David Tay, M.D.
Specialist · Fremont, CA
David Tay, M.D. is a specialist with a practice address in Fremont, California, and NPI 1962440263, issued on Jun 2, 2006. Check the license (California G63140, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- David Tay
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G63140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 39233 Liberty St, Fremont, CA 94538
- Phone
- (510) 795-8186
- Enumerated
- Jun 2, 2006
- Record last updated
- May 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (510) 792-8186
- Medicaid ID
- 00G631400 CA
- Medicare enrollment
- Enrolled (PECOS I20080417000711); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 39233 Liberty St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Tay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G63140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% more Medicare Part D claims than the average specialist in 2024
2,677 Medicare Part D claims for 325 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Amlodipine Besylate222 claims
- Allopurinol198 claims
- Doxazosin Mesylate179 claims
- Calcitriol155 claims
- Farxiga126 claims
- Losartan Potassium121 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.
Industry payments in 2024: $1,070.20
50 payments; by number, the most common kind was food and beverage; the largest payer was Fresenius USA Marketing, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Tay among 5,749 specialist records in California
David Tay, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1986 · median 1989 among the 1,075 with a school on file
- Record last updated2011 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Fremont → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Michael Bastasch, MDFremont, CA 945381912962028
- Chia-Hui Chen, BSFremont, CA 945381083748289
- Jye-Shern Cheng, M.D.Fremont, CA 945381598729287
- Stefan Haller, M.D.Fremont, CA 945381841232337
- John Jaureguito, MDFremont, CA 945381013044601
- Mimi Lin, M.D.Fremont, CA 945381386608065
- Stephen Nguyen, MDFremont, CA 945381912022443
- Urvashi Patel, P.T.Fremont, CA 945381477640852
Common questions
What is David Tay, M.D.'s NPI number?
David Tay, M.D.'s National Provider Identifier (NPI) is 1962440263, issued on Jun 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Tay, M.D. located?
The NPPES record lists a practice address at 39233 Liberty St, Fremont, CA, 94538. Phone: (510) 795-8186. Providers update this record themselves, so call before visiting.
How can I verify David Tay, M.D.'s license?
NPPES lists California license number G63140, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does David Tay, M.D. prescribe under Medicare Part D?
In 2024, David Tay, M.D. had 2,677 Medicare Part D claims for 325 beneficiaries; the average among specialist prescribers was 1,380. 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.