World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
91
Citations
42318
World Ranking
11565
National Ranking
5936

Ira Shoulson publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Ira Shoulson sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 280 publications — 13th percentile

13% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Ira Shoulson D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Ira Shoulson sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 91 D-Index — 43rd percentile

43% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Research.com Recognitions

  • 2008 - Member of the National Academy of Medicine (NAM)

Overview

Ira Shoulson is affiliated with Georgetown University in the United States and has a research focus primarily in Medicine, with substantial work in Biochemistry, Genetics, and Molecular Biology. Their published work spans several subfields, notably Neurology, Molecular Biology, Cellular and Molecular Neuroscience, Psychiatry and Mental Health, and Cognitive Neuroscience.

The scientist's research encompasses major topics including Parkinson's Disease Mechanisms and Treatments, Neurological Disorders and Treatments, Genetic Neurodegenerative Diseases, Autism Spectrum Disorder Research, Mitochondrial Function and Pathology, Health Systems, Economic Evaluations, Quality of Life, and RNA Regulation and Disease.

Recent publications by Ira Shoulson include:

  • Effect of Urate-Elevating Inosine on Early Parkinson Disease Progression, 2021, JAMA
  • Genome-wide survival study identifies a novel synaptic locus and polygenic score for cognitive progression in Parkinson's disease, 2021, Nature Genetics
  • Genetic modifiers of Huntington disease differentially influence motor and cognitive domains, 2022, The American Journal of Human Genetics
  • Deep Phenotyping of Parkinson's Disease, 2020, Journal of Parkinson s Disease
  • Innovative Recruitment Strategies to Increase Diversity of Participation in Parkinson's Disease Research: The Fox Insight Cohort Experience, 2020, Journal of Parkinson s Disease

Frequent co-authors collaborating with Ira Shoulson are:

  • Lana M. Chahine
  • Lakshmi Arbatti
  • Abhishek Hosamath
  • David G. Standaert
  • David Oakes

The researcher has several publications in journals including:

  • Journal of Parkinson s Disease (7 publications)
  • Neurology (2 publications)
  • JAMA (1 publication)
  • Nature Genetics (1 publication)
  • The American Journal of Human Genetics (1 publication)

Ira Shoulson was recognized as a Member of the National Academy of Medicine (NAM) in 2008.

Best Publications

  • A polymorphic DNA marker genetically linked to Huntington's disease

    James F. Gusella;Nancy S. Wexler;P. Michael Conneally;Susan L. Naylor

  • Unified huntington’s disease rating scale: Reliability and consistency

    Karl Kieburtz;John B. Penney;Peter Corno;Neal Ranen

  • Levodopa and the progression of Parkinson's disease.

    Fahn S;Oakes D;Shoulson I;Kieburtz K

  • Variable expression of Parkinson's disease A base‐line analysis of the DAT ATOP cohort

    Joseph Jankovic;Michael P McDermott;Jonathan T Carter;Susan A Gauthier

  • Effects of coenzyme Q10 in early Parkinson disease: evidence of slowing of the functional decline.

    Clifford W. Shults;David Oakes;Karl Kieburtz;M. Flint Beal

  • Trinucleotide repeat length instability and age of onset in Huntington's disease

    M Duyao;C Ambrose;R Myers;A Novelletto

  • Pramipexole vs Levodopa as initial treatment for Parkinson disease: A randomized controlled trial

    R. Holloway;I. Shoulson;K. Kieburtz;M. McDermott

  • Effect of deprenyl on the progression of disability in early Parkinson's disease

    I. Shoulson;S. Fahn;D. Oakes;C. Odoroff

  • Venezuelan kindreds reveal that genetic and environmental factors modulate Huntington's disease age of onset

    Nancy S. Wexler;Judith Lorimer;Julie Porter;Fidela Gomez

  • Huntington disease: Clinical care and evaluation

    Ira Shoulson;Stanley Fahn

  • Detection of Huntington’s disease decades before diagnosis: The Predict HD study

    Jane Paulsen;Douglas R Langbehn;Julie C Stout;Elizabeth H Aylward

  • A controlled trial of rasagiline in early Parkinson disease: The tempo study

    Andrew Siderowf;Matthew Stern;Ira Shoulson;Karl Kieburtz

  • Pramipexole vs levodopa as initial treatment for Parkinson disease: a 4-year randomized controlled trial.

    Robert G Holloway;Ira Shoulson;Stanley Fahn;Karl Kieburtz

  • Identification of Genetic Factors that Modify Clinical Onset of Huntington’s Disease

    Jong-Min Lee;Vanessa C. Wheeler;Michael J. Chao;Jean Paul G. Vonsattel

  • CAG repeat not polyglutamine length determines timing of Huntington’s disease onset

    Jong-Min Lee;Kevin Correia;Jacob Loupe;Kyung-Hee Kim

  • Impact of deprenyl and tocopherol treatment on Parkinson's disease in DATATOP patients requiring levodopa

    John B. Penney;David Oakes;Ira Shoulson;Stanley Fahn

  • NMDA receptor losses in putamen from patients with Huntington's disease

    AB Young;JT Greenamyre;Z Hollingsworth;R Albin

  • Homozygotes for Huntington's disease

    Nancy S. Wexler;Nancy S. Wexler;Anne B. Young;Rudolph E. Tanzi;Helen Travers

  • Rate of functional decline in Huntington’s disease

    K. Marder;H. Zhao;R. H. Myers;M. Cudkowicz

  • Alterations in L-glutamate binding in Alzheimer's and Huntington's diseases.

    JT Greenamyre;JB Penney;AB Young;CJ D'Amato

Frequent Co-Authors

Karl Kieburtz
Karl Kieburtz University of Rochester Medical Center
Roger Kurlan
Roger Kurlan Overlook Medical Center
Jane S. Paulsen
Jane S. Paulsen University of Wisconsin–Madison
Michael P. McDermott
Michael P. McDermott University of Rochester
Anthony E. Lang
Anthony E. Lang University of Toronto
Anne B. Young
Anne B. Young Harvard University
Joseph Jankovic
Joseph Jankovic Baylor College of Medicine
Caroline M. Tanner
Caroline M. Tanner University of California, San Francisco
Kenneth Marek
Kenneth Marek Institute for Neurodegenerative Disorders
Marcy E. MacDonald
Marcy E. MacDonald Harvard University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

For students interested in medicine but exploring alternative routes or building their credentials, several online nursing and healthcare programs offer flexible and accelerated options. These pathways can provide a faster entrance into healthcare careers while allowing you to continue working or meet family commitments.

For registered nurses seeking advancement, rn to bsn online no clinicals programs are a popular choice. They allow you to earn your Bachelor of Science in Nursing without the need for additional clinical hours. If you are an LPN aiming to move ahead quickly, explore fast track lpn programs online to reduce your time to certification.

Nurses looking to move into leadership, research, or advanced clinical roles may consider doctoral studies. There are accelerated msn to dnp programs and a range of dnp programs online for those who want the highest qualification in nursing practice. These online programs can help broaden your career options or prepare you for specialized roles in the evolving healthcare landscape.

Best Scientists Citing Ira Shoulson

Trending Scientists

Recently Published Articles