Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William P Hammond IV, MD

Medical Oncology Physician in Burien, WA · enumerated 2005.

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

National Provider Identifier

1740277219

Verified

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Registry record

Entity type Individual (Type 1)

Name William P Hammond IV

Credential MD

Sex Male

Practice address 16233 Sylvester Rd Sw, Burien, WA, 98166

Phone (206) 439-5577

Fax (253) 426-4142

Enumeration date Sep 30, 2005

Last updated in NPPES Dec 3, 2020

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD00013202 (WA) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD00013202 (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
156945	Other	WA	L&I
1740277219	Medicaid	WA	-
1017833	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

Where does William Hammond practice?

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

What is the NPI number for William Hammond?

The National Provider Identifier (NPI) for William Hammond is 1740277219, 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 2020-12-03.