Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Bruce W Hollis
Nutritional Biochemistry
Maternal and Child Health
Pediatric Nutrition
Metrics
H-Index
i10 Index
Citation
140
355
69,764
* Rankings
Ranking Based On Selection :8
Mark T Hamann
Natural Products
Drug Discovery
Pharmacology
Natural Products Synthesis
Metrics
H-Index
i10 Index
Citation
71
200
18,006
* Rankings
Ranking Based On Selection :10
Joseph A Helpern
Magnetic Resonance Imaging
Brain
Neurodegeneration
AD
ADHD
Metrics
H-Index
i10 Index
Citation
67
156
19,795
* Rankings
Ranking Based On Selection :11
Devane Cl
psychiatry
psychopharmacology
drug abuse
pharmacology
pharmacokinetics
Metrics
H-Index
i10 Index
Citation
67
185
14,828
* Rankings
Ranking Based On Selection :12
Stephen Tomlinson
The complement system
inflammation
brain injury
transplant immunology
Metrics
H-Index
i10 Index
Citation
64
167
10,874
* Rankings
Ranking Based On Selection :22
Andrew B Lawson
Bayesian biostatistics
Bayesian disease mapping
spatial epidemiology
environmetrics
Metrics
H-Index
i10 Index
Citation
53
202
13,908
* Rankings
Ranking Based On Selection :24
Mulugeta Gebregziabher
Biostatistics
missing data
longitudinal data
semi-continous data
health services and outcomes research
Metrics
H-Index
i10 Index
Citation
52
147
9,261
* Rankings
Ranking Based On Selection :25
Sophie Paczesny
Immunotherapies
cellular therapies
graft-versus-host-disease
biomarkers
Metrics
H-Index
i10 Index
Citation
52
120
10,206
* Rankings
Ranking Based On Selection :27
Dieter Haemmerich
Thermal ablation
Image-guided therapies
Image-guided Drug Delivery
Bioheat transfer
Mathematical Modeling
Metrics
H-Index
i10 Index
Citation
50
96
8,049
* Rankings
Ranking Based On Selection :28
Carla Kmett Danielson
adolescent traumatic stress
substance use problems
risky sexual behavior
developmental psychopathology
HIV prevention
Metrics
H-Index
i10 Index
Citation
49
110
7,643
* Rankings
Ranking Based On Selection :29
Ezequiel Gleichgerrcht
epilepsy
aphasia
machine learning
connectomics
tractography
Metrics
H-Index
i10 Index
Citation
47
93
7,809
* Rankings
Ranking Based On Selection :31
Aimee L Mcrae Clark
Addiction
Drug Abuse
Sex Differences
Psychopharmacology
Neuropsychopharmacology
Metrics
H-Index
i10 Index
Citation
44
98
6,397
* Rankings
Ranking Based On Selection :34
Harold D May
Microbiology
Microbial Electrochemistry
Bioenergy
Bioremediation
Metrics
H-Index
i10 Index
Citation
43
60
6,329
* Rankings
Ranking Based On Selection :37
Colleen A Hanlon
addiction
brain imaging
brain stimulation
neuromodulation
stroke
Metrics
H-Index
i10 Index
Citation
40
77
4,997
* Rankings
Ranking Based On Selection :40
Azizul Haque
Cancer Immunology and Immunotherapy
autoimmunity
neuroimmunology
Metrics
H-Index
i10 Index
Citation
39
83
4,010
* Rankings
Ranking Based On Selection :41
David J Taber
Transplantation
Medication Safety
Quality Outcomes
Healthcare Value
Metrics
H-Index
i10 Index
Citation
37
109
4,291
* Rankings
Ranking Based On Selection :43
Kristine Deleon Pennell
periodontal disease
myocardial infarction
inflammation
fibrosis
