Tze-Foun Tsiang, DDS,MSD
General Practice Dentistry · San Mateo, CA
Tze-Foun Tsiang, DDS,MSD is a general practice dentistry with a practice address in San Mateo, California, and NPI 1780801886, issued on Apr 19, 2007. Check the license (California D48394, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tze-Foun Tsiang
- Credential
- DDS,MSD
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- D48394 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 N San Mateo Dr, San Mateo, CA 94401
- Phone
- (650) 348-3328
- Enumerated
- Apr 19, 2007
- Record last updated
- May 11, 2010 (not updated in 16 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 320 N San Mateo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Li-Chu Chen, DDSGeneral Practice Dentistry1982790861
- Fred Diercks, DDSDentist1215943071
- Paul Diercks, DDSDentist1326055005
Verify Tze-Foun Tsiang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license D48394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average general practice dentistry in 2024
66 Medicare Part D claims for 32 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Chlorhexidine Gluconate32 claims
- Amoxicillin28 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Tze-Foun Tsiang among 17,852 general practice dentistry records in California
Tze-Foun Tsiang, DDS,MSD 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 2007, is newer than 29% of them.
- NPI issued2007 · 29% of these records are older, 40% 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 updated2010 · 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).
94 general practice dentistry records list a practice address in San Mateo
They are 94 of the 3,909 NPPES records with a practice address in San Mateo, and 17,852 general practice dentistry records in California.
All 17,852 in California → Every provider in San Mateo → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Mark Abramson, D D SSan Mateo, CA 944011457371197
- Sean Bardsley, D.D.S.San Mateo, CA 944011164529012
- Richard Gregory, DDSSan Mateo, CA 944011356382626
- Hubert Lee, DDSSan Mateo, CA 944011508836677
- Allen Lee, D.M.D.San Mateo, CA 944011760585038
- Anna Liviz, D.D.S.San Mateo, CA 944011144247107
- Tatyana Manyak, DDSSan Mateo, CA 944011477572501
- Gordon Nagare, DDSSan Mateo, CA 944011215043476
Common questions
What is Tze-Foun Tsiang, DDS,MSD's NPI number?
Tze-Foun Tsiang, DDS,MSD's National Provider Identifier (NPI) is 1780801886, issued on Apr 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tze-Foun Tsiang, DDS,MSD located?
The NPPES record lists a practice address at 320 N San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 348-3328. Providers update this record themselves, so call before visiting.
How can I verify Tze-Foun Tsiang, DDS,MSD's license?
NPPES lists California license number D48394, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tze-Foun Tsiang, DDS,MSD prescribe under Medicare Part D?
In 2024, Tze-Foun Tsiang, DDS,MSD had 66 Medicare Part D claims for 32 beneficiaries; the average among general practice dentistry prescribers was 83. Part D covers Medicare prescriptions 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.