ICD-10-CM Alphabetic Index · FY 2026 131 Entries
Allergy in the ICD-10-CM Index ICD-10-CM
The main term Allergy, allergic (reaction) (to) carries 131 index entries pointing to 57 ICD-10-CM codes. The default entry is T78.40, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
131
Index Entries
57
Codes Referenced
T78.40
Default Code
A
Letter
131 of 131 shown
ICD-10-CM
Index Entries Under Allergy 131 entries · 57 codes
Allergy, allergic (reaction) (to) T78.40 Non-billable
air-borne substance NEC (rhinitis) J30.89
alveolitis (extrinsic) J67.9
due to
Aspergillus clavatus J67.4
Cryptostroma corticale J67.6
organisms (fungal, thermophilic actinomycete) growing in ventilation (air conditioning) systems J67.7
specified type NEC J67.8
anaphylactic reaction or shock T78.2 Non-billable
angioneurotic edema T78.3 Non-billable
animal (dander) (epidermal) (hair) (rhinitis) J30.81
bee sting (anaphylactic shock) T63.44 Non-billable
biological see Allergy, drug
colitis K52.29 see also Colitis, allergic
dairy products T78.119 Non-billable
with
reactivity to baked milk T78.111 Non-billable
tolerance to baked milk T78.110 Non-billable
anaphylactic reaction T78.079 Non-billable
with
reactivity to baked milk T78.071 Non-billable
tolerance to baked milk T78.070 Non-billable
dander (animal) (rhinitis) J30.81
dandruff (rhinitis) J30.81
dental restorative material (existing) K08.55
dermatitis see Dermatitis, contact, allergic
diathesis see History, allergy
drug, medicament & biological (any) (external) (internal) T78.40 Non-billable
correct substance properly administered see Table of Drugs and Chemicals, by drug, adverse effect
wrong substance given or taken NEC (by accident) see Table of Drugs and Chemicals, by drug, poisoning
due to pollen J30.1
dust (house) (stock) (rhinitis) J30.89
with asthma see Asthma, allergic extrinsic
eczema see Dermatitis, contact, allergic
eggs
adverse reaction NEC T78.129 Non-billable
with
reactivity to baked egg T78.121 Non-billable
tolerance to baked egg T78.120 Non-billable
anaphylactic reaction T78.089 Non-billable
with
reactivity to baked egg T78.081 Non-billable
tolerance to baked egg T78.080 Non-billable
epidermal (animal) (rhinitis) J30.81
feathers (rhinitis) J30.89
food (any) (ingested) NEC T78.19 Non-billable
anaphylactic shock see Shock, anaphylactic, due to food
dermatitis see Dermatitis, due to, food
dietary counseling and surveillance Z71.3
in contact with skin L23.6
rhinitis J30.5
status (without reaction) Z91.018
beef Z91.014
eggs Z91.0120
with
reactivity to baked egg Z91.0122
tolerance to baked egg Z91.0121
lamb Z91.014
mammalian meats Z91.014
milk products Z91.0110
with
reactivity to baked milk Z91.0112
tolerance to baked milk Z91.0111
peanuts Z91.010
pork Z91.014
red meats Z91.014
seafood Z91.013
specified NEC Z91.018
gastrointestinal see also specific type of allergic reaction
meaning colitis K52.29 see also Colitis, allergic
meaning gastroenteritis K52.29 see also Gastroenteritis, allergic
meaning other adverse food reaction not elsewhere classified T78.19 Non-billable
grain J30.1
grass (hay fever) (pollen) J30.1
asthma see Asthma, allergic extrinsic
hair (animal) (rhinitis) J30.81
history (of) see History, allergy
horse serum see Allergy, serum
inhalant (rhinitis) J30.89
pollen J30.1
kapok (rhinitis) J30.89
medicine see Allergy, drug
milk protein Z91.0110 see also Allergy, food
with
reactivity to baked milk Z91.0112
tolerance to baked milk Z91.0111
adverse reaction NEC T78.119 Non-billable
with
reactivity to baked milk T78.111 Non-billable
tolerance to baked milk T78.110 Non-billable
anaphylactic reaction T78.079 Non-billable
with
reactivity to baked milk T78.071 Non-billable
tolerance to baked milk T78.070 Non-billable
dermatitis L27.2
enterocolitis syndrome K52.21
enteropathy K52.22
gastroenteritis K52.29
gastroesophageal reflux K21.9 see also Reaction, adverse, food
with esophagitis (without bleeding) K21.00
with bleeding K21.01
proctocolitis K52.29
nasal, seasonal due to pollen J30.1
pneumonia J82.89
pollen (any) (hay fever) J30.1
asthma see Asthma, allergic extrinsic
primrose J30.1
primula J30.1
proctocolitis K52.29
purpura D69.0
ragweed (hay fever) (pollen) J30.1
asthma see Asthma, allergic extrinsic
rose (pollen) J30.1
seasonal NEC J30.2
Senecio jacobae (pollen) J30.1
anaphylactic shock T80.59 Non-billable
shock (anaphylactic) T78.2 Non-billable
due to
administration of blood and blood products T80.51 Non-billable
adverse effect of correct medicinal substance properly administered T88.6 Non-billable
immunization T80.52 Non-billable
serum NEC T80.59 Non-billable
vaccination T80.52 Non-billable
specific NEC T78.49 Non-billable
tree (any) (hay fever) (pollen) J30.1
asthma see Asthma, allergic extrinsic
upper respiratory J30.9
urticaria L50.0
vaccine see Allergy, serum
wheat see Allergy, food
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Related Index Terms
HistoryReactionShockAll index terms starting with AIndex to Diseases and InjuriesICD-10-CM Code Lookup
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
