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Internist, Gastroenterologist (digestive)
44 years of experience
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).

Learn more about Dr. John Madsen:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. John Madsen is Good. Dr. Madsen has been reviewed by 2 patients who have provided 1 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 3.7
Bedside Manner 3.0
Spends Time with Me 3.0
Follows Up After Visit 3.0

Specialties & Research

Dr. John Madsen, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 9 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colon Cancer
  • Colonoscopy
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Liver Diseases
  • Ulcerative Colitis
  • Viral Human Hepatitis

Education & Awards

Dr. Madsen graduated from Cornell University, New York.


Dr. Madsen has 2 hospital affiliations:

  • Lawrence & Memorial Hospital 
  • Lawrence And Memorial Hospital, New London CT 


  • English

> > > > Dr. John Madsen, MD

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Additional Information
Dr. John Edward Madsen MD is a male Internist, has 44 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. John E. Madsen practice?
Dr. John Madsen has 1 office location.
Dr. John Madsen practices Internal Medicine and Gastroenterology near New London, CT.
See New London Internists and New London Gastroenterologists.