Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Donald G Guinee Jr., MD

Clinical Pathology/Laboratory Medicine Physician in Seattle, WA · enumerated 2006.

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

National Provider Identifier

1427079128

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Registry record

Entity type Individual (Type 1)

Name Donald G Guinee Jr.

Credential MD

Sex Male

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

Phone (206) 223-6600

Enumeration date Jul 21, 2006

Last updated in NPPES Feb 22, 2013

Taxonomy & licenses

207ZP0105X Clinical Pathology/Laboratory Medicine Physician Allopathic & Osteopathic Physicians · License MD00036427 (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
220029865	Other	-	RAILROAD MEDICARE
US1042891	Other	WA	AETNA/USHC SPECIALIST
0039575	Other	WA	LABOR & INDUSTRY
1427079128	Other	WA	MONTANA MEDICAID
MD7057W	Other	WA	ALASKA MEDICAID
GU1168	Other	WA	BLUE SHIELD
8229981	Medicaid	WA	-

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

What specialty is Donald Guinee?

Donald Guinee is registered in NPPES with the primary taxonomy of Clinical Pathology/Laboratory Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-02-22.