Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Barry Alan Aaronson, MD

Hospitalist Physician in Seattle, WA · enumerated 2006.

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

National Provider Identifier

1952418345

Verified

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Registry record

Entity type Individual (Type 1)

Name Barry Alan Aaronson

Credential MD

Sex Male

Practice address 1100 9th Ave, Seattle, WA, 98101

Phone (206) 223-6600

Enumeration date Aug 23, 2006

Last updated in NPPES May 7, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD00034931 (WA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD00034931 (WA) 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
MD3980W	Other	WA	ALASKA MEDICAID
8223075	Medicaid	WA	-
AA9798	Other	WA	BLUE SHIELD
0039581	Other	WA	LABOR & INDUSTRY
010064529	Other	-	RAILROAD MEDICARE
US2075562	Other	WA	AETNA/USHC SPECIALIST

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 Barry Aaronson 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 Barry Aaronson?

The National Provider Identifier (NPI) for Barry Aaronson is 1952418345, 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 2010-05-07.