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

Gregory Christopher Treharne, MD

Individual provider Radiation Oncology Physician · NPI 1972875763

Gregory Christopher Treharne, MD is a Radiation Oncology in Pottsville, Pennsylvania. Graduated from Tulane University School of Medicine in 2010, 16 years ago. Practices with Geisinger Clinic, a 3,413-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois and Pennsylvania.

Years since qualifying
16
Trained at
Tulane University School of Medicine
Licensed in
IL, PA
In the registry since
2012
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

100 One Norwegian Plz
Pottsville, PA 17901-6029
Phone: (570) 622-8500
Fax: (570) 622-0261
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2614 W Jefferson St, Joliet, IL 60435-6433 — (630) 734-9560
  • 2614 W Jefferson St, Joliet, IL 60435-6433 — (630) 734-9560

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD462891 (PA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 336102126 (IL)

Record details

NPI number1972875763
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 8, 2012
Last updated in NPPESAugust 28, 2020
Certification dateAugust 28, 2020
Mailing address100 N Academy Ave, Danville, PA 17822-4903

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolTULANE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Geisinger Clinic — 3413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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