Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William J. Kostis, PHD, MD

Individual provider Internal Medicine Physician · NPI 1922203439

Dr. William J. Kostis, PHD, MD is a Cardiovascular Disease (Cardiology) in New Brunswick, New Jersey. Graduated from Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc) in 2007, 19 years ago. Practices with Rutgers Health-Rwj Scleroderma Program, a 387-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New Jersey.

Years since qualifying
19
Trained at
Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc)
Licensed in
MA, NJ
In the registry since
2007
Specialties on file
6
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

125 Paterson St CAB-5200
New Brunswick, NJ 08901-1962
Phone: (732) 235-6561
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 25MA09632800 (NJ)
Internal Medicine Physician Taxonomy 207R00000X · Licence 240190 (MA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 25MA09632800 (NJ)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 240190 (MA)
Clinical Cardiac Electrophysiology Physician Taxonomy 207RC0001X · Licence 25MA09632800 (NJ)
Clinical Cardiac Electrophysiology Physician Taxonomy 207RC0001X · Licence 240190 (MA)

Record details

NPI number1922203439
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , MD
Sole proprietorNo
NPI enumeratedJune 15, 2007
Last updated in NPPESApril 30, 2024
Certification dateApril 30, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesCARDIAC ELECTROPHYSIOLOGY
Medical schoolRUTGERS R W JOHNSON MEDICAL SCHOOL (CAM/NEW BRUNS/PISC)
Graduated 2007 (19 years in practice)
Group practice Rutgers Health-Rwj Scleroderma Program — 387 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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