
Highlights
Age Groups Seen
- Young Adult 18-25
- Adult 26-64
- Older Adult 65+
Languages
- English
In-Network Plans
View All Accepted Plans (12)Gender
MaleJohns Hopkins Affiliations:
- Johns Hopkins School of Medicine Faculty
About Gerry Mullin
Professional Titles
- Director, JHH GI Clinical Laboratory
Primary Academic Title
Professor of Medicine
Johns Hopkins Physician
Background
Dr. Mullin is an associate professor of medicine at The Johns Hopkins University School of Medicine. Dr. Mullin has more than 30 years of clinical experience in the field of general gastroenterology. Dr. Mullin is a reviewer and also serves on the editorial board of numerous gastroenterology journals.
Honors
Alpha Omega Alpha (AOA), 1/1/85
Memberships
- Alpha Omega Alpha
- American College of Gastroenterology
- American Gastroenterology Association
Locations
- JH Health Care & Surgery Center – White Marsh
- 4924 Campbell Boulevard, Suite 110, Nottingham, MD 21236
- Get Directions
- phone: 410-933-7495
- fax: 443-442-2018
Expertise
Education
- Fellowship: University of Arizona Health Sciences, Integrative Medicine, 2008
- Fellowship: Johns Hopkins University School of Medicine, Gastroenterology, 1991
- Residency: The Mount Sinai Hospital, Medicine, 1988
- Medical Education: Rutgers New Jersey Medical School, MD, 1985
Board Certifications
- Gastroenterology: American Board of Internal Medicine, 1991
- Internal Medicine: American Board of Internal Medicine, 1988
Insurance
- Aetna
- CareFirst
- Cigna
- First Health
- Geisinger Health Plan
- HealthSmart/Accel
- Johns Hopkins Health Plans
- MultiPlan
- Pennsylvania's Preferred Health Networks (PPHN)
- Point Comfort Underwriters
- Private Healthcare Systems (PHCS)
- Veteran Affairs Community Care Network (Optum-VACCN)
Ratings & Reviews
4.9 out of 5
87 ratings, 35 reviewsThe Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.
- 5 out of 5 starsReviewed on 3/20/2026
Very professional
- 5 out of 5 starsReviewed on 3/17/2026
Excellent and very professional.
- 5 out of 5 starsReviewed on 3/10/2026
Good! I have no complaints.
- 5 out of 5 starsReviewed on 2/25/2026
The best doctor, very compassionate and always explains everything in a way that is easy to understand; he speaks clearly and calmly. Excellent Doctor
- 5 out of 5 starsReviewed on 2/3/2026
Dr Mullin spent a lot of time with me and explained to the procure in detail. He also explained what I have to to optimize the outcome of the procedure.
- 5 out of 5 starsReviewed on 1/28/2026
Dr. Mullin spent a lot of time with me and was able to pull up all of my diagnostic testing from my endoscopies and thoroughly read and share with me all of the informationAnd gave me much needed advice on managing medication and recommendations for my acid reflux. He also set me up with other providers for a possible procedures that may be needed.
- 5 out of 5 starsReviewed on 1/27/2026
Dr. Mullin was very knowledgeable and thorough. He listened to what I had to say attentively, and provided me with a clear plan and excellent recommendations.
- 5 out of 5 starsReviewed on 1/20/2026
Answered all my questions.
- 5 out of 5 starsReviewed on 1/14/2026
My visit was professional and I was very satisfied.
- 5 out of 5 starsReviewed on 1/6/2026
Excellent provider
- 5 out of 5 starsReviewed on 1/6/2026
Dr Mullin was highly recommended as an excellent physician on gastrointestinal disorders.
- 5 out of 5 starsReviewed on 12/23/2025
Knowledgeable, professional and patient
- 5 out of 5 starsReviewed on 12/23/2025
Very knowledgeable and effectively answered all my questions and concerns.
- 5 out of 5 starsReviewed on 12/10/2025
Dr Mullin is excellent
- 5 out of 5 starsReviewed on 12/9/2025
Dr. Mullin was amazing! He was compassionate and showed care, not only for my physical health, but also for my emotional one. He respectfully and patiently listened to my concerns. But most Importantly, he provide an excellent service.
- 5 out of 5 starsReviewed on 12/9/2025
Very friendly appointment was great that what I needed and assured me that I'll be okay
- 5 out of 5 starsReviewed on 12/2/2025
Extremely compassionate, professional, and educated provider. I was especially impressed that Dr. Mullin took the time to read my medical records prior to the appointment to understand my medical history before our first meeting. Dr. Mullin did not rush the appointment and was willing to take time to provide suggestions to improve my health. I would highly recommend Dr. Mullin to friends and family. Highly impressive provider.
- 5 out of 5 starsReviewed on 11/25/2025
I am pleased of service
- 5 out of 5 starsReviewed on 11/11/2025
Dr. Mullin was very nice and caring.
- 5 out of 5 starsReviewed on 11/4/2025
I came in as a new patient. Dr Mullin spoke with and explained possible procedures and outcomes. He has wonderful bed-side manne; therefore he listens and speakers with his patients; not to. Presently he has ordered 3 tests to be completed. However only one has been completed today. The other two very shortly so there could be no test results to be given at this time.
- 5 out of 5 starsReviewed on 9/30/2025
Very thorough, listened, made great recommendations for future procedures.
- 5 out of 5 starsReviewed on 9/23/2025
Very pleasant and and explained any questions I had.
- 5 out of 5 starsReviewed on 9/2/2025
Dr Mullin was very personable even remembering our last visit.
- 5 out of 5 starsReviewed on 8/26/2025
The best
- 5 out of 5 starsReviewed on 8/22/2025
Doctor was very good
- 5 out of 5 starsReviewed on 8/5/2025
Dr Mullin was a pleasure to be assigned to. The Dr. Was very professional and courteous.
- 5 out of 5 starsReviewed on 8/5/2025
Very friendly and respectful
- 5 out of 5 starsReviewed on 7/29/2025
Was very attentive to me
- 5 out of 5 starsReviewed on 7/22/2025
Very pleasant experience with this provider
- 5 out of 5 starsReviewed on 7/22/2025
He is great.
- 5 out of 5 starsReviewed on 6/24/2025
Great visit. As always.
- 5 out of 5 starsReviewed on 6/11/2025
Dr Mullin is the best at what he does he not only help me with the problem I had with him he looked at my chart and held me with other problems that My primary care doctor didn't see
- 5 out of 5 starsReviewed on 5/28/2025
Dr. Mullin is very professional, very welcoming, well prepared, and extremely knowledgeable. I would not trust anyone else with my GI healthcare. He is also very personable and establishes an excellent report with his patients.
- 4 out of 5 starsReviewed on 5/28/2025
Understood by issue and communicated with me some options to treat the symptoms.
- 5 out of 5 starsReviewed on 5/28/2025
Outstanding communication. Answered all of my questions and was incredibly helpful.