Dr. William Edward Gonce, DDS

Dr. William Edward Gonce is a General Practice Dentistry provider (Dentist) practicing in Hockessin, DE, registered in the NPPES registry with NPI 1689760266 since 2006. The credential DDS stands for Doctor of Dental Surgery. Practices at Dentistry of Hockessin (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1689760266
Entity type	Individual (Type 1)
Name	Dr. William Edward Gonce
Credential	DDS
Sex	Male
Practice address	Hockessin, DE, 19707
Phone	3022352400
Fax	3022352404
Enumeration date	2006-10-04
Last updated in NPPES	2015-09-22

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	G10001009	DE

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

Copy-ready billing details

Provider: William Gonce, DDS
NPI: 1689760266
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: Hockessin, DE, 19707

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1689392508	Dentistry of Hockessin	Organization	General Practice Dentistry	Hockessin, DE

Verify this record

Cross-check NPI 1689760266 against the authoritative CMS record: view Dr. William Edward Gonce 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

What specialty is William Gonce?

William Gonce 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.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2015-09-22.