Gerry Mullin
Advanced in Gastroparesis

Dr. Gerry Mullin

Gastroenterology
Johns Hopkins Medicine
JH Health Care & Surgery Center – White Marsh
4924 Campbell Boulevard, Suite 110, Suite 110, 
Nottingham, MD 
Offers Telehealth

Advanced in Gastroparesis
Johns Hopkins Medicine
JH Health Care & Surgery Center – White Marsh
4924 Campbell Boulevard, Suite 110, Suite 110, 
Nottingham, MD 
OverviewInsuranceLocationsClinical ResearchSimilar Doctors

Overview

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. Videos Hopkins at Home presents, A Woman's Journey: Is It Celiac Disease?.

Dr. Mullin is rated as an Advanced provider by MediFind in the treatment of Gastroparesis. His top areas of expertise are Small Bowel Bacterial Overgrowth, Irritable Bowel Syndrome (IBS), Diarrhea, Endoscopy, and Colonoscopy.

His clinical research consists of co-authoring 93 peer reviewed articles. MediFind looks at clinical research from the past 15 years. In particular, he has co-authored 1 article in the study of Gastroparesis.

Residency
Mount Sinai Hospital, Medicine, 1988
Specialties
Gastroenterology
Licenses
Internal Medicine in MD
Board Certifications
American Board Of Internal Medicine
Fellowships
University of Arizona Medical Center, Integrative Medicine, 2008
Johns Hopkins University School of Medicine, Gastroenterology, 1991
Hospital Affiliations
The Johns Hopkins Hospital
Johns Hopkins Bayview Medical Center
Languages Spoken
English
Gender
Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

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Accepted insurance plans:

Aetna
  • EPO
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Anthem
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Blue Cross Blue Shield
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Blue Shield of California
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CareFirst
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Independent Health
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Johns Hopkins Healthcare
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Wellcare
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Locations

JH Health Care & Surgery Center – White Marsh
4924 Campbell Boulevard, Suite 110, Suite 110, Nottingham, MD 21236
Call: 410-933-7495

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.


93 Total Publications

Improved Survival in Malnourished COVID-19 Inpatients with Oral Nutrition Supplementation.
Improved Survival in Malnourished COVID-19 Inpatients with Oral Nutrition Supplementation.
Journal: Nutrients
Published: June 06, 2025
View All 93 Publications
Similar Doctors
Robert Bulat
Elite in Gastroparesis
Dr. Robert Bulat
Gastroenterology
Elite in Gastroparesis
Dr. Robert Bulat
Gastroenterology

Johns Hopkins Bayview Medical Center

4940 Eastern Avenue, A Building, Level 03 North, A Building, Level 03 North, 
Baltimore, MD 
 (3.1 miles away)
410-933-7495
Languages Spoken:
English
See accepted insurances
Offers Telehealth

Dr. Bulat joins Johns Hopkins from Tulane University, where he was director of the neurogastroenterology and motility service and director of the GI training program. He specializes in motility and functional disorders, with an emphasis on gastroparesis. He completed his master’s degree (neuroscience) and doctorate (physiology and pharmacology) in the area of smooth muscle function, as well as motility subspecialty training, at McMaster University. Dr. Bulat is an accomplished researcher and has authored several publications and book chapters in his field of interest. Dr. Bulat is rated as a Distinguished provider by MediFind in the treatment of Gastroparesis. His top areas of expertise are Gastroparesis, Gastric Dysmotility, Morning Sickness, Gastrectomy, and Endoscopy.

Mouen Khashab
Elite in Gastroparesis
Dr. Mouen Khashab
Gastroenterology
Elite in Gastroparesis
Dr. Mouen Khashab
Gastroenterology

The Johns Hopkins Hospital

1800 Orleans Street, 
Baltimore, MD 
 (0.1 miles away)
410-955-5000
Languages Spoken:
English, Arabic
See accepted insurances

