Joyce Matsumoto is a Neurology physician affiliated with University of California, Los Angeles. OpenAlex indexes 45 publications with 1,889 citations (h-index 21).
Overview
Scholarship
indexed output and impact (OpenAlex)Publications indexed by OpenAlex, matched via ORCID. Counts exclude supporting files.
Citations across these publications.
H-index from these publications.
Clinical & industry
trials, payments and federal fundingIndustry payments
18 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- UCB, Inc.Program year202511 payments
- JAZZ PHARMACEUTICALS INC.Program year20254 payments
- NEUROPACE, INC.Program year20254 payments
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
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.
Nervous system
100%Benzodiazepine84%Clobazam43%Lorazepam40%Diazepam18%Part D<11 patientsOther antiepileptics16%Xcopri100%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.
- Tandem metabolic reaction–based sensors unlock in vivo metabolomics
Proceedings of the National Academy of Sciences
2025
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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. Reviewed account links and congress post links can appear separately. Absence of a section means “not yet looked,” never “none found.”