Top experts by indication / Neurology
Most active experts in Parkinson's Disease
2026 edition, data as of October 26, 2026
326 key opinion leaders in the directory are tagged to Parkinson's Disease. The tables below rank them by one public measure each: registered trials, citations, NIH awards and congress contributions. Each is a count from a named source, not a judgment about the person, and every row links a profile where the count can be checked.
Most registered trials
Registered clinical trials in this indication on which the person is a listed investigator, counted from ClinicalTrials.gov. 113 of the 326 people tagged to this indication have this count on record; the 25 highest are listed. Source: ClinicalTrials.gov.
| # | Expert | trials |
|---|---|---|
| 1 | Kenneth MarekInstitute for Neurodegenerative Disorders, CT | 11 trials |
| 2 | Rajesh PahwaUniversity of Kansas Medical Center, KS | 10 trials |
| 3 | David RussellPerceptive, CT | 8 trials |
| 4 | Hubert FernandezCleveland Clinic, OH | 8 trials |
| 5 | Neil SussmanPA | 7 trials |
| 6 | Benzi KlugerUniversity of Rochester Medicine, CO | 7 trials |
| 7 | Pinky AgarwalUniversity of Washington, WA | 7 trials |
| 8 | Robert HauserUniversity of South Florida, FL | 7 trials |
| 9 | Jori FleisherNY | 6 trials |
| 10 | Paul TuiteUniversity of Minnesota, MN | 6 trials |
| 11 | Aviva AboschBaptist Health Kenneth C. Griffin Neuroscience Institute, FL | 6 trials |
| 12 | Francisco PonceBarrow Brain and Spine, AZ | 6 trials |
| 13 | William OndoHouston Methodist Hospital, TX | 6 trials |
| 14 | Fernando PaganMedStar Georgetown University Hospital, DC | 5 trials |
| 15 | Karl KieburtzUniversity of Rochester Medical Center, NY | 5 trials |
| 16 | Michael OkunUniversity of Florida College of Medicine, FL | 5 trials |
| 17 | Alexander PantelyatJohns Hopkins University School of Medicine, MD | 5 trials |
| 18 | Aleksandar VidenovicHarvard Medical School, MA | 5 trials |
| 19 | Theresa ZesiewiczUniversity of South Florida Morsani College of Medicine, FL | 5 trials |
| 20 | Roger AlbinUniversity of Michigan, MI | 5 trials |
| 21 | Gonzalo RevueltaMedical University of South Carolina (MUSC), SC | 5 trials |
| 22 | Leslie CloudVirginia Commonwealth University, VA | 4 trials |
| 23 | David StandaertUniversity of Alabama at Birmingham, AL | 4 trials |
| 24 | Corneliu LucaUniversity of Miami, FL | 4 trials |
| 25 | Matthew BrodskyOregon Health & Science University (OHSU), OR | 4 trials |
Most cited
Citations to the person's whole published record in OpenAlex, not only their work in this indication, among the people with at least two registered trials in it. 53 of the 326 people tagged to this indication have at least 2 registered trials in it and this count on record; the 25 highest are listed. Source: OpenAlex.
| # | Expert | citations |
|---|---|---|
| 1 | Bradley BoeveMayo Clinic, MN | 131,039 citations |
| 2 | Christopher GoetzRush University Medical Center, IL | 83,565 citations |
| 3 | Felipe FregniHarvard University, MA | 67,460 citations |
| 4 | Michael OkunUniversity of Florida College of Medicine, FL | 57,857 citations |
| 5 | Roger AlbinUniversity of Michigan, MI | 47,247 citations |
| 6 | Nabila DahodwalaUniversity of Pennsylvania, PA | 41,025 citations |
| 7 | David StandaertUniversity of Alabama at Birmingham, AL | 33,043 citations |
| 8 | Kenneth MarekInstitute for Neurodegenerative Disorders, CT | 32,438 citations |
| 9 | Robert HauserUniversity of South Florida, FL | 31,320 citations |
| 10 | Horacio KaufmannNYU Grossman School of Medicine, NY | 30,903 citations |
| 11 | Stewart FactorEmory University, GA | 29,322 citations |
| 12 | William OndoHouston Methodist Hospital, TX | 27,198 citations |
| 13 | Rajesh PahwaUniversity of Kansas Medical Center, KS | 27,173 citations |
| 14 | Michael SchwarzschildMassachusetts General Hospital, MA | 24,997 citations |
| 15 | Alberto EspayUniversity of Cincinnati, OH | 23,940 citations |
| 16 | Peter LewittWayne State University School of Medicine, MI | 22,843 citations |
| 17 | Karl KieburtzUniversity of Rochester Medical Center, NY | 21,204 citations |
| 18 | Jerrold VitekUniversity of Minnesota Medical School, MN | 19,977 citations |
| 19 | Nader PouratianUT Southwestern Medical Center, CA | 12,150 citations |
| 20 | David RussellPerceptive, CT | 12,113 citations |
| 21 | Jorge Gonzalez-MartinezUniversity of Pittsburgh, PA | 10,335 citations |
| 22 | Michele TagliatiCedars-Sinai Medical Center, CA | 10,266 citations |
| 23 | Aleksandar VidenovicHarvard Medical School, MA | 9,657 citations |
| 24 | Kareem ZaghloulNational Institutes of Health, PA | 9,564 citations |
| 25 | Irene MalatyUniversity of Florida, FL | 9,307 citations |
Most NIH awards
NIH awards on the person's record in NIH RePORTER, across all of their funded work, among the people with at least two registered trials in this indication. 44 of the 326 people tagged to this indication have at least 2 registered trials in it and this count on record; the 25 highest are listed. Source: NIH RePORTER.
