HAROLD S. NELSON MD
NPI 1104916873
Allergy & Immunology in Denver, CO

Q: What is Harold Nelson's NPI number?

The NPI number for Harold Nelson is 1104916873. It was assigned to this individual provider in the NPPES registry on October 13, 2006.

Q: What is Harold Nelson's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Harold Nelson was last updated on November 12, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 13, 2006

1400 JACKSON ST, DENVER, CO 80206(303) 388-4461(303) 270-2174 Get Directions Write a Review

NPPES record last updated: November 12, 2020. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Harold S. Nelson Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HAROLD S. NELSON MD (NPI 1104916873) is an individual allergy & immunology provider in Denver, Colorado, licensed in Colorado (18391) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1104916873

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameHAROLD S. NELSONCredential: MD

Location Address1400 JACKSON STDenver, CO 80206-2761

Mailing Address1400 Jackson StDenver, CO 80206-2761 · (303) 388-4461 · Fax (300) 327-0217

Phone(303) 388-4461

Fax(303) 270-2174

Sole ProprietorNo

Enumeration DateOctober 13, 2006

Last NPPES UpdateNovember 12, 2020

NPPES CertifiedNovember 12, 2020

✔ NPI 1104916873 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in CO · 18391

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.

Also ListedInternal Medicine · Clinical & Laboratory ImmunologyTaxonomy 207RI0001X · License 18391 (CO)

1400 JACKSON ST, Denver, CO 80206

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Other Identifiers 1

Medicaid01183912CO

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JESSICA GALANT-SWAFFORD

Allergy & Immunology