William Chey is a Gastroenterology physician affiliated with University of Michigan. OpenAlex indexes 1,012 publications with 47,377 citations (h-index 86); ClinicalTrials.gov lists 3 registered studies matched to this name. By OpenAlex citation count, this profile ranks in the top 1% of Gastroenterology profiles in the findmyKOL directory.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
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
1500 E Medical Center Dr
Ann Arbor, MI 481095000
Telephone
734-936-4000Registry record last updated 24 Jun 2019.
Clinical trials
- Comparison of the Atmo Motility Gas Capsule System to the Reference Standard
Sponsor: Atmo Biosciences Pty Ltd
- Hydrogen Breath Test an Instrument to Predict Rifaximin-Response in Irritable Bowel Syndrome Predominant Diarrhea
Sponsor: University of Michigan
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
14 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Eli Lilly and CompanyProgram year20252 payments
- AnX Robotica CorpProgram year20251 payment
- Salix Pharmaceuticals, a division of Bausch Health US, LLCProgram 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
65.8%Proton pump inhibitor18.8%Omeprazole76%Esomeprazole Magnesium24%Part D<11 patientsGuanylate Cyclase-C Agonist12.3%Linzess100%Part D≥12 patients+ 6 more classes in this area
Cardiovascular
18.8%Bile Acid Sequestrant18.8%Colesevelam Hcl100%Part D<11 patientsHormonal (systemic)
5.5%Somatostatin Analog5.5%Octreotide Acetate100%Part D<11 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.
NIH funding
1 NIH research award on record, funded 1998–2006 per NIH RePORTER. The latest:
- ESOPHAGEAL SENSATION IN PATIENTS WITH HEARTBURN
University of Michigan at Ann Arbor
FY2006$510M01RR000042 - ESOPHAGEAL SENSATION IN PATIENTS WITH HEARTBURN
University of Michigan at Ann Arbor
FY2005$4,632M01RR000042 - DIFFERENTIAL CORTICAL ACTIVATION IN RESPONSE TO VISCERAL &SOMATIC STIMULATION
University of Michigan at Ann Arbor
FY2002M01RR000042
Awards in the NIH RePORTER records where a principal investigator name matches this physician at an organization in their practice state. Latest award years shown; each row links to the project record on RePORTER.
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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.”