Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sidney M Williams, DDS

General Practice Dentistry in Bellingham, WA · enumerated 2006.

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

National Provider Identifier

1265518930

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Registry record

Entity type Individual (Type 1)

Name Sidney M Williams

Credential DDS

Sex Male

Practice address 4455 Cordata Pkwy, Bellingham, WA, 98226

Phone (360) 671-3225

Fax (360) 671-0000

Enumeration date Oct 27, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License DE00008880 (WA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
2854WI	Other	WA	REGENCE BLUE SHIELD
0175786	Other	WA	STATE LABOR AND INDUSTRIE
5044680	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 is the NPI number for Sidney Williams?

The National Provider Identifier (NPI) for Sidney Williams is 1265518930, a Type 1 (individual) record in the CMS NPPES registry.

Where does Sidney Williams practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.