John Marks is a Gastroenterology physician affiliated with Lankenau Medical Center. OpenAlex indexes 207 publications with 4,621 citations (h-index 35); ClinicalTrials.gov lists 2 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingClinical trials
- Feasibility and Safety of Single Port Robot in Colorectal Procedures
Sponsor: Marks Colorectal Surgical Associates
- Maintenance Chemotherapy After Neoadjuvant Chemoradiation Therapy for Distal Rectal Cancer
Sponsor: Marks, John, M.D.
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
11 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
11 companies with payments on record in CMS Open Payments (2021 onward), matched to this physician's NPI. The itemized breakdown by company, amount and year is part of the full profile. Why? →
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Laparoscopic right colectomy: correct technique based on key anatomical principles
Minimally Invasive Therapy & Allied Technologies
2024
Similar KOLs
Other experts from the same institution or the same specialty.
Lawrence Livornese, MD
Lankenau Medical Center
Ali Keramati, MD
Lankenau Medical Center
Jeanine Romanelli, MD
Lankenau Medical Center
Mark Ingerman, MD
Lankenau Medical Center
Charles Rice, MD
The Rockefeller University
Kris Kowdley, MD
Washington State University
Eamonn Quigley, MD
Houston Methodist Hospital and Academic Institute
Patrick Kamath, MD
Mayo Clinic
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments, shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”