Jacob Mark is a Gastroenterology physician affiliated with Children's Hospital Colorado. OpenAlex indexes 66 publications with 202 citations (h-index 8).
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).
Medicare prescribing footprint (2021)
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
54.2%Proton pump inhibitor54.2%Omeprazole100%Part D<11 patientsRespiratory
45.8%Other antihistamines for systemic use45.8%Cyproheptadine Hcl100%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.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Adverse events are lower in unsedated transnasal esophagoscopy versus sedated esophagogastroduodenoscopy
Journal of Pediatric Gastroenterology and Nutrition
2025 - Economic Benefit of Implementation of Pediatric Transnasal Endoscopy in Eosinophilic Esophagitis
Clinical Gastroenterology and Hepatology
2025 - Utility and utilization of transabdominal ultrasound in pediatric patients with acute recurrent or chronic pancreatitis
Journal of Pediatric Gastroenterology and Nutrition
2025
Similar KOLs
Other experts from the same institution or the same specialty.
Margret Bock, MD
Children's Hospital Colorado
Christopher Silliman, MD
Children's Hospital Colorado
Philip Zeitler, MD
Children's Hospital Colorado
Robert Fuhlbrigge, MD, PhD
Children's Hospital Colorado
Charles Rice, MD
The Rockefeller University
Edward Loftus, MD
Mayo Clinic Rochester
Naga Chalasani, MD
Indiana University School of Medicine
Bruce Sands, MD
Icahn School of Medicine at Mount Sinai
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.”