Dr. William J. Kostis, MD, PhD

Dr. Kostis practices at Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health.

Dr. Kostis' NPI, 1922203439, was assigned on June 15, 2007. Dr. Kostis graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) in 2007. Dr. Kostis holds New Jersey license 25MA09632800.

Dr. Kostis' primary practice is Robert Wood Johnson University Hospital, at One Robert Wood Johnson Place, New Brunswick, NJ 08901 in Middlesex County. The practice phone is (732) 828-3000. Dr. Kostis also practices at Robert Wood Johnson University Hospital - New Brunswick, 1 Robert Wood Johnson Pl, New Brunswick, NJ 08901.

Dr. Kostis' primary practice is Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health. Dr. Kostis is also affiliated with JFK University Medical Center. The medical group on file is Rutgers-RWJ Scleroderma Program. Dmand AI also links Dr. Kostis to 3 more hospitals and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kostis practices, 6 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Kostis' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Kostis' licenses on file in 2 states: New Jersey and Massachusetts.

CMS data shows 4,182 Medicare services from Dr. Kostis across 16 procedure codes in 2024, for 2,396 Medicare patients. Medicare paid $117,727 for them.

CMS counts 2,396 Medicare patients who saw Dr. Kostis in 2024. The largest group is 75 to 84, with 901 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 2.27, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Kostis' median patient age at 72, with 41% women.

In 2024, Dr. Kostis wrote 1,413 Medicare Part D claims for 209 patients. 77% of them were for generic drugs. CMS names the drug for 1,256 of them, across 27 drugs with 11 or more claims each, at $371,741 in total drug cost. In 2023, CMS named 1,391 claims across 32 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Kostis for performance year 2024, reported as part of a group. Dr. Kostis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 35 procedures of pacemaker insertion or repair by Dr. Kostis, more than 82% of the clinicians it reports for that procedure.

Dmand AI links 79 papers to Dr. Kostis, published from 2010 to 2025. 2020 was the busiest year, with 11. The most frequent topics are Hypertension, Myocardial Infarction and Antihypertensive Agents. Dr. Kostis has published most often in Am J Cardiol. Dr. Kostis' most frequent co-authors are William Chandler Cushman, MD, John Kassotis, MD and John S. Pantazopoulos, MD.

CMS Open Payments shows 46 general payments to Dr. Kostis from 13 drug and device companies from 2016 to 2024. Consulting fees make up the largest share, 41% of the total. Abbott Laboratories paid the most, $3,923.

Dr. Kostis graduated from Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) in 2007.