounter
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
T78.19XA is a billable diagnosis code used to specify a medical diagnosis of other adverse food reactions, not elsewhere classified, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.
This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.
T78.19XA is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like other adverse food reactions not elsewhere classified. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.
Approximate Synonyms
The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.
- Adverse drug interaction
- Adverse medication interaction with food
- Adverse reaction caused by monosodium glutamate
- Adverse reaction to chewing gum additive
- Adverse reaction to fig
- Adverse reaction to food
- Adverse reaction to food additive
- Allergic angioedema
- Allergic angioedema
- Allergic angioedema due to ingested food
- Allergic bronchospasm caused by dietary substance
- Allergic reaction caused by fish
- Allergic reaction caused by food additive
- Allergic reaction caused by fruit
- Allergic reaction caused by mollusk
- Allergic reaction caused by peanut
- Allergic reaction caused by seafood
- Allergic reaction caused by seed
- Allergic reaction caused by shellfish
- Allergic reaction caused by tree nut
- Allergic reaction to food
- Allergic urticaria caused by ingested food
- Allergy to food
- Bronchospasm
- Enteral and supplement feeds adverse reaction
- Food-induced angioedema-urticaria
- Headache caused by monosodium glutamate
- Hypersensitivity reaction caused by food
- Intolerance to monosodium glutamate
- Medication interaction with food
- Non-allergic hypersensitivity reaction caused by sulfite
Clinical Information
Grade 5 Bronchospasm, CTCAE|Grade 5 Bronchospasm
deathGrade 4 Bronchospasm, CTCAE|Grade 4 Bronchospasm
life-threatening respiratory or hemodynamic compromise; intubation or urgent intervention indicatedGrade 3 Bronchospasm, CTCAE|Grade 3 Bronchospasm
supplemental oxygen indicated; limiting self-care adl or severe impact on age-appropriate normal daily activity (pediatric)Grade 2 Bronchospasm, CTCAE|Grade 2 Bronchospasm
symptomatic; medical intervention indicated; limiting instrumental adl or mild/moderate impact on age-appropriate normal daily activity (pediatric)Grade 1 Bronchospasm, CTCAE|Grade 1 Bronchospasm
mild symptoms; intervention not indicatedExercise-Induced Bronchospasm|Exercise induced bronchospasm
sudden contraction of the smooth muscles of the bronchial wall that occurs during or following exercise.Bronchospasm, CTCAE|Bronchospasm|Bronchospasm
a disorder characterized by a sudden contraction of the smooth muscles of the bronchial wall or narrowing of the airway. may be manifested as wheezing.Bronchospasm
sudden contraction of the smooth muscles of the bronchial wall.
Coding Guidelines
The appropriate 7th character is to be added to each code from block Adverse effects, not elsewhere classified (T78). Use the following options for the aplicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
New 2026 ICD-10-CM Code
T78.19XA is new to ICD-10-CM code set for the FY 2026, effective October 1, 2025. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2025. This is a new and revised code for the FY 2026 (October 1, 2025 - September 30, 2026).
Code Edits
The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.
Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.
Replacement Code
T7819XA replaces the following previously assigned ICD-10-CM code(s):
- T78.1XXA - Oth adverse food reactions, not elsewhere classified, init
Code History
- FY 2026 - Code Added, effective from 10/1/2025 through 9/30/2026
