Robert Darnell, D.D.S.
General Practice Dentistry · Castro Valley, CA
Robert Darnell, D.D.S. is a general practice dentistry with a practice address in Castro Valley, California, and NPI 1144316993, issued on Oct 5, 2006. Check the license (California 28534, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Robert Darnell
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 28534 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20632 Redwood RD, Castro Valley, CA 94546
- Phone
- (510) 582-1602
- Enumerated
- Oct 5, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (510) 582-1604
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Also registered at 20632 Redwood RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Coker, MFTMarriage & Family Therapist1629101464
- Cynthia Ferrari, M.S., M.F.T.Marriage & Family Therapist1043426984
- Darcy Leveque, MS COUNSELINGMarriage & Family Therapist1316096795
- Kristin Porter, M.F.T.Marriage & Family Therapist1346342417
Verify Robert Darnell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 28534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Robert Darnell among 17,852 general practice dentistry records in California
Robert Darnell, D.D.S. is one of 17,852 general practice dentistry records with a practice address in California. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 71% newer
- In a Medicare fileNo · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 general practice dentistry records list a practice address in Castro Valley
They are 24 of the 999 NPPES records with a practice address in Castro Valley, and 17,852 general practice dentistry records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,852 in California → Every provider in Castro Valley → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Bruce Ahtye, D.D.S.Castro Valley, CA 945461528147600
- John Berk, D.D.S.Castro Valley, CA 945461770507675
- Jeffrey Erickson, D.D.SCastro Valley, CA 945461053451435
- Gregory Hong, D.D.S.Castro Valley, CA 945461912051905
- Robert Maass, DDSCastro Valley, CA 945461205989415
- George Mackenzie, DDSCastro Valley, CA 945461114070315
- Robert Oneill, DDSCastro Valley, CA 945461659593366
- Shirin Salehinia, D.D.SCastro Valley, CA 945461851444962
Common questions
What is Robert Darnell, D.D.S.'s NPI number?
Robert Darnell, D.D.S.'s National Provider Identifier (NPI) is 1144316993, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Darnell, D.D.S. located?
The NPPES record lists a practice address at 20632 Redwood RD, Castro Valley, CA, 94546. Phone: (510) 582-1602. Providers update this record themselves, so call before visiting.
How can I verify Robert Darnell, D.D.S.'s license?
NPPES lists California license number 28534, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.