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

Dr. John H Marks, MD

Individual provider Colon & Rectal Surgery Physician · NPI 1346212594

Dr. John H Marks, MD is a Colorectal Surgery (Proctology) in Wynnewood, Pennsylvania. Graduated from Jefferson Medical College of Thomas Jefferson University in 1989, 37 years ago. Practices with Main Line Healthcare, a 1,153-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
37
Trained at
Jefferson Medical College of Thomas Jefferson University
Licensed in
PA
In the registry since
2006
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 E Lancaster Ave Ste 330 Lankenau Mob West
Wynnewood, PA 19096-3450
Phone: (610) 645-9093
Fax: (610) 645-9476
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence MD046073L (PA)

Record details

NPI number1346212594
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 2, 2006
Last updated in NPPESOctober 21, 2015
Mailing address100 E Lancaster Ave, Suite 330 Lankenau Mob West, Wynnewood, PA 19096-3450

Medicare enrollment

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

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Medical schoolJEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated 1989 (37 years in practice)
Group practice Main Line Healthcare — 1153 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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