Internist, Oncology Specialist (cancer)
35 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. Gregory Harper is Excellent. Dr. Harper has been reviewed by 1 patients who have provided 1 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. Gregory Harper, MD, PHD is board certified in Internal Medicine and Medical Oncology.

  • He has special expertise in 4 areas:
  • AIDS/HIV (Acquired Immunodeficiency Syndrome)
  • Breast Cancer
  • Cancer
  • Infectious Disease

Education & Awards

Dr. Harper graduated from Albany Medical College. He has 1 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Harper has 4 hospital affiliations:

  • Lehigh Valley Hospital 
  • Lehigh Valley Hospital - Muhlenberg 


  • English

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Additional Information
Dr. Gregory R Harper MD and PHD is a male Internist, has 35 years of experience and practices in Internal Medicine and Medical Oncology.
Where does Dr. Gregory R. Harper practice?
Dr. Gregory Harper has 4 office locations.
Dr. Gregory Harper practices Internal Medicine and Medical Oncology near Allentown, PA.
Additional practice locations include: Bethlehem, PA and Pen Argyl, PA.
See Allentown Internists and Allentown Oncologists.