Citation Rankings
Highly Cited Researchers

Highly Cited Researchers 251 Scientists Citation Rankings - 2025

The Citation Rankings (Highly Cited Researchers) list 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
United States
Thomas Roth
sleep research
sleep medicine
psychopharmaclogy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,791
18,559
0.239
* Total Citation Counts Rankings
Ranking Based On Selection: 2
United States
Stuart C Gordon
Hepatitis
Liver
Viral hepatitis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,202
10,951
0.202
* Total Citation Counts Rankings
Ranking Based On Selection: 3
United States
Mani Menon
oncology
robotic surgery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,301
13,514
0.286
* Total Citation Counts Rankings
Ranking Based On Selection: 4
United States
Steven N Kalkanis
neurosurgery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,989
32,975
0.733
* Total Citation Counts Rankings
Ranking Based On Selection: 5
United States
Rivers, E
sepsis
severe sepsis
septic shock
cardiac arrest
shock
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,778
8,129
0.204
* Total Citation Counts Rankings
Ranking Based On Selection: 6
United States
Henry W Lim
Photodermatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,353
18,312
0.490
* Total Citation Counts Rankings
Ranking Based On Selection: 7
United States
Christine C Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,210
10,671
0.295
* Total Citation Counts Rankings
Ranking Based On Selection: 8
United States
Jonathan K Ehrman
clinical exercise physiology
cardiopulmonary exercise testing
weight management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,902
12,144
0.338
* Total Citation Counts Rankings
Ranking Based On Selection: 9
United States
Timothy Roehrs
sleep
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,506
5,101
0.192

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* Total Citation Counts Rankings
Ranking Based On Selection: 10
United States
Laila Marie Poisson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,071
15,560
0.621
* Total Citation Counts Rankings
Ranking Based On Selection: 11
United States
Nallasivam Palanisamy|Sivam, PN., Nallasivam, P.
Cancer Molecular Cytogenetics
Molecular Pathology and Cancer Genomics
Prostate Cancer
Next
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,142
7,132
0.308
* Total Citation Counts Rankings
Ranking Based On Selection: 12
United States
Benjamin Rybicki
Epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,530
6,123
0.284
* Total Citation Counts Rankings
Ranking Based On Selection: 13
United States
Howard Crawford
Pancreatic Cancer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,293
8,315
0.391
* Total Citation Counts Rankings
Ranking Based On Selection: 14
United States
L Keoki Williams
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,288
9,767
0.506
* Total Citation Counts Rankings
Ranking Based On Selection: 15
United States
Christopher L Drake
sleep disorders
sleep research
insomnia
shift work
sleep reactivity
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,359
10,016
0.546
* Total Citation Counts Rankings
Ranking Based On Selection: 16
United States
Firas Abdollah
Prostate cancer
Bladder cancer
Kidney cancer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,379
7,493
0.431
* Total Citation Counts Rankings
Ranking Based On Selection: 17
United States
Craig Rogers
Urologic Oncology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,283
4,923
0.302
* Total Citation Counts Rankings
Ranking Based On Selection: 18
United States
Iltefat H Hamzavi
Dermatology
Hidradenitis suppurativa
Vitiligo
photodermatology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,028
10,734
0.670
* Total Citation Counts Rankings
Ranking Based On Selection: 19
United States
Albert M Levin
genetic epidemiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,273
5,553
0.389
* Total Citation Counts Rankings
Ranking Based On Selection: 20
United States
Scott Alexander Dulchavsky
telehealth
space
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,134
2,807
0.231
* Total Citation Counts Rankings
Ranking Based On Selection: 21
United States
Kaleem Chaudhry
Public Health
Global Health
Infectious Diseases
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,423
11,380
0.996
* Total Citation Counts Rankings
Ranking Based On Selection: 22
United States
Dhananjay Chitale
breast pathology
lung pathology
molecular pathology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,816
3,287
0.304
* Total Citation Counts Rankings
Ranking Based On Selection: 23
United States
Shailendra Giri
Neuroinflammation
Macrophages biology
metabolism
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,211
3,632
0.356
* Total Citation Counts Rankings
Ranking Based On Selection: 24
United States
Jason Schwalb
Neurosurgery
Neuroscience
Health Policy
Quality Improvement
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,123
3,864
0.382
* Total Citation Counts Rankings
Ranking Based On Selection: 25
United States
Claudio Schuger
Clinical Electrophysiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,840
2,231
0.227
* Total Citation Counts Rankings
Rankings
5,045
United States
2,386
1
Ranking Based On Selection: 1
Thomas Roth
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,791
18,559
0.239
sleep research
sleep medicine
psychopharmaclogy
* Total Citation Counts Rankings
Rankings
9,055
United States
4,317
2
Ranking Based On Selection: 2
Stuart C Gordon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54,202
10,951
0.202
Hepatitis
Liver
Viral hepatitis
* Total Citation Counts Rankings
Rankings
11,177
United States
5,282
3
Ranking Based On Selection: 3
Mani Menon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,301
13,514
0.286
* Total Citation Counts Rankings
Rankings
12,111
United States
5,736
4
Ranking Based On Selection: 4
Steven N Kalkanis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,989
32,975
0.733
* Total Citation Counts Rankings
Rankings
14,811
United States
6,977
5
Ranking Based On Selection: 5
Rivers, E
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,778
8,129
0.204
sepsis
severe sepsis
septic shock
cardiac arrest
shock
* Total Citation Counts Rankings
Rankings
16,359
United States
7,669
6
Ranking Based On Selection: 6
Henry W Lim
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,353
18,312
0.490
* Total Citation Counts Rankings
Rankings
17,165
United States
8,043
7
Ranking Based On Selection: 7
Christine C Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36,210
10,671
0.295
* Total Citation Counts Rankings
Rankings
17,410
United States
8,148
8
Ranking Based On Selection: 8
Jonathan K Ehrman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,902
12,144
0.338
clinical exercise physiology
cardiopulmonary exercise testing
weight management
* Total Citation Counts Rankings
Rankings
27,746
United States
12,660
9
Ranking Based On Selection: 9
Timothy Roehrs
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,506
5,101
0.192
* Total Citation Counts Rankings
Rankings
30,136
United States
13,669
10
Ranking Based On Selection: 10
Laila Marie Poisson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,071
15,560
0.621

