John Tayek, M.D.
Endocrinology, Diabetes & Metabolism Physician · Torrance, CA
John Tayek, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Torrance, California, and NPI 1649389644, issued on Aug 30, 2006. Check the license (California G45140, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Tayek
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G45140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21840 Normandie Ave, Torrance, CA 90502
- Phone
- (310) 222-5101
- Enumerated
- Aug 30, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (310) 320-5463
- Medicaid ID
- 00G451400 CA
- Medicare enrollment
- Enrolled (PECOS I20110124000829); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Tayek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,662 Medicare Part D claims for 136 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Atorvastatin Calcium161 claims
- Jardiance86 claims
- Lisinopril65 claims
- Rosuvastatin Calcium54 claims
- Albuterol Sulfate Hfa51 claims
- Metformin Hcl51 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: $14.57
1 payment: food and beverage; the largest payer was Pfizer Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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
- County OF Los AngelesTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Tayek among 1,131 endocrinology, diabetes & metabolism physician records in California
John Tayek, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% 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, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1980 · median 2003 among the 779 with a school on file
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Torrance → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Rajesh Garg, MDTorrance, CA 905021609863190
- Anahita Ghazi, M.D.Torrance, CA 905021588385322
- Andrew Gianoukakis, M.D.Torrance, CA 905021023083086
- Eli Ipp, M.D.Torrance, CA 905021134182629
- Peter Liu, MDTorrance, CA 905021194143271
- Tina Moazezi, DOTorrance, CA 905021891373247
- Aram Mouzeyan, M.D., M.A.Torrance, CA 905021538351812
- Wael Salameh, M.D.Torrance, CA 905021174534317
Common questions
What is John Tayek, M.D.'s NPI number?
John Tayek, M.D.'s National Provider Identifier (NPI) is 1649389644, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Tayek, M.D. located?
The NPPES record lists a practice address at 21840 Normandie Ave, Torrance, CA, 90502. Phone: (310) 222-5101. Providers update this record themselves, so call before visiting.
How can I verify John Tayek, M.D.'s license?
NPPES lists California license number G45140, 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 John Tayek, M.D. prescribe under Medicare Part D?
In 2024, John Tayek, M.D. had 1,662 Medicare Part D claims for 136 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.