immunology
Metrics
H-Index
i10 Index
Citation
35
51
4,287
* Rankings
Ranking Based On Selection :46
Erin A Mcclure
Smoking cessation
clinical trials
mobile health technology
Metrics
H-Index
i10 Index
Citation
34
72
3,260
* Rankings
Ranking Based On Selection :53
Ali Tabesh
Signal and image processing
image analysis
computer-aided diagnosis
magnetic resonance imaging
microscopy
Metrics
H-Index
i10 Index
Citation
31
42
4,316
* Rankings
Ranking Based On Selection :54
James J Prisciandaro
bipolar disorder
substance use disorder
proton magnetic resonance spectroscopy
functional magnetic resonance imaging
Metrics
H-Index
i10 Index
Citation
30
47
2,695
* Rankings
Ranking Based On Selection :61
Bashar W Badran
Neuroscience
Brain Stimulation
Neural Engineering
Vagus Nerve Stimulation
TMS
Metrics
H-Index
i10 Index
Citation
28
48
3,088
* Rankings
Ranking Based On Selection :68
Evert Eriksson
General Surgery
Abdominal Wall Reconstruction
Sternal and Rib Fractures
Flail Chest
Surgical Rib Fixation
Metrics
H-Index
i10 Index
Citation
25
38
2,342
Juan C Camacho
Interventional Radiology - Oncology - Locoregional Therapies - Magnetic Resonance Imaging
Metrics
H-Index
i10 Index
Citation
22
27
1,213
Harris Slone
Orthopaedic Surgery
Sports Medicine
Arthroscopy
Arthroscopic Surgery
Metrics
H-Index
i10 Index
Citation
20
35
1,655
Jeremy Burt
cardiovascular imaging
lung cancer
deep learning
FFRct
Metrics
H-Index
i10 Index
Citation
20
34
1,971
Peng Cheng Han
Neuropathology
neurodegenerative disease
epilepsy
neurodevelopment
CNS tumor
Metrics
H-Index
i10 Index
Citation
19
21
1,404
John L Pearce
air quality
environmental health
geographic information science
environmental informatics
Metrics
H-Index
i10 Index
Citation
18
23
1,362
Robert Cina
Surgical Quality and Value
Healthcare administration
Cost effectiveness
Metrics
H-Index
i10 Index
Citation
17
25
1,152
* Rankings
Ranking Based On Selection :100
Rasesh Parikh
Biochemistry
Genetics
Epigenetics
Developmental Biology
Molecular Biology
Metrics
H-Index
i10 Index
Citation
16
18
5,014
Rankings
Ranking Based On Selection: 1
Bruce W Hollis
Metrics
H-Index
i10 Index
Citation Counts
140
355
69,764
Nutritional Biochemistry
Maternal and Child Health
Pediatric Nutrition
Rankings
Ranking Based On Selection: 2
Kathleen T Brady
Metrics
H-Index
i10 Index
Citation Counts
109
398
45,123
Rankings
Ranking Based On Selection: 3
K Michael Cummings
Metrics
H-Index
i10 Index
Citation Counts
108
513
45,951
Rankings
Ranking Based On Selection: 4
Bruce Ovbiagele
Metrics
H-Index
i10 Index
Citation Counts
99
440
142,478
Rankings
Ranking Based On Selection: 5
U Joseph Schoepf
Metrics
H-Index
i10 Index
Citation Counts
96
557
41,316
Rankings
Ranking Based On Selection: 6
Kenneth D Tew
Metrics
H-Index
i10 Index
Citation Counts
85
242
37,569
Rankings
Ranking Based On Selection: 7
Mark Kindy
Metrics
H-Index
i10 Index
Citation Counts
74
188
20,980
Rankings
Ranking Based On Selection: 8
Mark T Hamann
Metrics
H-Index
i10 Index
Citation Counts
71
200
18,006
Natural Products
Drug Discovery
Pharmacology
Natural Products Synthesis
Rankings
