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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alex Thomas, M.D.

Allergy Physician in Chicago, IL · enumerated 2007 · practices at Center for Asthma & Allergy, Sc.

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

National Provider Identifier

1265632574

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Registry record

Entity type Individual (Type 1)
Name Dr. Alex Thomas
Credential M.D.
Sex Male
Practice address 4014 N Central Ave, Chicago, IL, 60634
Phone (773) 283-9594
Fax (773) 283-6711
Enumeration date Jul 24, 2007
Last updated in NPPES Nov 11, 2025

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 53149 (WI) Secondary
207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 336.135822 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

How do I verify Alex Thomas's NPI record?
Cross-check NPI 1265632574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1265632574 active?
Yes, as of the latest NPPES snapshot, NPI 1265632574 is active (record last updated 2025-11-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-11.