Dr. Thomas James Longwill, DDS

Dr. Thomas James Longwill is a General Practice Dentistry provider (Dentist) practicing in Roswell, NM, registered in the NPPES registry with NPI 1689676017 since 2005. The credential DDS stands for Doctor of Dental Surgery.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1689676017
Entity type	Individual (Type 1)
Name	Dr. Thomas James Longwill
Credential	DDS
Sex	Male
Practice address	Roswell, NM, 88203
Phone	5756233204
Fax	5756252071
Enumeration date	2005-08-15
Last updated in NPPES	2016-01-25

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	1528	NM

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
0016994	Medicaid	NM	—
851955	Other	NM	PROVIDER ID

Copy-ready billing details

Provider: Thomas Longwill, DDS
NPI: 1689676017
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: Roswell, NM, 88203

Verify this record

Cross-check NPI 1689676017 against the authoritative CMS record: view Dr. Thomas James Longwill 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 Longwill?

Thomas Longwill 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 2016-01-25.