Ranking Based On Selection: 9
Leonardo Bonilha
Metrics
H-Index
i10 Index
Citation Counts
70
215
18,189
Neurology
Aphasia
Language Disorders
Epilepsy
Rankings
Ranking Based On Selection: 10
Joseph A Helpern
Metrics
H-Index
i10 Index
Citation Counts
67
156
19,795
Magnetic Resonance Imaging
Brain
Neurodegeneration
AD
ADHD
Rankings
Ranking Based On Selection: 11
Devane Cl
Metrics
H-Index
i10 Index
Citation Counts
67
185
14,828
psychiatry
psychopharmacology
drug abuse
pharmacology
pharmacokinetics
Rankings
Ranking Based On Selection: 12
Stephen Tomlinson
Metrics
H-Index
i10 Index
Citation Counts
64
167
10,874
The complement system
inflammation
brain injury
transplant immunology
Rankings
Ranking Based On Selection: 13
Kumar Sambamurti
Metrics
H-Index
i10 Index
Citation Counts
63
105
15,929
Rankings
Ranking Based On Selection: 14
Bradley A Schulte
Metrics
H-Index
i10 Index
Citation Counts
63
191
12,604
Rankings
Ranking Based On Selection: 15
Jacqueline Mcginty
Metrics
H-Index
i10 Index
Citation Counts
61
158
11,996
Rankings
Ranking Based On Selection: 16
Federica Del Monte
Metrics
H-Index
i10 Index
Citation Counts
60
102
14,469
Rankings
Ranking Based On Selection: 17
Shaun A Nguyen
Metrics
H-Index
i10 Index
Citation Counts
59
205
10,652
Rankings
Ranking Based On Selection: 18
Quill Turk
Metrics
H-Index
i10 Index
Citation Counts
58
129
10,650
Rankings
Ranking Based On Selection: 19
Timothy D Brewerton
Metrics
H-Index
i10 Index
Citation Counts
56
132
13,921
Eating disorders
trauma
PTSD
psychopharmacology
Rankings
Ranking Based On Selection: 20
Alex Spiotta
Metrics
H-Index
i10 Index
Citation Counts
55
182
11,521
Rankings
Ranking Based On Selection: 21
Patrick Woster
Metrics
H-Index
i10 Index
Citation Counts
55
121
12,203
Rankings
Ranking Based On Selection: 22
Andrew B Lawson
Metrics
H-Index
i10 Index
Citation Counts
53
202
13,908
Bayesian biostatistics
Bayesian disease mapping
spatial epidemiology
environmetrics
Rankings
Ranking Based On Selection: 23
L Judson Chandler
Metrics
H-Index
i10 Index
Citation Counts
53
96
8,431
Rankings
Ranking Based On Selection: 24
Mulugeta Gebregziabher
Metrics
H-Index
i10 Index
Citation Counts
52
147
9,261
Biostatistics
missing data
longitudinal data
semi-continous data
health services and outcomes research
Rankings
Ranking Based On Selection: 25
Sophie Paczesny
Metrics
H-Index
i10 Index
Citation Counts
52
120
10,206
Immunotherapies
cellular therapies
graft-versus-host-disease
biomarkers
Rankings
Ranking Based On Selection: 26
Philip Howe
Metrics
H-Index
i10 Index
Citation Counts
52
95
8,992
Rankings
Ranking Based On Selection: 27
Dieter Haemmerich
Metrics
H-Index
i10 Index
Citation Counts
50
96
8,049
Thermal ablation
Image-guided therapies
Image-guided Drug Delivery
Bioheat transfer
Mathematical Modeling
Rankings
Ranking Based On Selection: 28
Carla Kmett Danielson
Metrics
H-Index
i10 Index
Citation Counts
49
110
7,643
adolescent traumatic stress
substance use problems
risky sexual behavior
developmental psychopathology
HIV prevention
Rankings
Ranking Based On Selection: 29
Ezequiel Gleichgerrcht