360° Institutional Performance & Benchmarking Click Here for Live Demo 

Gain data-driven strategic insights into your institution’s academic performance, global positioning, and competitive strengths through advanced analysis and benchmarking

with 20 similarly ranked institutions at City, Country, Region, and Global levels. 

* Total Citation Counts Rankings
Rankings
33,796
United States
15,176
11
Ranking Based On Selection: 11
Nallasivam Palanisamy|Sivam, PN., Nallasivam, P.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,142
7,132
0.308
Cancer Molecular Cytogenetics
Molecular Pathology and Cancer Genomics
Prostate Cancer
Next
* Total Citation Counts Rankings
Rankings
37,423
United States
16,693
12
Ranking Based On Selection: 12
Benjamin Rybicki
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,530
6,123
0.284
* Total Citation Counts Rankings
Rankings
38,031
United States
16,951
13
Ranking Based On Selection: 13
Howard Crawford
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,293
8,315
0.391
* Total Citation Counts Rankings
Rankings
43,545
United States
19,079
14
Ranking Based On Selection: 14
L Keoki Williams
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,288
9,767
0.506
* Total Citation Counts Rankings
Rankings
46,663
United States
20,304
15
Ranking Based On Selection: 15
Christopher L Drake
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,359
10,016
0.546
sleep disorders
sleep research
insomnia
shift work
sleep reactivity
* Total Citation Counts Rankings
Rankings
50,267
United States
21,744
16
Ranking Based On Selection: 16
Firas Abdollah
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,379
7,493
0.431
Prostate cancer
Bladder cancer
Kidney cancer
* Total Citation Counts Rankings
Rankings
54,896
United States
23,510
17
Ranking Based On Selection: 17
Craig Rogers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,283
4,923
0.302
* Total Citation Counts Rankings
Rankings
56,030
United States
23,934
18
Ranking Based On Selection: 18
Iltefat H Hamzavi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,028
10,734
0.670
Dermatology
Hidradenitis suppurativa
Vitiligo
photodermatology
* Total Citation Counts Rankings
Rankings
65,261
United States
27,439
19
Ranking Based On Selection: 19
Albert M Levin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,273
5,553
0.389
* Total Citation Counts Rankings
Rankings
80,014
United States
32,777
20
Ranking Based On Selection: 20
Scott Alexander Dulchavsky
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,134
2,807
0.231
* Total Citation Counts Rankings
Rankings
86,048
United States
34,953
21
Ranking Based On Selection: 21
Kaleem Chaudhry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,423
11,380
0.996
* Total Citation Counts Rankings
Rankings
91,861
United States
36,991
22
Ranking Based On Selection: 22
Dhananjay Chitale
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,816
3,287
0.304
breast pathology
lung pathology
molecular pathology
* Total Citation Counts Rankings
Rankings
98,191
United States
39,148
23
Ranking Based On Selection: 23
Shailendra Giri
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,211
3,632
0.356
Neuroinflammation
Macrophages biology
metabolism
* Total Citation Counts Rankings
Rankings
99,173
United States
39,497
24
Ranking Based On Selection: 24
Jason Schwalb
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,123
3,864
0.382
Neurosurgery
Neuroscience
Health Policy
Quality Improvement
* Total Citation Counts Rankings
Rankings
102,490
United States
40,681
25
Ranking Based On Selection: 25
Claudio Schuger
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,840
2,231
0.227
Clinical Electrophysiology