| # | Expert | awards |
|---|---|---|
| 1 | Michael SchwarzschildMassachusetts General Hospital, MA | 22 awards |
| 2 | Roger AlbinUniversity of Michigan, MI | 22 awards |
| 3 | Stanley FahnColumbia University, NY | 13 awards |
| 4 | James BennettVA | 12 awards |
| 5 | Michael OkunUniversity of Florida College of Medicine, FL | 12 awards |
| 6 | Nader PouratianUT Southwestern Medical Center, CA | 11 awards |
| 7 | Karl KieburtzUniversity of Rochester Medical Center, NY | 10 awards |
| 8 | Nandakumar NarayananIA | 9 awards |
| 9 | Jerrold VitekUniversity of Minnesota Medical School, MN | 9 awards |
| 10 | Horacio KaufmannNYU Grossman School of Medicine, NY | 8 awards |
| 11 | Ergun UcUniversity of Iowa Hospitals and Clinics, IA | 7 awards |
| 12 | Daniel ClaassenVanderbilt University Medical Center, TN | 7 awards |
| 13 | Aleksandar VidenovicHarvard Medical School, MA | 7 awards |
| 14 | David StandaertUniversity of Alabama at Birmingham, AL | 6 awards |
| 15 | Felipe FregniHarvard University, MA | 6 awards |
| 16 | Casey HalpernUniversity of Pennsylvania, PA | 6 awards |
| 17 | Bradley BoeveMayo Clinic, MN | 6 awards |
| 18 | Harrison WalkerAL | 5 awards |
| 19 | Vikas KotagalUniversity of Michigan, MI | 5 awards |
| 20 | Simon LittleUniversity of California, San Francisco, CA | 4 awards |
| 21 | Jorge Gonzalez-MartinezUniversity of Pittsburgh, PA | 4 awards |
| 22 | James MorleyPA | 3 awards |
| 23 | Benzi KlugerUniversity of Rochester Medicine, CO | 3 awards |
| 24 | Peter LewittWayne State University School of Medicine, MI | 3 awards |
| 25 | Darrin LeeUniversity of Southern California, CA | 3 awards |
Most congress contributions
Congress abstracts and presentations attributed to the person and verified by DOI, across every meeting the directory tracks, among the people with at least two registered trials in this indication. 11 of the 326 people tagged to this indication have at least 2 registered trials in it and this count on record; the 11 highest are listed. Source: Congress abstracts, DOI-verified.
| # | Expert | contributions |
|---|---|---|
| 1 | Nader PouratianUT Southwestern Medical Center, CA | 6 contributions |
| 2 | Benzi KlugerUniversity of Rochester Medicine, CO | 5 contributions |
| 3 | Kareem ZaghloulNational Institutes of Health, PA | 3 contributions |
| 4 | David StandaertUniversity of Alabama at Birmingham, AL | 2 contributions |
| 5 | Joseph NeimatUniversity of Louisville School of Medicine, KY | 2 contributions |
| 6 | Fernando PaganMedStar Georgetown University Hospital, DC | 1 contribution |
| 7 | Michael OkunUniversity of Florida College of Medicine, FL | 1 contribution |
| 8 | Aviva AboschBaptist Health Kenneth C. Griffin Neuroscience Institute, FL | 1 contribution |
| 9 | Vibhor KrishnaUniversity of North Carolina at Chapel Hill, NC | 1 contribution |
| 10 | Bradley BoeveMayo Clinic, MN | 1 contribution |
| 11 | Alberto EspayUniversity of Cincinnati, OH | 1 contribution |
Emerging
10 of the 326 carry the Emerging flag: publication and trial activity rising over the recent three years, in the top ten percent for growth among specialty peers at a similar career stage. Listed A to Z, not ranked; the flag is a yes or nothing, never a score. How the flag is computed.
| Zoe ArvanitakisRush University Medical Center, IL |
| Lawrence ElmerUniversity of Toledo, OH |
| Jeanne FeuersteinCO |
| Paul KotzbauerWashington University School of Medicine in St. Louis, MO |
| Simon LittleUniversity of California, San Francisco, CA |
| Lee NeilsonUniversity of Iowa, IA |
| Nicholas OlneyOR |
| Mahesh PadmanabanUniversity of Chicago, IL |
| Keith VosselUniversity of California, Los Angeles, CA |
| Benjamin WalterCleveland Clinic, OH |
How these tables are computed
The cohort is every profile in the directory tagged to Parkinson's Disease, from the person's registered trials and published research. Only indications with at least 200 tagged people get a page; a smaller cohort would say more about the tag than about the people in it. Each table sorts the cohort by one count, highest first, with no weighting, no blending and no editorial pass. Ties are broken by the profile's stable internal id so the same counts always give the same order. A person with no count on record is left out of that table, not ranked last.
Citations, NIH awards and congress contributions are counts over a person's whole record, not their work in this indication alone, so those three tables are limited to the indication's investigators: people with at least 2 registered trials in it. Without that rule the most cited people in a cohort are the ones whose careers span many diseases, which is a fact about their careers, not about this field. The registered-trials table is the indication-scoped count itself and has no such limit.
The counts are recomputed on every publish and the page carries the date of the publish it was built from. Previous editions are superseded, not archived.
What is deliberately absent
Reported industry payments are on every profile but are not a table here: a count of payers is a fact, and ranking people by it reads as a judgment. Prescribing volume is part of the paid workspace. The directory's influence tier is a judgment and never orders a public page. Sources and methodology.
Filter, sort and open every Parkinson's Disease profile in the directory