Citation Rankings
Highly Cited Researchers

Highly Cited Researchers 1.343 Scientists Citation Rankings - 2025

Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.

* Total Citation Counts Rankings
Ranking Based On Selection: 1
United States
Russel J Reiter
Melatonin
Oxidative Stress
Neuroendocrinolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
222,363
71,571
0.322
* Total Citation Counts Rankings
Ranking Based On Selection: 3
United States
George Perry
Alzheimer Disease
Parkinson Disease
Oxidative Stress
Amyloid
Neuroscienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
130,447
37,113
0.285
* Total Citation Counts Rankings
Ranking Based On Selection: 4
United States
Peter T Fox
neuroscience
connectomics
neuroinformatics
neuroimaging
transcranial magnetic stimulatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
125,845
38,256
0.304
* Total Citation Counts Rankings
Ranking Based On Selection: 5
United States
Antonio Anzueto
pulmonary and cirtical care medicin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
102,277
35,352
0.346
* Total Citation Counts Rankings
Ranking Based On Selection: 6
United States
Dun Xian Tan
melatonin
neurodegenerative disease
oxidative stress
evolutio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,517
26,286
0.339
* Total Citation Counts Rankings
Ranking Based On Selection: 8
United States
Jim Mintz
research methodology in psychiatry/psychology
data analysis
applied biostatistic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,116
13,074
0.214
* Total Citation Counts Rankings
Ranking Based On Selection: 9
United States
Ravi Sandhu
cyber security
access control models architectures
secure cloud and IoT computin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52,403
9,584
0.183

Smart Institutional Plan

Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.

* Total Citation Counts Rankings
Ranking Based On Selection: 10
United States
Robert L Whetten
Discrete Metallurg
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,912
5,796
0.129
* Total Citation Counts Rankings
Ranking Based On Selection: 11
United States
Amaury Nora
Student persistence
structural equation modeling
mentoring
theoretical model of student engagemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,832
12,439
0.284
* Total Citation Counts Rankings
Ranking Based On Selection: 12
United States
Xianlin Han
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,801
19,419
0.443
* Total Citation Counts Rankings
Ranking Based On Selection: 13
United States
Christopher Ellison
sociology of religion
social psychology of health and illness
sociology of family
race and ethnicit
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,980
11,082
0.258
* Total Citation Counts Rankings
Ranking Based On Selection: 14
United States
Hamid Badali *
Clinical Mycology
Azole resitance Aspergillus species
Molecular typin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,602
36,082
0.847
* Total Citation Counts Rankings
Ranking Based On Selection: 15
United States
Kenneth M Hargreaves
pain
neuroscience
endodontic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,221
11,932
0.283
* Total Citation Counts Rankings
Ranking Based On Selection: 16
United States
Peter Houghton
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,756
9,171
0.220
* Total Citation Counts Rankings
Ranking Based On Selection: 17
United States
Patrick Sung
BRCA tumor suppressors
DNA break repair
replication fork repair
homologous recombination
genome maintenanc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,043
11,048
0.276
* Total Citation Counts Rankings
Ranking Based On Selection: 18
United States
Jack L Lancaster
image processing
biomedical engineering
medical physic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,736
9,246
0.233
* Total Citation Counts Rankings
Ranking Based On Selection: 19
United States
Kumar Sharma
Mitochondria
diabetes
kidney diseas
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,572
16,254
0.421
* Total Citation Counts Rankings
Ranking Based On Selection: 20
United States
Michael P Doyle
rhodium(II) catalysis
copper(I) catalysis
diazo chemistry
metal carbenes
heterocyclic chemistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,410
7,362
0.197
* Total Citation Counts Rankings
Ranking Based On Selection: 21
United States
Madesh Muniswamy
Mitochondria
Calcium signaling
ion channels
oxidants
medical science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,575
14,611
0.411
* Total Citation Counts Rankings
Ranking Based On Selection: 22
United States
Georgios Kotsakis
Periodontology
Peri-implantitis
Implantology
Implant Dentistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,601
25,962
0.822
* Total Citation Counts Rankings
Ranking Based On Selection: 23
United States
Stephen E Harris
molecular and cell biolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,145
5,593
0.186
* Total Citation Counts Rankings
Ranking Based On Selection: 24
United States
Kirk S Schanze
Materials Chemistry
Organic Chemistry
Polymer Chemistry
Conjugated Polymers
Photochemistr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,441
7,982
0.271
* Total Citation Counts Rankings
Ranking Based On Selection: 25
United States
Carlos Roberto Jaen
Primary Care
Transformation
Tobacco Contro
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,681
7,877
0.265
* Total Citation Counts Rankings
Rankings
697
United States
274
1
Ranking Based On Selection: 1
Russel J Reiter
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
222,363
71,571
0.322
* Total Citation Counts Rankings
Rankings
1,189
United States
502
2
Ranking Based On Selection: 2
Ralph Defronzo
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
172,692
31,597
0.183
* Total Citation Counts Rankings
Rankings
2,042
United States
925
1
Ranking Based On Selection: 3
George Perry
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
130,447
37,113
0.285
Alzheimer Disease
Parkinson Disease
Oxidative Stress
Amyloid
Neuroscienc
* Total Citation Counts Rankings
Rankings
2,180
United States
1,004
3
Ranking Based On Selection: 4
Peter T Fox
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
125,845
38,256
0.304
neuroscience
connectomics
neuroinformatics
neuroimaging
transcranial magnetic stimulatio
* Total Citation Counts Rankings
Rankings
3,277
United States
1,543
4
Ranking Based On Selection: 5
Antonio Anzueto
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
102,277
35,352
0.346
* Total Citation Counts Rankings
Rankings
5,322
United States
2,507
5
Ranking Based On Selection: 6
Dun Xian Tan
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
77,517
26,286
0.339
melatonin
neurodegenerative disease
oxidative stress
evolutio
* Total Citation Counts Rankings
Rankings
6,112
United States
2,875
6
Ranking Based On Selection: 7
Thomas F Patterson
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
71,593
32,092
0.448
* Total Citation Counts Rankings
Rankings
7,872
United States
3,722
7
Ranking Based On Selection: 8
Jim Mintz
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,116
13,074
0.214
research methodology in psychiatry/psychology
data analysis
applied biostatistic
* Total Citation Counts Rankings
Rankings
10,057
United States
4,749
2
Ranking Based On Selection: 9
Ravi Sandhu
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52,403
9,584
0.183
cyber security
access control models architectures
secure cloud and IoT computin
* Total Citation Counts Rankings
Rankings
12,854
United States
6,035
3
Ranking Based On Selection: 10
Robert L Whetten
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44,912
5,796
0.129

