Jay R. Thomas, MD
Internal Medicine Physician · South Pasadena, CA
Jay R. Thomas, MD is an internal medicine physician with a practice address in South Pasadena, California, and NPI 1013092980, issued on Oct 26, 2006. Check the license (California A55197, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jay R. Thomas
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A55197 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1624 Bank St, South Pasadena, CA 91030
- Phone
- (626) 487-0036
- Enumerated
- Oct 26, 2006
- Record last updated
- Jun 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A551970 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Jay R. Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A55197Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average internal medicine physician in 2024
314 Medicare Part D claims for 60 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium28 claims
- Levothyroxine Sodium24 claims
- Metformin Hcl16 claims
- Mirtazapine13 claims
- Pantoprazole Sodium13 claims
- Furosemide12 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: $48.38
2 payments; by number, the most common kind was food and beverage; the largest payer was Endovascular Engineering 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.
Jay R. Thomas among 17,696 internal medicine physician records in California
Jay R. Thomas, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in South Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Christopher Jong, M.D.South Pasadena, CA 910301336336700
- Lauren KarpSouth Pasadena, CA 910301760772065
- Dolly Kim, MD MBASouth Pasadena, CA 910301023212487
- Carolyn Lamb, M.D.,South Pasadena, CA 910301841374642
- Christina Stiles, M.D.South Pasadena, CA 910301750679908
- Beauty Swe, MDSouth Pasadena, CA 910301548234479
- Liviu Chindris, M.DSierra Madre, CA 910241730156472
- Linda Crawford, DOSierra Madre, CA 910241841360427
Common questions
What is Jay R. Thomas, MD's NPI number?
Jay R. Thomas, MD's National Provider Identifier (NPI) is 1013092980, issued on Oct 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jay R. Thomas, MD located?
The NPPES record lists a practice address at 1624 Bank St, South Pasadena, CA, 91030. Phone: (626) 487-0036. Providers update this record themselves, so call before visiting.
How can I verify Jay R. Thomas, MD's license?
NPPES lists California license number A55197, 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 Jay R. Thomas, MD prescribe under Medicare Part D?
In 2024, Jay R. Thomas, MD had 314 Medicare Part D claims for 60 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.