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

Robert Michael Oneill, DDS

Individual provider General Practice Dentistry · NPI 1659593366

Robert Michael Oneill, DDS is a General Practice Dentistry in Castro Valley, 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

20054 Lake Chabot Rd
Castro Valley, CA 94546-5304
Phone: (510) 886-1231
Fax: (510) 886-4736
Show map & directions

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

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 21627 (CA)

Record details

NPI number1659593366
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedMay 3, 2007
Last updated in NPPESJuly 8, 2007
Mailing address20054 Lake Chabot Rd, Castro Valley, CA 94546-5304

Other providers in Castro Valley