Sabrina Witherby is an Oncology physician affiliated with Brown University. OpenAlex indexes 16 publications with 868 citations (h-index 8); ClinicalTrials.gov lists 1 registered study matched to this name.
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
593 Eddy Street
Apc Main
Providence, RI 029034923
Telephone
401-444-5435Registry record last updated 13 Jun 2018.
Clinical trials
- Vaginal Testosterone Cream For Atrophic Vaginitis in Women Taking Aromatase Inhibitors for Breast Cancer.
Sponsor: University of Vermont
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 (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.
Cancer & immunology
79.2%Aromatase Inhibitor61.9%Letrozole68%Anastrozole23%Exemestane9%Part D<11 patientsKinase inhibitor11.2%Verzenio68%Kisqali32%Part D<11 patients+ 2 more classes in this area
Sensory organs
10.6%Corticosteroid10.6%Dexamethasone100%Part D≥18 patientsMetabolism & gastrointestinal
6.6%Serotonin-3 Receptor Antagonist6.6%Ondansetron Hcl100%Part D≥24 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.
- Fulfilling the Role of a Parent While Undergoing Treatment for Cancer
American Journal of Clinical Oncology
2024
Similar KOLs
Other experts from the same institution or the same specialty.
Frank Sellke, MD
Brown University
Josiah Rich, MD
Brown University
Donald Coustan, MD
Brown University
Audrey Tyrka, MD, PhD
Brown University
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.”