Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Thomas P Williams, DDS

Dentist in Dubuque, IA · enumerated 2005 · practices at Great River Oral and Maxillofacial Surgery PC.

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

National Provider Identifier

1780678466

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Thomas P Williams

Credential DDS

Sex Male

Practice address Dubuque, IA, 52003

Phone (563) 557-1440

Fax (563) 557-7001

Enumeration date Sep 8, 2005

Last updated in NPPES Mar 27, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 23154 (CA) Secondary

122300000X Dentist Dental Providers · License 5000989015 (WI) Secondary

122300000X Dentist Dental Providers · License 05935 (IA) 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
09100	Other	IA	BCBS DELTA DENTAL
33570400	Medicaid	WI	-
0091009	Medicaid	IA	-

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

How do I verify Thomas Williams's NPI record?

Cross-check NPI 1780678466 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1780678466 active?

Yes, as of the latest NPPES snapshot, NPI 1780678466 is active (record last updated 2026-03-27).

Other providers at this practice address

Browse all →

Daryl Bee Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1821082744 Great River Oral and Maxillofacial Surgery PC Oral and Maxillofacial Surgery Clinic/Center · Dubuque, IA NPI 1992799811 Michael Dalton Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1124012059 Paul Delong Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1922092865 Andrew Dewitt Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1235123936 Thomas King Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1942287875 Kimberly Pingel Oral and Maxillofacial Surgery (Dentist) · Dubuque, IA NPI 1326245796

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-27.