Edwin M. Tjan, DDS
General Practice Dentistry · Castro Valley, CA
Edwin M. Tjan, DDS is a general practice dentistry with a practice address in Castro Valley, California, and NPI 1396903639, issued on May 22, 2008. Check the license (California 37295, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Edwin M. Tjan
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 37295 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20353 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 886-1113
- Enumerated
- May 22, 2008
- Record last updated
- May 22, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Also registered at 20353 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Corzine, PHARMDPharmacist1326496795
- Gregory Hong, D.D.S.General Practice Dentistry1912051905
- Sudhir Reddy, PHARM DAmbulatory Care Pharmacist1043761877
Verify Edwin M. Tjan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 37295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $58.94
1 payment: food and beverage; the largest payer was Align Technology, Inc. The 41,669 providers of this specialty with any payment received $597.01 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Edwin M. Tjan among 17,852 general practice dentistry records in California
Edwin M. Tjan, DDS 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. Its NPI, issued in 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 35% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2008 · 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.
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
- Robert Darnell, D.D.S.Castro Valley, CA 945461144316993
- 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
Common questions
What is Edwin M. Tjan, DDS's NPI number?
Edwin M. Tjan, DDS's National Provider Identifier (NPI) is 1396903639, issued on May 22, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Edwin M. Tjan, DDS located?
The NPPES record lists a practice address at 20353 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 886-1113. Providers update this record themselves, so call before visiting.
How can I verify Edwin M. Tjan, DDS's license?
NPPES lists California license number 37295, 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. Medicare files from data.cms.gov. 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.