Allergy & Immunology Taxonomy Code 207K00000X
207K00000X
Level II - Classification
7,455Registered providers
03Medicare specialty
26.0NUCC version
52States & territories
Definition
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.
Code Details for 207K00000X
About Taxonomy Code 207K00000X
The taxonomy code 207K00000X identifies Allergy & Immunology within the Allopathic & Osteopathic Physicians provider grouping. It is a Level II — Classification code, which names a provider's occupation or service within the broader provider grouping.
NPI records show 7,455 registered providers whose primary or secondary taxonomy is this code. Of these, 2,360 (32%) are registered as organizations and 5,095 (68%) as individual providers. The states with the most allergy & immunology providers are California (741), Texas (639), New York (610). For Medicare enrollment, it crosswalks to specialty code 03 (Physician/Allergy/ Immunology).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
7,455Total providers
2,360Organizations 32%
5,095Individuals 68%
2,281Female
2,813Male
1Undisclosed
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-07-12T00:00:00.
View all 7,455 providersAllergy & Immunology Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
All states (nationwide)
7,455
Alabama53Alaska17Arizona143Arkansas47California741Colorado192Connecticut105Delaware22District Of Columbia40Florida454Georgia196Hawaii27Idaho15Illinois271Indiana134Iowa56Kansas65Kentucky128Louisiana112Maine20Maryland231Massachusetts225Michigan245Minnesota129Mississippi43Missouri83Montana25Nebraska44Nevada46New Hampshire35New Jersey261New Mexico36New York610North Carolina249North Dakota15Ohio251Oklahoma43Oregon79Pennsylvania333Puerto Rico32Rhode Island24South Carolina96South Dakota9Tennessee155Texas639Utah57Vermont9Virginia230Washington140West Virginia41Wisconsin110Wyoming6
Frequently Asked Questions
207K00000X questionsNPPES lists 7,455 registered providers with this taxonomy code (Allergy & Immunology).
Both. About 32% of these providers are registered as organizations and 68% as individuals.
It crosswalks to Medicare specialty code 03 (Physician/Allergy/ Immunology).
It is a Level II - Classification code in the NUCC Health Care Provider Taxonomy set.
Use the "Providers by state" directory on this page to open the list of allergy & immunology providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 26.0. Provider counts from NPPES. See nucc.org.
