Summary

Dr. Mark Donowitz has practiced gastroenterology and internal medicine for 58 years, treating short bowel syndrome, malabsorption syndromes, and amyloidosis, and performing home infusion therapy. He is affiliated with The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center.

Dr. Donowitz earned his medical degree from Johns Hopkins University School of Medicine and sees patients in Baltimore, Maryland. Patients on Vitals rate Dr. Donowitz 4.86 out of 5.

Overview based on verified provider data

Quick Facts

  • 4.9
  • 58 years of experience
  • speaks English
  • Johns Hopkins University School Of Medicine
  • 1 written review
  • 2 specialties
  • 13 areas of expertise
  • 2 hospital affiliations
  • 3 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Mark Donowitz has 3 locations

Dr. Mark Donowitz

720 Rutland AveBaltimore, MD 21205

The Johns Hopkins Hospital

1800 Orleans StBaltimore, MD 21287

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Dr. Mark Donowitz, MDSarah Proffit, APRNBrendon Bower, APRNFelicia Feixia Wang
GastroenterologyGastroenterologyGastroenterologyDiagnostic Radiology
Accepts New Patients Accepts New Patients Accepts New Patients
4.9 
0 
0 
0 
58 Years of Experience 2 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available No Virtual Visit Option
Speaks English Speaks English Speaks English
Baltimore , MDBaltimore , MDTempe , AZBaltimore , MD
Med School: Johns Hopkins University School Of Medicine Med School: Wilmington University Med School: University of Cincinnati Med School: Johns Hopkins University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark Donowitz

  • Accepts Medicare

Medical Specialties

Dr. Mark Donowitz has the following 2 specialties

Specialty Expertise

Dr. Mark Donowitz has the following 13 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Diarrhea
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Short Bowel Syndrome
  • Ulcerative Colitis

Certifications, License, & Education

58 Years Experience

Dr. Mark Donowitz holds an expired medical license in the state of Maryland.

Medical License

Medical Doctor with an expired medical license in the state of Maryland that expired in 2026.

Education & Training

Medical School

Graduated from Johns Hopkins University School Of Medicine in 1968.

NPI Number

Dr. Donowitz's NPI number is 1306893342.

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Frequently Asked Questions

Which hospitals is Dr. Mark Donowitz affiliated with?
Dr. Mark Donowitz is affiliated with The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center.
Does Dr. Mark Donowitz accept my insurance?
You can see the insurance plans that Dr. Mark Donowitz accepts on their Vitals profile.
How can I make an appointment with Dr. Mark Donowitz?
You can find contact information for Dr. Mark Donowitz here on Vitals.
Is Dr. Mark Donowitz accepting new patients?
Dr. Mark Donowitz has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
What languages does Dr. Mark Donowitz speak?
Dr. Mark Donowitz speaks English.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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