Metrics
H-Index
i10 Index
Citation Counts
47
93
7,809
epilepsy
aphasia
machine learning
connectomics
tractography
Rankings
Ranking Based On Selection: 30
Mushfiquddin Khan
Metrics
H-Index
i10 Index
Citation Counts
47
133
9,396
Rankings
Ranking Based On Selection: 31
Aimee L Mcrae Clark
Metrics
H-Index
i10 Index
Citation Counts
44
98
6,397
Addiction
Drug Abuse
Sex Differences
Psychopharmacology
Neuropsychopharmacology
Rankings
Ranking Based On Selection: 32
Jordan Elm
Metrics
H-Index
i10 Index
Citation Counts
43
79
7,771
Rankings
Ranking Based On Selection: 33
Heather L Evans
Metrics
H-Index
i10 Index
Citation Counts
43
93
6,643
Rankings
Ranking Based On Selection: 34
Harold D May
Metrics
H-Index
i10 Index
Citation Counts
43
60
6,329
Microbiology
Microbial Electrochemistry
Bioenergy
Bioremediation
Rankings
Ranking Based On Selection: 35
Ken Catchpole
Metrics
H-Index
i10 Index
Citation Counts
42
101
7,952
Rankings
Ranking Based On Selection: 36
James G Ravenel
Metrics
H-Index
i10 Index
Citation Counts
41
88
6,882
Rankings
Ranking Based On Selection: 37
Colleen A Hanlon
Metrics
H-Index
i10 Index
Citation Counts
40
77
4,997
addiction
brain imaging
brain stimulation
neuromodulation
stroke
Rankings
Ranking Based On Selection: 38
Nathaniel Baker
Metrics
H-Index
i10 Index
Citation Counts
40
92
4,608
Rankings
Ranking Based On Selection: 39
Michael E Smith
Metrics
H-Index
i10 Index
Citation Counts
39
117
8,171
Rankings
Ranking Based On Selection: 40
Azizul Haque
Metrics
H-Index
i10 Index
Citation Counts
39
83
4,010
Cancer Immunology and Immunotherapy
autoimmunity
neuroimmunology
Rankings
Ranking Based On Selection: 41
David J Taber
Metrics
H-Index
i10 Index
Citation Counts
37
109
4,291
Transplantation
Medication Safety
Quality Outcomes
Healthcare Value
Rankings
Ranking Based On Selection: 42
Zoran Rumboldt
Metrics
H-Index
i10 Index
Citation Counts
37
81
7,583
Rankings
Ranking Based On Selection: 43
Kristine Deleon Pennell
Metrics
H-Index
i10 Index
Citation Counts
35
51
4,287
periodontal disease
myocardial infarction
inflammation
fibrosis
immunology
Rankings
Ranking Based On Selection: 44
Jonathan J Halford
Metrics
H-Index
i10 Index
Citation Counts
34
60
4,102
EEG
neurophysiology
epilepsy
DICOM
clinical trials
Rankings
Ranking Based On Selection: 45
C James Chou
Metrics
H-Index
i10 Index
Citation Counts
34
58
3,497
Rankings
Ranking Based On Selection: 46
Erin A Mcclure
Metrics
H-Index
i10 Index
Citation Counts
34
72
3,260
Smoking cessation
clinical trials
mobile health technology
Rankings
Ranking Based On Selection: 47
Yuri Karl Peterson
Metrics
H-Index
i10 Index
Citation Counts
34
49
4,776
Pharmacology
GPCRs
drug discovery
cheminformatics
mitochondria
Rankings
Ranking Based On Selection: 48
Jane Joseph
Metrics
H-Index
i10 Index
Citation Counts
34
68
4,112
Rankings
Ranking Based On Selection: 49
Evan Graboyes
Metrics
H-Index
i10 Index
Citation Counts
33
75
3,290
Rankings
Ranking Based On Selection: 50
Roger Johnson
Metrics
H-Index
i10 Index
Citation Counts
33
55
3,718
Rankings
Ranking Based On Selection: 51
Lynne Nemeth
Metrics
H-Index
