Norman Nishioka is a Gastroenterology physician affiliated with Massachusetts General Hospital. OpenAlex indexes 291 publications with 9,790 citations (h-index 55); ClinicalTrials.gov lists 6 registered studies matched to this name. By OpenAlex citation count, this profile ranks in the top 10% of Gastroenterology profiles in the findmyKOL directory.
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 fundingClinical trials
- Adenoma Detection Rate With a New Pediatric Colonoscope With a Short Turn Radius (Pentax Retroview) Compared With a Standard Pentax Pediatric Colonoscope
Sponsor: Massachusetts General Hospital
- Comparison of Treatments for Barrett's Esophagus With High-Grade Dysplasia/Early Adenocarcinoma
Sponsor: Massachusetts General Hospital
- Effect of Video Monitor Size on Adenoma Detection Rate
Sponsor: Massachusetts General Hospital
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.
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
96.2%Osmotic Laxative62.3%Gavilyte-G95%Peg-3350 And Electrolytes5%Part D≥310 patientsProton pump inhibitor34%Omeprazole82%Pantoprazole Sodium10%Esomeprazole Magnesium8%Part D<11 patientsBlood & clotting
3.8%Solutions for parenteral nutrition3.8%Peg 3350-Electrolyte100%Part D≥20 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 2001–2002 per NIH RePORTER. The latest:
- ENHANCED PHOTODYNAMIC TREATMENT OF BARRETT'S ESOPHAGUS
Massachusetts General Hospital
FY2002P01CA084203 - ENHANCED PHOTODYNAMIC TREATMENT OF BARRETT'S ESOPHAGUS
Massachusetts General Hospital
FY2001P01CA084203
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.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Esophageal-guided biopsy with volumetric laser endomicroscopy and laser cautery marking: a pilot clinical study
Gastrointestinal Endoscopy
2014 - Safety and efficacy of endoscopic spray cryotherapy for Barrett's esophagus with high-grade dysplasia
Gastrointestinal Endoscopy
2010
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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.”