Gerry Mullin
Experienced in Hemorrhagic Proctocolitis

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

Experienced in Hemorrhagic Proctocolitis
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 Experienced provider by MediFind in the treatment of Hemorrhagic Proctocolitis. 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 5 articles in the study of Hemorrhagic Proctocolitis.

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.

Find your insurance
Find your insuranceClose

Accepted insurance plans:

Aetna
  • EPO
  • HMO
  • POS
  • PPO
Anthem
  • EPO
  • HMO
  • POS
  • PPO
Blue Cross Blue Shield
  • EPO
  • HMO
  • POS
  • PPO
Blue Shield of California
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE-MEDICAID PLAN
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Capital Blue Cross
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • OTHER MEDICARE PART D
  • PPO
CareFirst
  • HMO
  • POS
  • PPO
Cigna
  • EPO
  • HMO
  • PPO
First Health
  • INSURANCE PLAN
  • MEDICARE PDP
  • PPO
Geisinger
  • HMO
  • POS
  • PPO
Health Care Services Corporation
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • OTHER COMMERCIAL
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
  • PPO
Highmark
  • EPO
  • HMO
  • PPO
Humana
  • HMO
  • INDEMNITY
  • POS
  • PPO
Independent Health
  • EPO
  • POS
  • PPO
Johns Hopkins Healthcare
  • HMO
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE-MEDICAID PLAN
Managed Medicaid
  • OTHER MANAGED MEDICAID
Medicaid
  • OTHER MEDICAID
  • STATE MEDICAID
TeamCare
  • OTHER COMMERCIAL
UnitedHealthcare
  • EPO
  • HMO
  • POS
  • PPO
Wellcare
  • EPO
  • HMO
  • INSURANCE PLAN
  • MANAGED MEDICAID PLAN
  • MEDICARE MAPD
  • MEDICARE PDP
  • MEDICARE SNP
  • MEDICARE-MEDICAID PLAN
  • OTHER MEDICARE
  • OTHER MEDICARE PART D
View 14 Less Insurance Carriers -

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
Elite in Hemorrhagic Proctocolitis
Dr. Geoffrey C. Nguyen
Gastroenterology
Elite in Hemorrhagic Proctocolitis
Dr. Geoffrey C. Nguyen
Gastroenterology
600 N Wolfe St, 
Baltimore, MD 
 (0.1 miles away)
410-955-2635
Languages Spoken:
English

Geoffrey Nguyen is a Gastroenterologist in Baltimore, Maryland. Dr. Nguyen is rated as an Elite provider by MediFind in the treatment of Hemorrhagic Proctocolitis. His top areas of expertise are Viral Gastroenteritis, Ulcerative Colitis, Hemorrhagic Proctocolitis, Endoscopy, and Colonoscopy.

Raymond Cross
Elite in Hemorrhagic Proctocolitis
Dr. Raymond Cross
Gastroenterology
Elite in Hemorrhagic Proctocolitis
Dr. Raymond Cross
Gastroenterology

St Paul Place Specialists, Inc.

301 Saint Paul St, 
Baltimore, MD 
 (1.2 miles away)
410-659-2800
Languages Spoken:
English
See accepted insurances
Offers Telehealth

Raymond Cross is a Gastroenterologist in Baltimore, Maryland. Dr. Cross is rated as a Distinguished provider by MediFind in the treatment of Hemorrhagic Proctocolitis. His top areas of expertise are Crohn's Disease, Ulcerative Colitis, Viral Gastroenteritis, Endoscopy, and Colonoscopy.

Mark Lazarev
Distinguished in Hemorrhagic Proctocolitis
Dr. Mark Lazarev
Gastroenterology
Distinguished in Hemorrhagic Proctocolitis
Dr. Mark Lazarev
Gastroenterology

Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville

2360 West Joppa Road, Joppa Concourse STE 205, Joppa Concourse STE 205, 
Lutherville, MD 
 (10.1 miles away)
410-933-7495
Languages Spoken:
English
See accepted insurances
Offers Telehealth

Dr. Lazarev joined Johns Hopkins from the Mount Sinai Medical Center in New York, where he completed the Present-Levison advanced inflammatory bowel disease fellowship. A specialist in the diagnosis and management of Crohn's disease and ulcerative colitis, Dr. Lazarev has published numerous peer-reviewed articles, abstracts and chapters. Dr. Lazarev is rated as a Distinguished provider by MediFind in the treatment of Hemorrhagic Proctocolitis. His top areas of expertise are Crohn's Disease, Viral Gastroenteritis, Ulcerative Colitis, Colonoscopy, and Endoscopy.

VIEW MORE HEMORRHAGIC PROCTOCOLITIS 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
ConditionClose
    • 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.
      See more Colitis experts
    • Colonoscopy
      Dr. Mullin is
      Advanced
      . Learn about Colonoscopy.
      See more Colonoscopy experts
    • Crohn's Disease
      Dr. Mullin is
      Advanced
      . Learn about Crohn's Disease.
      See more Crohn's Disease experts
    • 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.
      See more Gas Bloat Syndrome experts
    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
    Want to save this doctor for later?
    Sign Up
    Is this your doctor?
    Find A Second Opinion
    Not sure about your diagnosis?
    Check Your Symptoms
     
     
     
     
    Learn about our expert tiers
    Learn More
    Are you the provider on this profile?
    Claim Profile
    For Patients
    • Our Story
    • How MediFind Works
    • Conditions A-Z
    • Doctor Directory
    • Symptoms Directory
    • Procedures Directory
    • Treatment Directory
    • Drug Directory
    • Infusion Center Finder
    • FAQ
    • Contact Us
    For Providers and Practices
    • Claim Your Profile
    • Newsroom
    Business Solutions
    • Provider
    • Network Solutions
    Additional Resources
    • Consumer Health Data Privacy Policy
    • Privacy Policy
    • Terms of Use
    • Advertising Policy
    • Content Policy
    Subscribe to our newsletter

    Sign up to stay informed about MediFind and get wellness sent your way.

    Close

      By subscribing, I agree to MediFind's Terms of Use, Privacy Policy and Consumer Health Data Privacy Policy, as applicable.

      Bullet PinMediFind
      Follow us on
      This information is not intended as a substitute for informed medical advice. You should work with a licensed professional to diagnose and treat health conditions. We let the data speak for itself, MediFind does not endorse any healthcare providers.
      © 2026 All Rights Reserved

      Request an Appointment

      If you are experiencing a medical emergency, call 9-1-1.

      MediFind will contact the provider for your appointment request. You’ll receive status updates by email. Your provider or MediFind will reach out to you directly by phone or email to schedule your appointment or request additional information.

      Patient Details

      This information is for the patient who will be seen at the appointment.

        Close

        Returning patient? Use your address on file with the provider.

        Insurance Details

        Please provide information of the primary insurance holder as the practice may require this information to schedule.

        Insurance Provider *
        Insurance ProviderClose

        Appointments Details

        Let’s get more information about your appointment.

                0 / 1000
                0 / 1000
                By pressing the Submit button you are agreeing to MediFind’s Terms of Use, Privacy Policy and Consumer Health Data Privacy Policy, as applicable.