James Kostek, DO
Family Medicine Physician · Summit, NJ
James Kostek, DO is a family medicine physician with a practice address in Summit, New Jersey, and NPI 1477085660, issued on Mar 28, 2017. Check the license (New Jersey 25MB10822000, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- James Kostek
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 25MB10822000 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 99 Beauvoir Ave, Summit, NJ 07901
- Phone
- (908) 522-2000
- Enumerated
- Mar 28, 2017
- Record last updated
- Sep 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201014003375); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,770 in New Jersey → Look up another NPI →
Also registered at 99 Beauvoir Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Clariza Abad, AGNP-CNurse Practitioner1518500149
- Hana Abd El Meguid, MDStudent in an Organized Health Care Education/Training Program1881514859
- Alexandra Adams, MDStudent in an Organized Health Care Education/Training Program1164981924
- Ifeanyichukwu Adibemma, MDStudent in an Organized Health Care Education/Training Program1164361416
- Sohail Adonimohammed, MDStudent in an Organized Health Care Education/Training Program1255133005
- Igor Agaronin, MDHospitalist Physician1295797215
Verify James Kostek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MB10822000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average family medicine physician in 2024
494 Medicare Part D claims for 84 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium55 claims
- Amlodipine Besylate29 claims
- Spironolactone21 claims
- Levothyroxine Sodium20 claims
- Ozempic16 claims
- Estradiol (Once Weekly)15 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: $64.66
4 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, 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
- Rwjbh Primary Care ServicesSomerville, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Kostek among 2,770 family medicine physician records in New Jersey
James Kostek, DO is one of 2,770 family medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 79% of them.
- NPI issued2017 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2017 · median 2006 among the 1,875 with a school on file
- Record last updated2020 · 59% 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 New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 family medicine physician records list a practice address in Summit
They are 27 of the 1,151 NPPES records with a practice address in Summit, and 2,770 family medicine physician records in New Jersey.
All 2,770 in New Jersey → Every provider in Summit → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Elise Butkiewicz, MDSummit, NJ 079011023196979
- Marnie Doubek, M.D.Summit, NJ 079011720070980
- Elizabeth Fagan, MDSummit, NJ 079011295707156
- Susan Kaye, M.DSummit, NJ 079011760404115
- Steven Levine, D.O.Summit, NJ 079011891794251
- Jennifer May-Ortiz, MDSummit, NJ 079011316939168
- Sarah Murray, M.D.Summit, NJ 079011851683833
- Samantha Pozner, MDSummit, NJ 079011225039670
Common questions
What is James Kostek, DO's NPI number?
James Kostek, DO's National Provider Identifier (NPI) is 1477085660, issued on Mar 28, 2017. An NPI identifies a provider in billing; it is not a license.
Where is James Kostek, DO located?
The NPPES record lists a practice address at 99 Beauvoir Ave, Summit, NJ, 07901. Phone: (908) 522-2000. Providers update this record themselves, so call before visiting.
How can I verify James Kostek, DO's license?
NPPES lists New Jersey license number 25MB10822000, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Kostek, DO prescribe under Medicare Part D?
In 2024, James Kostek, DO had 494 Medicare Part D claims for 84 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.