Ryan Vaca is an Oncology physician affiliated with Avera Health. OpenAlex indexes 14 publications with 278 citations (h-index 6).
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.
Metabolism & gastrointestinal
28.8%Corticosteroid14.4%Prednisone100%Part D≥26 patientsSerotonin-3 Receptor Antagonist10.7%Ondansetron Odt52%Ondansetron Hcl49%Part D≥23 patients+ 1 more class in this area
Cancer & immunology
27.6%Cytochrome P450 17A1 Inhibitor10.9%Abiraterone Acetate100%Part D≥13 patientsAndrogen Receptor Inhibitor5.3%Xtandi100%Part D<11 patients+ 4 more classes in this area
Nervous system
17.3%Phenothiazine8.3%Prochlorperazine Maleate100%Part D≥35 patientsGabapentinoids3.9%Gabapentin100%Part D<11 patients+ 2 more classes in this area
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
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Heidi McKean, MD
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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.”