David Hass is a Gastroenterology physician affiliated with Yale University. OpenAlex indexes 49 publications with 899 citations (h-index 9).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
2200 Whitney Ave
Suite 360
Hamden, CT 06518
Telephone
203-281-4469Provider last certified this registry record 27 May 2021.
Industry payments
27 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Medtronic, Inc.Program year20254 payments
- ABBVIE INC.Program year202515 payments
- Takeda Pharmaceuticals U.S.A., Inc.Program year20254 payments
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Metabolism & gastrointestinal
91.6%Proton pump inhibitor52.9%Pantoprazole Sodium33%Omeprazole32%Dexlansoprazole Dr17%Esomeprazole Magnesium9%Lansoprazole4%Rabeprazole Sodium3%Dexilant2%Part D<11 patientsH2 blocker14.3%Famotidine100%Part D≥45 patients+ 8 more classes in this area
Nervous system
3.8%Tricyclic Antidepressant2.3%Nortriptyline Hcl100%Part D<11 patientsPhenothiazine1.5%Prochlorperazine Maleate100%Part D<11 patientsSensory organs
2.1%Corticosteroid2.1%Hydrocortisone100%Part D≥13 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Artificial Intelligence for Gastroenterology Practice: A Modified Delphi Consensus
The American Journal of Gastroenterology
2026 - A Primer for Discussing Complementary and Integrative Medicine in Gastroenterology Settings
Neurogastroenterology & Motility
2026 - Beyond Medication: Integrative and Nutrition Therapies for Disorders of Gut-Brain Interaction.
PubMed
2026 - Wood-loving magic mushrooms from Australia are saprotrophic invaders in the Northern Hemisphere
Fungal Systematics and Evolution
2024 - S463 The Role of Generative Language Systems in Increasing Patient Awareness of Colon Cancer Screening
The American Journal of Gastroenterology
2024
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A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments — shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”