Dr. Mark Allendorph MD

Gastroenterologists in Alton, IL

5  Excellent based on 2 reviews | Rate Dr. Allendorph

Dr. Allendorph has been compared

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Dr. Mark Allendorph specializes in gastroenterology, internal medicine in Alton, Illinois.

Dr. Mark Allendorph has been compared 209 times. Details of Dr. Allendorph's 35 years experience as an MD, his hospital affiliation and education at Rosalind Franklin University are available on your free doctor report.


Primary Location for Dr. Allendorph

Dr. Mark Allendorph
2 Memorial Dr
Suite 205
Alton, IL 62002
Neighborhood: Alton

Patient Ratings and Reviews


Dr. Mark Allendorph has an average rating of 5 stars (out of 5) with a rating of Excellent based on 2 reviews.

Have you visited Dr. Mark Allendorph? Rate you experience below.


 Board Certification, Specialty and Expertise

Dr. Mark Allendorph has been identified as specializing in Gastroenterology and Internal Medicine.


  • Gastroenterology
  • Internal Medicine
He is certied by The American Board of Internal Medicine for Gastroenterology and Internal Medicine.

More information available on your free report

Accepted Insurance

Insurance plans and networks accepted by a doctor are not necessarily universal across all locations at which the doctor practices. This can be affected by many factors such as different group practices, hospital affiliations and working arrangements at those locations. Checking that the doctor you are visiting and the facility they are at are in-network providers for your insurance plan can save you money and headaches later from surprise medical bills.

Dr. Mark Allendorph accepts the following plans at 2 Memorial Dr, Alton, IL

  • United Healthcare
  • Unicare
  • Blue Cross Blue Shield of Illinois
  • Evercare

See additional insurance networks accepted by Dr. Allendorph

 Hospital Affiliation

A hospital affiliation covers any doctor who has an affiliation, association or admitting privilege with a hospital. A doctor's particular affiliation to a specific hospital can translate to the overall quality of that provider.

Dr. Allendorph is affiliated with 1 hospital:

Alton Memorial Hospital
1 Memorial Dr
Alton, Illinois


Dr. Allendorph attended medical school at Rosalind Franklin University Chicago Medical School and graduated in 1980 having 35 years experience.

While there is no proven correlation between the quality of one's educational institution and the quality of one's professional competence, it is often an indicator. Medical schools have various levels of selectivity (some are harder to get into than others), and both the quality of their clinical training and level of research are measured. Additional medical training in both residency and fellowships and the facilities they are conducted at also provide a history of the doctors' level of training and experience.


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