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).
Learn more about Dr. John Marks:
View the full profile to get information on:
- What's important to you
View full profile
- Currently 3.5 of 4 stars
The overall average patient rating of Dr. John Marks is Excellent.
|Ease of Appointment||
|Spends Time with Me||
|Follows Up After Visit||
Specialties & Research
Dr. John Marks, MD is board certified in Colon & Rectal Surgery.
- He has special expertise in 2 areas:
- Colorectal Cancer
- Colorectal Surgery
Education & Awards
Dr. Marks graduated from Thomas Jefferson University, Philadelphia. He has 5 awards.
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
Similar doctors nearby
- Additional Information
- Where does Dr. John H. Marks practice?
Dr. John Marks practices Colon & Rectal Surgery near Wynnewood, PA.
See Wynnewood Surgeons.