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Gastro Center of Maryland

Gastroenterology specialists located in Annapolis, Columbia, Olney, Riverdale, and Timonium, Maryland.


Welcoming New Patients!

Dear Patient,

Face masks are strongly encouraged but not required in all our locations. Gastro Center of Maryland is constantly working to ensure our patients have access to the care and resources they need in the safest possible setting. Our top priority is your health and safety.

To schedule please call 410-290-6677. As always, please contact us with any questions or concerns.


Doctors and Staff of Gastro Center of Maryland

About Gastro Center of Maryland

Gastro Center of Maryland, with locations in Annapolis, Columbia, Olney, Riverdale, and Timonium Maryland, is a medical facility that offers treatment for a variety of gastrointestinal and liver disorders:

  • Management of a complete range of Gastrointestinal, Liver and Pancreatic disorders, including Acid reflux/GERD, Stomach ulcers, Celiac disease, Irritable bowel syndrome, Colitis & Crohn’s Disease, Liver disease, Hemorrhoids and Constipation, Rectal bleeding etc.
  • Onsite Ambulatory Surgery Centers with State of the Art HD equipment, GI Genius™GIQuiC participation, and with accreditation from the Accreditation Associates for Abulatory Health Care, Inc. (AAAHC.)
  • Innovative and cutting edge Diagnostics and Medical Treatment- including Bravo pH Testing, PillCam SB Capsule Endoscopy, STRETTA anti-reflux procedure, Orbera intragastric balloon procedure for weight loss and more.
  • IBD Infusion Center for Biologic (Remicade, Entyvio, Stelara) and Injectafer infusions.

These are only a few of the many gastrointestinal conditions treated on a regular basis. Patients are offered individualized treatment plans based on state-of-the-art diagnostic tools and techniques that provide them with accurate and complete information. The professional staff at the facility have many years of experience to provide their patients with the most innovative and advanced treatments possible. The Providers focus on a comprehensive and Integrative treatment plan.

Gastro Center of Maryland is currently welcoming new patients, call or book an appointment online today!

Custom testimonials

  • "Everyone at the office is wonderful"

    —Anne S.

  • "The Annapolis office was a delight to visit. Everyone answered my questions and calmed my fears. I have no problem with my doctor conducting my procedure in a few weeks."


  • "I have been happy with the staff and care I've received here so far satisfied with my overall experience"

    —BONNIE K.

  • "Highly recommend Dr. Rosenbloom. I went to see him with some concerns and had a ton of anxiety and fear. "

    —BRETT C.

  • "All of the staff are really nice and helpful. Colleen Abell is so easy to talk to, she listens to what you have to say and is determined to help with the any concerns ..."


  • "Dr. Rosenbloom is the best . He takes the time to listen and after suffering for 3 yrs going back and forth to my primary. Dr . Rosenbloom figured out exactly what I ..."


  • "Very friendly each and everyone is ready to help you at every step. I love going there."

    —ASHVIN S.

  • "Been a patient for about a year now. Dr. Castillo is fantastic, along with Colleen. She was very attentive to my concerns and showed a lot of compassion. Would highly ..."

    —ANGELA O.

Welcome To Our Practice

Meet Our Team

Our services are provided by board-certified gastroenterologist and qualified providers who are committed to providing the highest quality GI care.

Your health matters to us!


photo of Gastro Center of Maryland     photo of Gastro Center of Maryland 

Major Insurance Providers Accepted

Gastro Center of Maryland is currently in network with most major insurance plans, including private insurance plans, federally sponsored plans, and covered Maryland plans. GCM’s goal is to provide accessible and affordable healthcare to patients in Maryland and the surrounding DMV area. Below is a list of most insurance plans GCM is currently in network with, if there is a specific plan you are looking for that is not listed below, please contact our office or the insurance company.

If you have any questions, please contact our office we will be happy to help!

View Accepted Insurance Plans

AETNA Better Health
Blue Cross Blue Shield
John Hopkins Health Care
Maryland Physicians Care
Priority Partners
United Healthcare

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Choose your preferred location




7120 Minstrel Way, Suite #100 & #211, Columbia, MD 21405

7130 Minstrel Way, Suite #217, Columbia, MD 21405




3407 Olandwood Court, Suite #102, Olney, MD 20832




6502 Kenilworth Avenue, Suite #100, Riverdale, MD 20737



Timonium / Lutherville

1212 York Rd, Suite B201, Lutherville, MD 21093