Chul Hyun is a Gastroenterology physician affiliated with Yale University. OpenAlex indexes 37 publications with 219 citations (h-index 10); ClinicalTrials.gov lists 2 registered studies matched to this name.
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 fundingClinical trials
- Efficacy Study of Atorvastatin to Treat Variant Angina
Sponsor: Samsung Medical Center
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
1 company reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
1 company with payments on record in CMS Open Payments (2021 onward), matched to this physician's NPI. The itemized breakdown by company, amount and year is part of the full profile. Why? →
Medicare prescribing footprint (2023)
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
66.7%Osmotic Laxative34.1%Gavilyte-C73%Gavilyte-G27%Part D≥117 patientsProton pump inhibitor32.6%Pantoprazole Sodium92%Omeprazole8%Part D≥86 patientsAnti-infectives
29.4%Nucleoside and nucleotide reverse transcriptase inhibitors23.7%Tenofovir Disoproxil Fumarate73%Vemlidy27%Part D<11 patientsPenicillins with extended spectrum3%Amoxicillin100%Part D≥13 patients+ 1 more class in this area
Blood & clotting
3.8%Solutions for parenteral nutrition3.8%Peg 3350-Electrolyte100%Part D≥18 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.
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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.”