Pediatric Gastroenterologists in Connecticut
Data updated monthly · Last refresh October 2026
32 Pediatric Gastroenterology providers practice in Connecticut. The largest concentration is in Hartford. 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.
32providers
Hartfordtop city
Pediatric Gastroenterology by city in Connecticut
Choose a city to see providers there.
Where Pediatric Gastroenterologists in Connecticut practice
From CMS Medicare enrollment records covering 14 of the 32 providers listed here (44%). Providers who do not bill Medicare are not included in these figures.
0%solo or small practice (under 10 clinicians)
0%mid-size group (10 to 99)
100%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Pediatric Gastroenterologists | All clinicians in group | Main city |
| Yale University | 10 | 2,632 | New Haven |
| Connecticut Children's Specialty Group, Inc. | 4 | 144 | Hartford |
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 Connecticut
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. Danya Rosen, M.D.Greenwich, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Bella Zeisler, MDHartford, CT · $129 in drug and device payments (2025) ·
(860) 545-9560 Dr. Francisco Sylvester, MDHartford, CT · $17 in drug and device payments (2025) ·
(860) 545-9560 Dr. Franziska Mohr, MDHartford, CT · No drug or device payments recorded (2025) ·
(860) 545-9560 Dr. Jeffrey Hyams, MDHartford, CT · $21,897 in drug and device payments (2025) ·
(860) 545-9560 Dr. Jing MarreroHartford, CT · $130 in drug and device payments (2025) ·
(860) 545-9000 Dr. Jonathan Salazar, MDHartford, CT · $120 in drug and device payments (2025) ·
(860) 545-9560 Dr. Karan Emerick, MDHartford, CT · $321 in drug and device payments (2025) ·
(860) 545-9560 Dr. Katherine Baldwin, M.D.Hartford, CT · $115 in drug and device payments (2025) ·
(860) 545-9560 Dr. Melissa Fernandes, MDHartford, CT · No drug or device payments recorded (2025) ·
(860) 545-9560 Dr. Panamdeep Kaur, MDHartford, CT · $195 in drug and device payments (2025) ·
(860) 545-9000 Dr. Peter Townsend, M.D.Hartford, CT · $125 in drug and device payments (2025) ·
(860) 545-9000 Dr. Sarita Singhal, MDHartford, CT · No drug or device payments recorded (2025) ·
(860) 837-5170 Dr. Sydney Kuzoian, DOHartford, CT · $1,158 in drug and device payments (2025) ·
(860) 545-9000 Dr. Victoria Grossi, D.O.Hartford, CT · $201 in drug and device payments (2025) ·
(860) 545-9973 Dr. Zev Davidovics, M.D.Hartford, CT · No drug or device payments recorded (2025) ·
(860) 545-9560 Dr. Aileen Raizner, M.D.New Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Alexander Koral, MDNew Haven, CT · $375 in drug and device payments (2025) ·
(203) 785-4649 Dr. Arik Alper, M.D.New Haven, CT · No drug or device payments recorded (2025) ·
(203) 688-2259 Dr. Chelsea LepusNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4081 Dr. Dean Yimlamai, M.D., PH.D.New Haven, CT · No drug or device payments recorded (2025) ·
(203) 737-4218 Dr. Dinesh Pashankar, MBBSNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4081 Dr. Eric Gershon, MDNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Leonel Rodriguez, MDNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Pamela Valentino, M.D.New Haven, CT · $15,202 in drug and device payments (2025) ·
(203) 785-4649 Dr. Ricardo Arbizu Alvarez, M.D.New Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Richard Rosencrantz, M.D.New Haven, CT · $63 in drug and device payments (2025) ·
(203) 785-4649 Dr. Rima Fawaz, MDNew Haven, CT · $7,162 in drug and device payments (2025) ·
(203) 785-4649 Dr. Sandra Escalera, MDNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Uma Phatak, MDNew Haven, CT · No drug or device payments recorded (2025) ·
(203) 785-4649 Dr. Kim-doan Nguyen, M.D.Stamford, CT · No drug or device payments recorded (2025) ·
(314) 888-5233 Dr. Annette Vannilam, MDWestport, CT · $59 in drug and device payments (2025) ·
(860) 545-9560 Common questions
How many Pediatric Gastroenterology providers are in Connecticut?There are 32 Pediatric Gastroenterology providers with active NPI records practicing in Connecticut, according to federal NPPES data refreshed monthly.
Which cities in Connecticut have the most Pediatric Gastroenterology providers?Hartford (15), New Haven (14), Westport (1) have the highest concentration of Pediatric Gastroenterology providers in Connecticut.
How many Pediatric Gastroenterology providers in Connecticut received drug or device company payments?16 of 32 Pediatric Gastroenterology providers in Connecticut (50%) 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.
Do most Pediatric Gastroenterologists in Connecticut work in independent practices or large health systems?Among 14 Pediatric Gastroenterologists in Connecticut enrolled in Medicare, 0% bill through a solo or small practice with fewer than 10 clinicians, 0% through a mid-size group of 10 to 99, and 100% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
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