i10 Index
Citation Counts
32
76
3,229
Rankings
Ranking Based On Selection: 52
Christopher E Gross
Metrics
H-Index
i10 Index
Citation Counts
31
57
2,777
Rankings
Ranking Based On Selection: 53
Ali Tabesh
Metrics
H-Index
i10 Index
Citation Counts
31
42
4,316
Signal and image processing
image analysis
computer-aided diagnosis
magnetic resonance imaging
microscopy
Rankings
Ranking Based On Selection: 54
James J Prisciandaro
Metrics
H-Index
i10 Index
Citation Counts
30
47
2,695
bipolar disorder
substance use disorder
proton magnetic resonance spectroscopy
functional magnetic resonance imaging
Rankings
Ranking Based On Selection: 56
Tibor Fulop|Fülöp, Tibor
Metrics
H-Index
i10 Index
Citation Counts
29
78
4,842
Rankings
Ranking Based On Selection: 57
David Bundy
Metrics
H-Index
i10 Index
Citation Counts
29
57
3,581
Rankings
Ranking Based On Selection: 59
Maria Vittoria Spampinato
Metrics
H-Index
i10 Index
Citation Counts
29
50
3,232
Rankings
Ranking Based On Selection: 60
Kristin Wallace
Metrics
H-Index
i10 Index
Citation Counts
29
46
2,937
Rankings
Ranking Based On Selection: 61
Bashar W Badran
Metrics
H-Index
i10 Index
Citation Counts
28
48
3,088
Neuroscience
Brain Stimulation
Neural Engineering
Vagus Nerve Stimulation
TMS
Rankings
Ranking Based On Selection: 62
Jie Zhang
Metrics
H-Index
i10 Index
Citation Counts
28
46
2,696
Rankings
Ranking Based On Selection: 63
Allison Ross Eckard
Metrics
H-Index
i10 Index
Citation Counts
28
50
2,701
Rankings
Ranking Based On Selection: 64
Elaine J Amella
Metrics
H-Index
i10 Index
Citation Counts
28
47
2,657
aging
nutrition
dementia
caregiving
Alzheimer's disease
Rankings
Ranking Based On Selection: 65
Tammy L Loucks
Metrics
H-Index
i10 Index
Citation Counts
27
39
4,020
Rankings
Ranking Based On Selection: 66
Michael Scofield
Metrics
H-Index
i10 Index
Citation Counts
26
47
3,325
Rankings
Ranking Based On Selection: 67
Christine Holmstedt
Metrics
H-Index
i10 Index
Citation Counts
25
39
9,821
Rankings
Ranking Based On Selection: 68
Evert Eriksson
Metrics
H-Index
i10 Index
Citation Counts
25
38
2,342
General Surgery
Abdominal Wall Reconstruction
Sternal and Rib Fractures
Flail Chest
Surgical Rib Fixation
Rankings
Ranking Based On Selection: 69
Satish N Nadig
Metrics
H-Index
i10 Index
Citation Counts
25
45
2,411
Rankings
Ranking Based On Selection: 70
Eric Matheson
Metrics
H-Index
i10 Index
Citation Counts
23
28
3,201
Rankings
Ranking Based On Selection: 71
Naohiro Yamaguchi
Metrics
H-Index
i10 Index
Citation Counts
23
37
2,191
Biochemistry
Biophysics
Cell Biology
Physiology
Rankings
Ranking Based On Selection: 72
Paramita Chakraborty
Metrics
H-Index
i10 Index
Citation Counts
23
31
1,378
Rankings
Ranking Based On Selection: 73
Mark S Sothmann
Metrics
H-Index
i10 Index
Citation Counts
23
31
2,777
Rankings
Ranking Based On Selection: 74
Juan C Camacho
Metrics
H-Index
i10 Index
Citation Counts
22
27
1,213
Interventional Radiology - Oncology - Locoregional Therapies - Magnetic Resonance Imaging
Rankings
Ranking Based On Selection: 75
William Bill Basco
Metrics
H-Index
i10 Index
Citation Counts
22
45
