Carol Stewart-Hayostek, MD
Family Medicine Physician · Bakersfield, CA
Carol Stewart-Hayostek, MD is a family medicine physician with a practice address in Bakersfield, California, and NPI 1508880618, issued on Jul 26, 2006. Check the license (California G85518, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carol Stewart-Hayostek
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G85518 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7800 Niles St, Bakersfield, CA 93306
- Phone
- (661) 328-4284
- Enumerated
- Jul 26, 2006
- Record last updated
- Dec 30, 2022
- Fax
- (661) 616-9980
- Medicaid ID
- 00G855180 CA
- Medicare enrollment
- Enrolled (PECOS I20090710000194); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 7800 Niles St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Carol Stewart-Hayostek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G85518Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average family medicine physician in 2024
378 Medicare Part D claims for 115 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl41 claims
- Atorvastatin Calcium27 claims
- Lisinopril27 claims
- Losartan Potassium25 claims
- Gabapentin19 claims
- Amlodipine Besylate17 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: $43.79
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Clinica Sierra VistaFresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carol Stewart-Hayostek among 17,133 family medicine physician records in California
Carol Stewart-Hayostek, MD is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1988 · median 2005 among the 10,652 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
209 family medicine physician records list a practice address in Bakersfield
They are 209 of the 11,539 NPPES records with a practice address in Bakersfield, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Bakersfield → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
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- Bradley Davis, DOBakersfield, CA 933061255321204
- Mansukh Ghadiya, MDBakersfield, CA 933061972537736
- Claudia Jonah, M.D.Bakersfield, CA 933061366654303
- John Miller, M.D.Bakersfield, CA 933061578577227
Common questions
What is Carol Stewart-Hayostek, MD's NPI number?
Carol Stewart-Hayostek, MD's National Provider Identifier (NPI) is 1508880618, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carol Stewart-Hayostek, MD located?
The NPPES record lists a practice address at 7800 Niles St, Bakersfield, CA, 93306. Phone: (661) 328-4284. Providers update this record themselves, so call before visiting.
How can I verify Carol Stewart-Hayostek, MD's license?
NPPES lists California license number G85518, 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 Carol Stewart-Hayostek, MD prescribe under Medicare Part D?
In 2024, Carol Stewart-Hayostek, MD had 378 Medicare Part D claims for 115 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.