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

Dr. Gianmarco O'Brien, DDS

Individual provider Prosthodontics · NPI 1336338847

Dr. Gianmarco O'Brien, DDS is a Prosthodontics in Orange, 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.

See every abbreviation used in this directory →

Practice location Address checks out

1140 W La Veta Ave Ste #530
Orange, CA 92868-4223
Phone: (714) 953-1000
Fax: (714) 953-9957
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Prosthodontics (primary) Taxonomy 1223P0700X · Licence 51630 (CA)

Record details

NPI number1336338847
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedOctober 20, 2007
Last updated in NPPESNovember 8, 2010
Mailing address617 Rockefeller, Irvine, CA 92612-7176

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