Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Carl Thomas, MD

Pediatrics Physician in Seattle, WA · enumerated 2023.

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

National Provider Identifier

1497457105

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Carl Thomas

Credential MD

Sex Male

Practice address 4800 Sand Point Way Ne # Oc.7830, Seattle, WA, 98105

Phone (206) 987-2525

Enumeration date Mar 20, 2023

Last updated in NPPES Aug 26, 2026

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License ML61424208 (WA) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 166907 (MT) Secondary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Alexander Thomas practice?

The practice location on file with NPPES is in Seattle, WA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alexander Thomas?

The National Provider Identifier (NPI) for Alexander Thomas is 1497457105, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-26.