Summary

Dr. Mark Donowitz is a gastroenterologist and internal medicine physician who earned his medical degree from Johns Hopkins University School of Medicine. With 58 years of experience in practice, he brings extensive knowledge to the care of digestive health conditions and general internal medicine needs. Dr. Donowitz speaks English and has dedicated his career to helping patients with complex gastrointestinal disorders.

He practices at The Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center in Baltimore, Maryland. Dr. Donowitz specializes in treating conditions such as short bowel syndrome, iron deficiency anemia, and vitamin D deficiency. His expertise includes performing home infusion therapy for patients who require specialized nutritional support. Patients have given Dr. Donowitz an average rating of 4.9 out of 5 stars.

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 board certifications
  • 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, APRNDr. Richard James Breyer, MD
GastroenterologyGastroenterologyGastroenterologyDiagnostic Radiology
Accepts New Patients Accepts New Patients
4.9 
58 Years of Experience 26 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: WAKE FOREST 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 active medical license in the state of Maryland.

Medical License

Medical Doctor with an active medical license in the state of Maryland that expires 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

Where is Dr. Mark Donowitz's office located?
Dr. Mark Donowitz's office is located at 720 Rutland Ave, Baltimore, MD, 21205.
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.
How can I make an appointment with Dr. Mark Donowitz?
You can find contact information for Dr. Mark Donowitz here on Vitals.
Does Dr. Mark Donowitz accept my insurance?
You can see the insurance plans that Dr. Mark Donowitz accepts on their Vitals profile.
What languages does Dr. Mark Donowitz speak?
Dr. Mark Donowitz speaks English.

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