Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Jon E Hershkowitz, MD

Individual provider Internal Medicine Physician · NPI 1811985203

Dr. Jon E Hershkowitz, MD practises Internal Medicine in Summit, New Jersey. Graduated from Hahneman Medical College of the Pacific in 1991, 35 years ago. Practices with Barnabas Health Medical Group, PC, a 255-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
35
Trained at
Hahneman Medical College of the Pacific
Licensed in
NJ
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

120 Summit Ave Summit Medical Group
Summit, NJ 07901-2804
Phone: (908) 277-8880
Fax: (908) 277-8779
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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 MA69995 (NJ)
Hospitalist Physician Taxonomy 208M00000X · Licence MA69995 (NJ)

Record details

NPI number1811985203
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 10, 2005
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolHAHNEMAN MEDICAL COLLEGE OF THE PACIFIC
Graduated 1991 (35 years in practice)
Group practice Barnabas Health Medical Group, Pc — 255 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients294
Services billed 694 a service is one billed item, such as a visit, a test or a procedure
Average patient age63

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Barnabas Health Medical Group, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 255 clinicians in the practice; 12 are shown here.

Other providers in Summit