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Dr. John H Marks MD is a male Colon/Rectal Surgeon, has 21 years of experience and practices in Colon & Rectal Surgery and Surgery.
Video profile
Dr. John Marks has 2 office locations.
100 E Lancaster Ave
Ste 330
Wynnewood, PA 19096

Phone Number
Locations and availability (2)
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

  • Currently 3 of 4 stars
Patient comments (5)

The overall average patient rating of Dr. John Marks is Good. Dr. Marks has been reviewed by 12 patients who have provided 5 comments. The rating is 3 out of 4 stars.

Patient Ratings
Ease of Appointment 3.3
  • Currently 3.25 of 4 stars
Promptness 2.5
  • Currently 2.4545454545455 of 4 stars
Courteous Staff 3.2
  • Currently 3.1666666666667 of 4 stars
Accurate Diagnosis 3.3
  • Currently 3.25 of 4 stars
Bedside Manner 2.9
  • Currently 2.9166666666667 of 4 stars
Spends Time with Me 3.1
  • Currently 3.0833333333333 of 4 stars
Follows Up After Visit 3.0
  • Currently 3 of 4 stars

Specialties & Research

Dr. John Marks, MD is board certified in Colon & Rectal Surgery and Surgery.

  • He has special expertise in 2 areas:
  • Colorectal Cancer
  • Colorectal Surgery

Education & Awards

Dr. Marks graduated from Thomas Jefferson University, Philadelphia. He has 12 awards.

Atlanta, Georgia - March 2000.
Established and directed the newly instituted International Fellowship in colorectal Surgical Oncology at the Lankenau Institute for Medical Research - November 2000.
Selected by Richard Wolf Instrumentation Company in 2001 to head one of two training centers established in the United States for Transanal Endoscopic Microsurgery (TEM).
2011 - TOP DOCTOR - Colon & Rectal Surgeon
Society of American Gastrointestinal Endoscopic Surgeons Meeting of the Millennium
Seminar on Transanal Endoscopic Microsurgery (TEM)
U.S. News & World Report
Faculty Member & Selected Presenter
Castle Connolly America's Top Doctors® (2014)
Castle Connolly America's Top Doctors® for Cancer (2014)
Castle Connolly's Top Doctors™ (2013)


Dr. Marks has 20 hospital affiliations:

  • Main Line Hospital - Bryn Mawr 
  • Main Line Hospital Lankenau 

Accepted Insurance Plans

Dr. Marks accepts these health insurances in at least one office:

  • Aetna - 3 plans
  • United Healthcare - 17 plans
  • Independence Blue Cross - 5 plans
  • Great-West Healthcare - 3 plans
  • Unicare - 13 plans
  • Oxford Health Plans - 2 plans
  • Evercare - 1 plan
  • Cigna - 15 plans
  • Humana - 9 plans


  • French

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Additional Information
Where does Dr. John H. Marks practice?
Dr. John Marks practices Colon & Rectal Surgery and Surgery near Wynnewood, PA.
See Wynnewood Surgeons.