Emerald S. Tay, M.D
Internal Medicine Physician · San Gabriel, CA
Emerald S. Tay, M.D is an internal medicine physician with a practice address in San Gabriel, California, and NPI 1255331294, issued on Jul 29, 2005. Check the license (California A72223, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Emerald S. Tay
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A72223 CA
Self-reported in NPPES; status is on the state search - Practice location
- 222 E Valley Blvd, San Gabriel, CA 91776
- Phone
- (626) 307-8636
- Enumerated
- Jul 29, 2005
- Record last updated
- Dec 21, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (626) 307-8705
- Medicaid ID
- 00A722230 CA
- Medicare enrollment
- Enrolled (PECOS I20100701000251); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 222 E Valley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yuanli Fang, ACUPUNCTUREAcupuncturist1386819944
Verify Emerald S. Tay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72223Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average internal medicine physician in 2024
9,848 Medicare Part D claims for 385 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 19 claims were for opioids.
Most prescribed
- Losartan Potassium641 claims
- Atorvastatin Calcium557 claims
- Amlodipine Besylate410 claims
- Omeprazole343 claims
- Metformin Hcl290 claims
- Vascepa261 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: $380.52
13 payments; by number, the most common kind was food and beverage; the largest payer was Ironwood Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Emerald S. Tay among 17,696 internal medicine physician records in California
Emerald S. Tay, M.D is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 internal medicine physician records list a practice address in San Gabriel
They are 24 of the 762 NPPES records with a practice address in San Gabriel, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Gabriel → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kenneth Chan, M.D.San Gabriel, CA 917761861422370
- Michelle Chan, M.D.San Gabriel, CA 917761043326283
- Araceli Chanbonpin, M.D.San Gabriel, CA 917761962572909
- Jennifer Chen, MDSan Gabriel, CA 917761548335516
- Le-Young Lee, MDSan Gabriel, CA 917761861417586
- Su Lee, M.D.San Gabriel, CA 917761871510370
- Charles Lin, MDSan Gabriel, CA 917761982719225
- Garry Pratt, MDSan Gabriel, CA 917761679592281
Common questions
What is Emerald S. Tay, M.D's NPI number?
Emerald S. Tay, M.D's National Provider Identifier (NPI) is 1255331294, issued on Jul 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Emerald S. Tay, M.D located?
The NPPES record lists a practice address at 222 E Valley Blvd, San Gabriel, CA, 91776. Phone: (626) 307-8636. Providers update this record themselves, so call before visiting.
How can I verify Emerald S. Tay, M.D's license?
NPPES lists California license number A72223, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Emerald S. Tay, M.D prescribe under Medicare Part D?
In 2024, Emerald S. Tay, M.D had 9,848 Medicare Part D claims for 385 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.