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Gerry Mullin

Gerry Mullin, MD

Gastroenterology

Accepting New Patients
Online Booking

Highlights

Age Groups Seen

  • Young Adult 18-25
  • Adult 26-64
  • Older Adult 65+

Languages

  • English

Gender

Male

Johns 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

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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

  1. JH Health Care & Surgery Center – White Marsh
    • 4924 Campbell Boulevard, Suite 110, Nottingham, MD 21236
    • Get Directions

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

Please contact the location directly to confirm your health plan is accepted.
Search plans
  • 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 reviews

The 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.

Overall Rating by Patient
Provider Listened Carefully
Provider Explained Things Clearly
Provider Knew Medical History
Provider Showed Respect
Provider Spent Enough Time
Search reviews
    5 out of 5 stars
    Reviewed on 3/20/2026

    Very professional

    5 out of 5 stars
    Reviewed on 3/17/2026

    Excellent and very professional.

    5 out of 5 stars
    Reviewed on 3/10/2026

    Good! I have no complaints.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 1/20/2026

    Answered all my questions.

    5 out of 5 stars
    Reviewed on 1/14/2026

    My visit was professional and I was very satisfied.

    5 out of 5 stars
    Reviewed on 1/6/2026

    Excellent provider

    5 out of 5 stars
    Reviewed on 1/6/2026

    Dr Mullin was highly recommended as an excellent physician on gastrointestinal disorders.

    5 out of 5 stars
    Reviewed on 12/23/2025

    Knowledgeable, professional and patient

    5 out of 5 stars
    Reviewed on 12/23/2025

    Very knowledgeable and effectively answered all my questions and concerns.

    5 out of 5 stars
    Reviewed on 12/10/2025

    Dr Mullin is excellent

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 11/25/2025

    I am pleased of service

    5 out of 5 stars
    Reviewed on 11/11/2025

    Dr. Mullin was very nice and caring.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 9/30/2025

    Very thorough, listened, made great recommendations for future procedures.

    5 out of 5 stars
    Reviewed on 9/23/2025

    Very pleasant and and explained any questions I had.

    5 out of 5 stars
    Reviewed on 9/2/2025

    Dr Mullin was very personable even remembering our last visit.

    5 out of 5 stars
    Reviewed on 8/26/2025

    The best

    5 out of 5 stars
    Reviewed on 8/22/2025

    Doctor was very good

    5 out of 5 stars
    Reviewed on 8/5/2025

    Dr Mullin was a pleasure to be assigned to. The Dr. Was very professional and courteous.

    5 out of 5 stars
    Reviewed on 8/5/2025

    Very friendly and respectful

    5 out of 5 stars
    Reviewed on 7/29/2025

    Was very attentive to me

    5 out of 5 stars
    Reviewed on 7/22/2025

    Very pleasant experience with this provider

    5 out of 5 stars
    Reviewed on 7/22/2025

    He is great.

    5 out of 5 stars
    Reviewed on 6/24/2025

    Great visit. As always.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 5/28/2025

    Understood by issue and communicated with me some options to treat the symptoms.

    5 out of 5 stars
    Reviewed on 5/28/2025

    Outstanding communication. Answered all of my questions and was incredibly helpful.