Pediatric Gastroenterologists in Maryland
Data updated monthly · Last refresh October 2026
34 Pediatric Gastroenterology providers practice in Maryland. The largest concentration is in Baltimore. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
34providers
Baltimoretop city
Pediatric Gastroenterology by city in Maryland
Choose a city to see providers there.
Where Pediatric Gastroenterologists in Maryland practice
From CMS Medicare enrollment records covering 4 of the 34 providers listed here (12%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Pediatric Gastroenterologists | All clinicians in group | Main city |
| Johns Hopkins University | 3 | 2,886 | Baltimore |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Pediatric Gastroenterology providers in Maryland
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Samantha Butzke, MDAnnapolis, MD · $2,645 in drug and device payments (2025) ·
(410) 224-4887 Dr. Atiye Aktay, MDBaltimore, MD · $43 in drug and device payments (2025) ·
(410) 328-7373 Dr. Benjamin Caballero, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 955-8769 Dr. Brynn O'laughlin, MDBaltimore, MD · $110 in drug and device payments (2025) ·
(410) 601-8663 Dr. David Tuchman, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 601-8333 Dr. Donna Zeiter, MDBaltimore, MD · No drug or device payments recorded (2025) ·
(410) 328-0812 Dr. Douglas Jacobstein, M.D.Baltimore, MD · $176 in drug and device payments (2025) ·
(410) 601-8663 Dr. Howard Kader, M.D.Baltimore, MD · $55 in drug and device payments (2025) ·
(410) 328-6749 Dr. Jay Perman, MDBaltimore, MD · No drug or device payments recorded (2025) ·
(410) 328-6749 Dr. Kalpana Hughes, MDBaltimore, MD · No drug or device payments recorded (2025) ·
(410) 601-8663 Dr. Kenneth Ng, D.O.Baltimore, MD · $166 in drug and device payments (2025) ·
(410) 955-8769 Dr. Lina Diaz Calderon, M.D.Baltimore, MD · $69 in drug and device payments (2025) ·
(410) 328-7373 Dr. Maria Oliva-hemker, M.D.Baltimore, MD · $2,853 in drug and device payments (2025) ·
(410) 955-8769 Dr. Melissa Shapiro, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 601-8663 Dr. Nidhi Rawal, MDBaltimore, MD · No drug or device payments recorded (2025) ·
(410) 328-6749 Dr. Richard Katz, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 578-8600 Dr. Samra Blanchard, MDBaltimore, MD · No drug or device payments recorded (2025) ·
(410) 328-6749 Dr. Sana Mansoor, M.DBaltimore, MD · $110 in drug and device payments (2025) ·
(410) 601-8663 Dr. Sarah Lowry Adamitis, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 955-8769 Dr. Sara Smith, M.D.Baltimore, MD · $6,688 in drug and device payments (2025) ·
(410) 955-8769 Dr. Shaija Kutty, MDBaltimore, MD · $47 in drug and device payments (2025) ·
(410) 955-0106 Dr. Shelly Joseph, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 955-1464 Dr. Steven Czinn, MDBaltimore, MD · $92 in drug and device payments (2025) ·
(410) 328-6749 Dr. Susan Aucott, M.D.Baltimore, MD · No drug or device payments recorded (2025) ·
(410) 955-2000 Dr. Wikrom Karnsakul, M.D.Baltimore, MD · $308 in drug and device payments (2025) ·
(410) 955-8769 Dr. Bumjin Min, MDBethesda, MD · No drug or device payments recorded (2025) ·
(301) 295-4959 Dr. Carolyn Sullivan Burklow, M.D.Bethesda, MD · No drug or device payments recorded (2025) ·
(301) 319-2825 Dr. Laura Hammon, M.D.Bethesda, MD · No drug or device payments recorded (2025) ·
(301) 400-1667 Dr. Matthew Royall, M.D.Bethesda, MD · No drug or device payments recorded (2025) ·
(301) 295-8098 Dr. Nathalia Albarracin, MDBethesda, MD · No drug or device payments recorded (2025) ·
(301) 295-4959 Dr. Nathan Kolasinski, M.D.Bethesda, MD · No drug or device payments recorded (2025) ·
(301) 295-4959 Dr. Charles Kessler, MDGaithersburg, MD · No drug or device payments recorded (2025) ·
(301) 869-1230 Dr. Boram Ji, M.D.Glen Burnie, MD · $36 in drug and device payments (2025) ·
(410) 787-4000 Dr. Priya Venkataraman Rao, MDGlen Burnie, MD · $46 in drug and device payments (2025) ·
(410) 553-8540 Common questions
How many Pediatric Gastroenterology providers are in Maryland?There are 34 Pediatric Gastroenterology providers with active NPI records practicing in Maryland, according to federal NPPES data refreshed monthly.
Which cities in Maryland have the most Pediatric Gastroenterology providers?Baltimore (24), Bethesda (6), Glen Burnie (2) have the highest concentration of Pediatric Gastroenterology providers in Maryland.
How many Pediatric Gastroenterology providers in Maryland received drug or device company payments?15 of 34 Pediatric Gastroenterology providers in Maryland (44%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
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