NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dolly Thomas, MD

Allergy & Immunology Physician in Chicago, IL · enumerated 2006 · practices at Center for Asthma & Allergy, Sc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255359857

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Registry record

Entity type Individual (Type 1)
Name Dr. Dolly Thomas
Credential MD
Sex Female
Practice address 4014 N Central Ave, Chicago, IL, 60634
Phone (773) 283-9594
Fax (773) 283-6711
Enumeration date Jul 18, 2006
Last updated in NPPES Jun 10, 2010

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 036062674 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
036062674 Medicaid IL -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Dolly Thomas?
Dolly Thomas is registered in NPPES with the primary taxonomy of Allergy & Immunology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-10.