Smart Institutional Plan

Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.

* Total Citation Counts Rankings
Rankings
13,377
United States
6,284
4
Ranking Based On Selection: 11
Amaury Nora
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,832
12,439
0.284
Student persistence
structural equation modeling
mentoring
theoretical model of student engagemen
* Total Citation Counts Rankings
Rankings
13,394
United States
6,291
8
Ranking Based On Selection: 12
Xianlin Han
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
43,801
19,419
0.443
* Total Citation Counts Rankings
Rankings
13,809
United States
6,471
5
Ranking Based On Selection: 13
Christopher Ellison
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,980
11,082
0.258
sociology of religion
social psychology of health and illness
sociology of family
race and ethnicit
* Total Citation Counts Rankings
Rankings
14,012
United States
6,566
9
Ranking Based On Selection: 14
Hamid Badali *
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,602
36,082
0.847
Clinical Mycology
Azole resitance Aspergillus species
Molecular typin
* Total Citation Counts Rankings
Rankings
14,211
United States
6,661
10
Ranking Based On Selection: 15
Kenneth M Hargreaves
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
42,221
11,932
0.283
* Total Citation Counts Rankings
Rankings
14,476
United States
6,762
11
Ranking Based On Selection: 16
Peter Houghton
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
41,756
9,171
0.220
* Total Citation Counts Rankings
Rankings
15,502
United States
7,236
12
Ranking Based On Selection: 17
Patrick Sung
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,043
11,048
0.276
BRCA tumor suppressors
DNA break repair
replication fork repair
homologous recombination
genome maintenanc
* Total Citation Counts Rankings
Rankings
15,678
United States
7,318
13
Ranking Based On Selection: 18
Jack L Lancaster
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,736
9,246
0.233
* Total Citation Counts Rankings
Rankings
16,422
United States
7,668
14
Ranking Based On Selection: 19
Kumar Sharma
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38,572
16,254
0.421
* Total Citation Counts Rankings
Rankings
17,223
United States
8,031
6
Ranking Based On Selection: 20
Michael P Doyle
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,410
7,362
0.197
rhodium(II) catalysis
copper(I) catalysis
diazo chemistry
metal carbenes
heterocyclic chemistr
* Total Citation Counts Rankings
Rankings
18,627
United States
8,624
15
Ranking Based On Selection: 21
Madesh Muniswamy
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,575
14,611
0.411
Mitochondria
Calcium signaling
ion channels
oxidants
medical science
* Total Citation Counts Rankings
Rankings
22,374
United States
10,260
16
Ranking Based On Selection: 22
Georgios Kotsakis
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,601
25,962
0.822
Periodontology
Peri-implantitis
Implantology
Implant Dentistr
* Total Citation Counts Rankings
Rankings
24,086
United States
11,027
17
Ranking Based On Selection: 23
Stephen E Harris
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,145
5,593
0.186
* Total Citation Counts Rankings
Rankings
24,917
United States
11,387
7
Ranking Based On Selection: 24
Kirk S Schanze
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,441
7,982
0.271
Materials Chemistry
Organic Chemistry
Polymer Chemistry
Conjugated Polymers
Photochemistr
* Total Citation Counts Rankings
Rankings
24,653
United States
11,263
18
Ranking Based On Selection: 25
Carlos Roberto Jaen
       Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,681
7,877
0.265