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

Mark Koshar, MD

Individual provider Internal Medicine Physician · NPI 1538161963

Mark Koshar, MD practises Internal Medicine in Easton, Pennsylvania. Graduated from Rutgers New Jersey Medical School in 1974, 52 years ago. Practices with Lehigh Valley Physician Group, a 2,493-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
52
Trained at
Rutgers New Jersey Medical School
Licensed in
PA
In the registry since
2005
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

3735 Nazareth Rd Ste 301
Easton, PA 18045-8338 Not confirmed with CMS for 10 years — call before visiting
Phone: (610) 829-2200
Fax: (610) 829-2211
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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 MD016576E (PA)

Record details

NPI number1538161963
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 15, 2005
Last updated in NPPESMarch 2, 2016

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1974 (52 years in practice)
Group practice Lehigh Valley Physician Group — 2493 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

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 patients510
Services billed 6,054 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 Lehigh Valley Physician Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2493 clinicians in the practice; 12 are shown here.

Other providers in Easton