The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection :1
internal medicine
systematic reviews
clinical guidelines
health research methodology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,633
23,000
0.897
* Total Citation Counts Rankings
Ranking Based On Selection :2
General Internal Medicine
Perioperative Medicine
Medical Education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,210
9,074
0.409
* Total Citation Counts Rankings
Ranking Based On Selection :3
Allergy
Immunology
Anaphylaxis
Internal Medicine
Meta-analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,613
14,731
0.944
* Total Citation Counts Rankings
Ranking Based On Selection :4
Hospital Care
General Internal Medicine
Epidemiologic Methods
Big Data
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,163
3,940
0.430
* Total Citation Counts Rankings
Ranking Based On Selection :5
Internal Medicine
Clinical Epidemiology
Biostatistics
Evidence-based medicine
Meta-analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,714
4,303
0.641
* Total Citation Counts Rankings
Ranking Based On Selection :6
Internal Medicine
Perioperative Medicine
Cardiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,650
3,172
0.869
* Total Citation Counts Rankings
Ranking Based On Selection :7
addiction medicine
substance use
health services
social epidemiology
implementation science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,389
2,392
0.706
* Total Citation Counts Rankings
Ranking Based On Selection :8
Internal Medicine
Medical Education
Evidence Based Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,990
1,499
0.501
* Total Citation Counts Rankings
Ranking Based On Selection :9
Interventional Cardiology
Vascular Biology
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,143
2,033
0.949
* Total Citation Counts Rankings
Ranking Based On Selection :10
Internal Medicine
Infectious Diseases
Immunology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,045
1,469
0.718
* Total Citation Counts Rankings
Ranking Based On Selection :11
Cardiovascular Disease
Epidemiological Studies
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,933
1,158
0.599
* Total Citation Counts Rankings
Ranking Based On Selection :12
Obesity Medicine
Cardiac Disease Prevention
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
978
515
0.527
* Total Citation Counts Rankings
Ranking Based On Selection :13
General Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
923
506
0.548
* Total Citation Counts Rankings
Ranking Based On Selection :14
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
675
437
0.647
* Total Citation Counts Rankings
Ranking Based On Selection :15
Internal Medicine - Cardiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
649
452
0.696
* Total Citation Counts Rankings
Ranking Based On Selection :16
Rheumatology
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
646
406
0.628
* Total Citation Counts Rankings
Ranking Based On Selection :17
Quality Improvement
General Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
643
556
0.865
* Total Citation Counts Rankings
Ranking Based On Selection :18
Cardiac Imaging
Heart Failure
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
586
577
0.985
* Total Citation Counts Rankings
Ranking Based On Selection :19
General Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
467
160
0.343
* Total Citation Counts Rankings
Ranking Based On Selection :20
Internal Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
433
427
0.986
* Total Citation Counts Rankings
Ranking Based On Selection :21
Infectious Diseases
Internal Medicine
Clinical Informatics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
357
269
0.754
* Total Citation Counts Rankings
Ranking Based On Selection :22
Inflammatory Bowel Disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
315
166
0.527
* Total Citation Counts Rankings
Ranking Based On Selection :23
Hematology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
294
291
0.990
* Total Citation Counts Rankings
Ranking Based On Selection :24
Internal Medicine
Endocrinology
Infectious Disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
291
290
0.997
* Total Citation Counts Rankings
Ranking Based On Selection :25
Internal Medicine - Non communicable diseases - Cardiovascular sciences - Metabolism - Genetic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
274
111
0.405
Arnav Agarwal
University of Toronto
Toronto, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,633
23,000
0.897
internal medicine
systematic reviews
clinical guidelines
health research methodology
Ameen Patel
McMaster University
Hamilton, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,210
9,074
0.409
General Internal Medicine
Perioperative Medicine
Medical Education
Derek Chu
McMaster University
Hamilton, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,613
14,731
0.944
Allergy
Immunology
Anaphylaxis
Internal Medicine
Meta-analysis
Fahad Razak
University of Toronto
Toronto, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,163
3,940
0.430
Hospital Care
General Internal Medicine
Epidemiologic Methods
Big Data
Usman Ali
McMaster University
Hamilton, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,714
4,303
0.641
Internal Medicine
Clinical Epidemiology
Biostatistics
Evidence-based medicine
Meta-analysis
Flavia Kessler Borges
McMaster University
Hamilton, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,650
3,172
0.869
Internal Medicine
Perioperative Medicine
Cardiology
Thomas D Brothers
Dalhousie University
Halifax, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,389
2,392
0.706
addiction medicine
substance use
health services
social epidemiology
implementation science
Rodrigo B Cavalcanti
University of Toronto
Toronto, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,990
1,499
0.501
Internal Medicine
Medical Education
Evidence Based Medicine
Richard G Jung
Université d'Ottawa
Ottawa, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,143
2,033
0.949
Interventional Cardiology
Vascular Biology
Internal Medicine
Mark Verway
McGill University
Montréal, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,045
1,469
0.718
Internal Medicine
Infectious Diseases
Immunology
Nariman Sepehrvand
University of Alberta
Edmonton, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,933
1,158
0.599
Cardiovascular Disease
Epidemiological Studies
Internal Medicine
Yashar Tashakkor
University of British Columbia
Vancouver, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
978
515
0.527
Obesity Medicine
Cardiac Disease Prevention
Nikesh Adunuri
Western University Canada
London, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
923
506
0.548
General Internal Medicine
Sagar Rohailla
University of Toronto
Toronto, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
675
437
0.647
Walid Barake
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
649
452
0.696
Internal Medicine - Cardiology
Kyle M. Walker
Université d'Ottawa
Ottawa, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
646
406
0.628
Rheumatology
Internal Medicine
Michael Prystajecky
University of Saskatchewan
Saskatoon, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
643
556
0.865
Quality Improvement
General Internal Medicine
Khalil Anchouche
McGill University
Montréal, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
586
577
0.985
Cardiac Imaging
Heart Failure
Sharon E Card
University of Saskatchewan
Saskatoon, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
467
160
0.343
General Internal Medicine
Ahmad F. Alenezi
McGill University
Montréal, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
433
427
0.986
Stephen Lee
University of Saskatchewan
Saskatoon, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
357
269
0.754
Infectious Diseases
Internal Medicine
Clinical Informatics
Vadim Iablokov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
315
166
0.527
Inflammatory Bowel Disease
Ibraheem Othman
Saskatchewan Cancer Agency
Saskatoon, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
294
291
0.990
Jimmy M. Hsu
McGill University
Montréal, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
291
290
0.997
Internal Medicine
Endocrinology
Infectious Disease
Brice Nouthe
University of British Columbia
Vancouver, Canada
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
274
111
0.405
Internal Medicine - Non communicable diseases - Cardiovascular sciences - Metabolism - Genetic