1,755
Rankings
Ranking Based On Selection: 76
Taylor M Duguay
Metrics
H-Index
i10 Index
Citation Counts
21
32
1,807
Rankings
Ranking Based On Selection: 77
James M Otis
Metrics
H-Index
i10 Index
Citation Counts
21
25
2,628
Rankings
Ranking Based On Selection: 78
Natalia Oleinik
Metrics
H-Index
i10 Index
Citation Counts
21
24
1,728
Rankings
Ranking Based On Selection: 79
Joseph J Sistino
Metrics
H-Index
i10 Index
Citation Counts
21
39
1,354
Cardiopulmonary Bypass
Outcomes Following Cardiac Surgery
Rankings
Ranking Based On Selection: 80
Harris Slone
Metrics
H-Index
i10 Index
Citation Counts
20
35
1,655
Orthopaedic Surgery
Sports Medicine
Arthroscopy
Arthroscopic Surgery
Rankings
Ranking Based On Selection: 81
Jeremy Burt
Metrics
H-Index
i10 Index
Citation Counts
20
34
1,971
cardiovascular imaging
lung cancer
deep learning
FFRct
Rankings
Ranking Based On Selection: 83
Jessica H Hartman
Metrics
H-Index
i10 Index
Citation Counts
20
30
1,145
Rankings
Ranking Based On Selection: 85
Thomas Curran
Metrics
H-Index
i10 Index
Citation Counts
20
31
2,035
Rankings
Ranking Based On Selection: 86
James Zoller
Metrics
H-Index
i10 Index
Citation Counts
20
28
1,775
Rankings
Ranking Based On Selection: 87
G Aaron Hobbs *
Metrics
H-Index
i10 Index
Citation Counts
19
23
16,717
Rankings
Ranking Based On Selection: 88
Jennifer A Rinker
Metrics
H-Index
i10 Index
Citation Counts
19
24
1,240
Rankings
Ranking Based On Selection: 89
Peng Cheng Han
Metrics
H-Index
i10 Index
Citation Counts
19
21
1,404
Neuropathology
neurodegenerative disease
epilepsy
neurodevelopment
CNS tumor
Rankings
Ranking Based On Selection: 90
Silvia Guglietta
Metrics
H-Index
i10 Index
Citation Counts
19
20
3,311
Rankings
Ranking Based On Selection: 91
Saeed Elojeimy
Metrics
H-Index
i10 Index
Citation Counts
19
27
1,980
Rankings
Ranking Based On Selection: 92
Constanza Garcia Keller
Metrics
H-Index
i10 Index
Citation Counts
18
24
1,053
Rankings
Ranking Based On Selection: 93
Federico Rodriguez Porcel
Metrics
H-Index
i10 Index
Citation Counts
18
25
1,243
Rankings
Ranking Based On Selection: 94
John L Pearce
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,362
air quality
environmental health
geographic information science
environmental informatics
Rankings
Ranking Based On Selection: 95
Kareem Sioufi
Metrics
H-Index
i10 Index
Citation Counts
17
23
1,201
Rankings
Ranking Based On Selection: 96
Mohammed Sofi
Metrics
H-Index
i10 Index
Citation Counts
17
22
1,008
Rankings
Ranking Based On Selection: 97
Tekin Baglam
Metrics
H-Index
i10 Index
Citation Counts
17
28
931
Otolaryngology Head Neck Surgery Pediatric Otolaryngology
Rankings
Ranking Based On Selection: 98
Robert Cina
Metrics
H-Index
i10 Index
Citation Counts
17
25
1,152
Surgical Quality and Value
Healthcare administration
Cost effectiveness
Rankings
Ranking Based On Selection: 99
Cynthia Welsh
Metrics
H-Index
i10 Index
Citation Counts
17
23
1,871
Rankings
Ranking Based On Selection: 100
Rasesh Parikh
Metrics
H-Index
i10 Index
Citation Counts
16
18
5,014
Biochemistry
Genetics
Epigenetics
Developmental Biology
Molecular Biology