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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).

Patient Reviews

Patient comments (7)

The overall average patient rating of Dr. Marin Marcu is Excellent. Dr. Marcu has been reviewed by 23 patients who have provided 7 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 4.4
Courteous Staff 4.0
Accurate Diagnosis 4.2
Bedside Manner 3.8
Spends Time with Me 4.2
Follows Up After Visit 4.0

Specialties & Research

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Marcu graduated from Universitatea De Medicina Si Farmacie Carol Davila, Bucharest. He has 3 awards.

Compassionate Doctor Recognition (2012)
Top 10 Doctor - Metro Area (2014)
Greater St Louis
On-Time Doctor Award (2014)


Dr. Marcu has 4 hospital affiliations:

  • St Joseph Hospital West 
  • St Joseph Health Center 


  • German
  • Spanish
  • French
  • Romanian
  • English

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Additional Information
Dr. Marin I Marcu MD is a male Internist, has 25 years of experience and practices in Gastroenterology.
Where does Dr. Marin I. Marcu practice?
Dr. Marin Marcu has 1 office location.
Dr. Marin Marcu practices Gastroenterology near Saint Charles, MO.
See Saint Charles Gastroenterologists.