Thomas Hallquist, DDS

Thomas Hallquist is a General Practice Dentistry provider (Dentist) practicing in Oshkosh, WI, registered in the NPPES registry with NPI 1720001449 since 2006. The credential DDS stands for Doctor of Dental Surgery.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1720001449
Entity type	Individual (Type 1)
Name	Thomas Hallquist
Credential	DDS
Sex	Male
Practice address	Oshkosh, WI, 54904
Phone	9202356070
Fax	9202355668
Enumeration date	2006-07-25
Last updated in NPPES	2007-07-08

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

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	2675-015	WI

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
33424200	Medicaid	WI	—

Copy-ready billing details

Provider: Thomas Hallquist, DDS
NPI: 1720001449
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: Oshkosh, WI, 54904

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1790256428	Hallquist Dental, LLC	Organization	Dental Clinic/Center	Oshkosh, WI
1578118329	Hallquist Family Dental LLC	Organization	Dental Clinic/Center	Oshkosh, WI

Verify this record

Cross-check NPI 1720001449 against the authoritative CMS record: view Thomas Hallquist on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

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.

What specialty is Thomas Hallquist?

Thomas Hallquist is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.