Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Young Gregg, DDS

Individual provider Dentist · NPI 1568589729

Dr. William Young Gregg, DDS is a Dentist in Lake Forest, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

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Practice location Address checks out

23321 El Toro Rd Ste D
Lake Forest, CA 92630-4825
Phone: (949) 770-7686
Fax: (949) 770-0725
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dentist (primary) Taxonomy 122300000X · Licence 26644 (CA)

Record details

NPI number1568589729
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedMarch 23, 2007
Last updated in NPPESJuly 8, 2007
Mailing address23321 El Toro Rd, Suite D, Lake Forest, CA 92630-4825

Other providers in Lake Forest