Gastroenterologist Mouen Khashab specializes in therapeutic endoscopy, and he oversees this group of practitioners across the Johns Hopkins enterprise. Nationally and internationally known in the field of interventional endoscopy, Dr. Khashab has contributed immensely to the field’s advancement as a minimally invasive means to treat gastrointestinal and pancreaticobiliary disorders. Dr. Khashab earned his medical degree from the American University of Beirut Faculty of Medicine, and subsequently completed a residency in internal medicine and a fellowship in gastroenterology at Indiana University. He then completed a two-year fellowship at The Johns Hopkins Hospital before joining the faculty in 2011. A busy researcher, Dr. Khashab has published more than 600 papers in peer-reviewed journals. In 2013, he described the procedure called gastric peroral endoscopic myotomy (known as G-POEM) and was able to disseminate and teach it all over the world. Other procedures that he expanded include peroral endoscopic myotomy (POEM), peroral endoscopic myotomy with fundoplication (POEM-F), Zenker’s peroral endoscopic myotomy (Z-POEM) and full thickness resection. In 2022, he received the Master Endoscopist Award from the American Society for Gastrointestinal Endoscopy (ASGE) for his numerous contributions to the field. His procedural expertise includes endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), interventional EUS, submucosal endoscopy, POEM/achalasia, endoscopic mucosal resection, endoscopic submucosal dissection, luminal stenting, large polyp resection and Barrett’s therapy, among others. Dr. Khashab is involved with multiple gastrointestinal societies and has served on many committees, including the ASGE Standards of Practice Committee, which is in charge of formulating guidelines for the practice of endoscopy. He has also served as an associate editor for the journal Endoscopy, a premier journal in the field. Khashab is a highly sought-after speaker at national and international conferences, and he has participated in multiple live endoscopy conferences. Outside of academic medicine, Dr. Khashab is an entrepreneur. His major interest is in new technology and medical devices, and his goal is to disrupt the field by introducing technology that makes endoscopic procedures safer, easier, efficient and more scalable. Dr. Khashab is rated as an Elite provider by MediFind in the treatment of Gastroparesis. His top areas of expertise are Achalasia, Pancreatic Pseudocyst, Bile Duct Obstruction, Endoscopy, and Gastric Bypass.

Distinguished in Gastroparesis
Dr. Shazia Rashid
Gastroenterology
Distinguished in Gastroparesis
Dr. Shazia Rashid
Gastroenterology

Gastroenterology Associates Of Northern Virginia, LLC

3022 Williams Dr, Suite 301, 
Fairfax, VA 
 (45.4 miles away)
703-698-8960
Languages Spoken:
English, Hindi, Punjabi
See accepted insurances
Accepting New Patients
Offers Telehealth

Shazia Rashid is a Gastroenterologist in Fairfax, Virginia. Dr. Rashid is rated as a Distinguished provider by MediFind in the treatment of Gastroparesis. Her top areas of expertise are Gastroparesis, Gastroesophageal Reflux Disease (GERD), Achalasia, Gastrectomy, and Gallbladder Removal. Dr. Rashid is currently accepting new patients.

VIEW MORE GASTROPARESIS DOCTORS

Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

Find Dr. Mullin's expertise for a condition
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    • Distinguished
    • Small Bowel Bacterial Overgrowth
      Dr. Mullin is
      Distinguished
      . Learn about Small Bowel Bacterial Overgrowth.
      See more Small Bowel Bacterial Overgrowth experts
    • Advanced
    • Colitis
      Dr. Mullin is
      Advanced
      . Learn about Colitis.
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    • Colonoscopy
      Dr. Mullin is
      Advanced
      . Learn about Colonoscopy.
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    • Crohn's Disease
      Dr. Mullin is
      Advanced
      . Learn about Crohn's Disease.
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    • Diarrhea
      Dr. Mullin is
      Advanced
      . Learn about Diarrhea.
      See more Diarrhea experts
    • Endoscopy
      Dr. Mullin is
      Advanced
      . Learn about Endoscopy.
      See more Endoscopy experts
    • Gas Bloat Syndrome
      Dr. Mullin is
      Advanced
      . Learn about Gas Bloat Syndrome.
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    View All 11 Advanced Conditions
    • Experienced
    • Angiodysplasia of the Colon
      Dr. Mullin is
      Experienced
      . Learn about Angiodysplasia of the Colon.
      See more Angiodysplasia of the Colon experts
    • Bowel Incontinence
      Dr. Mullin is
      Experienced
      . Learn about Bowel Incontinence.
      See more Bowel Incontinence experts
    • Celiac Disease
      Dr. Mullin is
      Experienced
      . Learn about Celiac Disease.
      See more Celiac Disease experts
    • Childhood Volvulus
      Dr. Mullin is
      Experienced
      . Learn about Childhood Volvulus.
      See more Childhood Volvulus experts
    • Chronic Erosive Gastritis
      Dr. Mullin is
      Experienced
      . Learn about Chronic Erosive Gastritis.
      See more Chronic Erosive Gastritis experts
    • Colonic Malakoplakia
      Dr. Mullin is
      Experienced
      . Learn about Colonic Malakoplakia.
      See more Colonic Malakoplakia experts
    View All 32 Experienced Conditions
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