William J. Kostis, PH.D., M.D.
Internal Medicine Physician · New Brunswick, NJ
William J. Kostis, PH.D., M.D. is an internal medicine physician with a practice address in New Brunswick, New Jersey, and NPI 1922203439, issued on Jun 15, 2007. Check the license (New Jersey 25MA09632800, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William J. Kostis
- Credential
- PH.D., M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 25MA09632800 NJ
240190 MA
Self-reported in NPPES; status is on the state search - Practice location
- 125 Paterson St, New Brunswick, NJ 08901
- Phone
- (732) 235-6561
- Enumerated
- Jun 15, 2007
- Record last updated
- Apr 30, 2024
- Medicare enrollment
- Enrolled (PECOS I20150508001049); accepts Medicare assignment
- Medical or professional school
- Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc), 2007
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Also registered at 125 Paterson St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David AdekanyeStudent in an Organized Health Care Education/Training Program1235712175
- Hesham Ahmed, M.D.Surgical Critical Care Physician1104015056
- Yasemin Akinci, M.D.Student in an Organized Health Care Education/Training Program1912641507
- Catherine Albrecht, FNPNurse Practitioner1710242623
- Louis Amorosa, MDEndocrinology, Diabetes & Metabolism Physician1265519383
- Susan Anderson, R.N.Certified Registered Nurse Anesthetist1154795607
Verify William J. Kostis 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 25MA09632800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,413 Medicare Part D claims for 209 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Metoprolol Succinate248 claims
- Eliquis231 claims
- Atorvastatin Calcium112 claims
- Amiodarone Hcl64 claims
- Xarelto63 claims
- Losartan Potassium58 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $183.09
10 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. 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.
Bills Medicare through one group practice
- Rutgers Health-Rwj Scleroderma ProgramNew Brunswick, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William J. Kostis among 4,632 internal medicine physician records in New Jersey
William J. Kostis, PH.D., M.D. is one of 4,632 internal 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 2007, is newer than 50% of them.
- NPI issued2007 · 50% of these records are older, 41% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2007 · median 2000 among the 3,132 with a school on file
- Record last updated2024 · 63% 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 New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
141 internal medicine physician records list a practice address in New Brunswick
They are 141 of the 2,740 NPPES records with a practice address in New Brunswick, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in New Brunswick → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sheila Curry Bryan, MDNew Brunswick, NJ 089011306895263
- Kim Dixon, M.D.New Brunswick, NJ 089011144262130
- Nayan Kothari, MDNew Brunswick, NJ 089011881648244
- Ibiyonu Lawrence, MDNew Brunswick, NJ 089011508829318
- Beth Lewis, MDNew Brunswick, NJ 089011053362392
- Stephen Marcella, MDNew Brunswick, NJ 089011407865694
- Manish Patel, MDNew Brunswick, NJ 089011013983998
- Audrey Pereira, MDNew Brunswick, NJ 089011922022516
Common questions
What is William J. Kostis, PH.D., M.D.'s NPI number?
William J. Kostis, PH.D., M.D.'s National Provider Identifier (NPI) is 1922203439, issued on Jun 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William J. Kostis, PH.D., M.D. located?
The NPPES record lists a practice address at 125 Paterson St, New Brunswick, NJ, 08901. Phone: (732) 235-6561. Providers update this record themselves, so call before visiting.
How can I verify William J. Kostis, PH.D., M.D.'s license?
NPPES lists New Jersey license number 25MA09632800, 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 William J. Kostis, PH.D., M.D. prescribe under Medicare Part D?
In 2024, William J. Kostis, PH.D., M.D. had 1,413 Medicare Part D claims for 209 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William J. Kostis, PH.D., M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.