Allopathic & Osteopathic Physicians / 207KA0200X
Individual · specialization · Medicare specialty 03
207KA0200X Allergy Physician
207KA0200X is the taxonomy code for Allergy, a specialization of Allergy & Immunology, in the NUCC group “Allopathic & Osteopathic Physicians”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 03, Physician/Allergy/ Immunology, under which 4,224 practitioners are enrolled.
- 1Taxonomy code 207KA0200X
- 2Level Specialization
- 3Medicare specialty 03 Physician/Allergy/ Immunology
- 4Codes in this group 238
Definition
A physician who specializes in the diagnosis, treatment, and management of allergies.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 207KA0200X sits
- Group: Allopathic & Osteopathic Physicians — code 2 of 238 in the group
- Classification: Allergy & Immunology 207K00000X
- Specialization: Allergy 207KA0200X
Choose 207KA0200X over the general Allergy & Immunology code (207K00000X) when the provider's training or certification is specifically in allergy; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 207KA0200X to Medicare specialty 03 (Physician/Allergy/ Immunology). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 4,224 practitioners are enrolled under it nationally, and 2 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 207K00000X Allergy & Immunology Physician; 207KI0005X Clinical & Laboratory Immunology (Allergy & Immunology) Physician.
Related codes
| Code | Allergy & Immunology — other specializations |
|---|---|
| 207K00000X | Allergy & Immunology Physician |
| 207KI0005X | Clinical & Laboratory Immunology |
History of 207KA0200X
NUCC's notes record no dated changes for 207KA0200X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Find providers with 207KA0200X
Using 207KA0200X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.