Leo Orr is an Oncology physician affiliated with LAC+USC Medical Center. OpenAlex indexes 9 publications with 252 citations (h-index 7).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
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.
Musculoskeletal
75.8%RANK Ligand Inhibitor75.8%Denosumab100%Part B, office-administered≥28 patientsMetabolism & gastrointestinal
6.7%Serotonin-3 Receptor Antagonist6%Ondansetron hydrochloride91%Ondansetron Hcl9%Part D + Part B≥12 patientsOsmotic Laxative0.4%Lactulose100%Part D<11 patients+ 1 more class in this area
Sensory organs
6.5%Corticosteroid6.5%Dexamethasone sodium phosphate100%Part B, office-administered≥12 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.
Similar KOLs
Other experts from the same institution or the same specialty.
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.”