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" (873,937 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 :2
Ali H Hajeer
Transplant Immunology
genetics of complex diseases
diagnostics immunology
autoimmunity
Metrics
H-Index
i10 Index
Citation
64
149
14,107
* Rankings
Ranking Based On Selection :3
Hanan Balkhy
Infectious Diseases
Infection Control
Antibiotics
Resistance
Pediatrics
Metrics
H-Index
i10 Index
Citation
62
149
17,860
* Rankings
Ranking Based On Selection :4
Al Jahdali Hamdan
Sleep
TB
Asthma
COPD
Interstitial pulmonary disease pulmonary
Metrics
H-Index
i10 Index
Citation
44
121
7,319
* Rankings
Ranking Based On Selection :13
Rabih O Al Kaysi
Photomechanical Crystals
Organic Chemistry
Nanomaterials
Drug delivery
Organic Synthesis
Metrics
H-Index
i10 Index
Citation
34
55
4,096
* Rankings
Ranking Based On Selection :16
Ayman M Saleh
Signal Transduction
Synthetic anticancer drugs
apoptosis
Cell cycle regulation
natural anticancer drug
Metrics
H-Index
i10 Index
Citation
31
56
8,272
* Rankings
Ranking Based On Selection :21
Khalid M Abu Salah
nano-diagnostics
nanomedicine
nano-biosensors
drug nano-carriers
koetjapic acid
Metrics
H-Index
i10 Index
Citation
28
46
2,980
* Rankings
Ranking Based On Selection :27
Khaled Al Surimi
Health Services Research
Quality and Safety
Health systems
Public Health
Healthcare Management
Metrics
H-Index
i10 Index
Citation
25
46
1,928
* Rankings
Ranking Based On Selection :31
Syed Sameer
Cancer Genetics
Colorectal Cancer
Genetic Polymorphisms
Oncology
Medical Education
Metrics
H-Index
i10 Index
Citation
25
59
3,368
* Rankings
Ranking Based On Selection :34
Syed Faisal Zaidi
Helicobacter pylori
Gastric Cancer
Colon Cancer
Medicinal Plants
Epidemiology
Metrics
H-Index
i10 Index
Citation
24
34
1,998
* Rankings
Ranking Based On Selection :41
Rajkumar Rajendram
Internal Medicine
Anaesthesia
Intensive Care
Peri-operative medicine
Nutrition
Metrics
H-Index
i10 Index
Citation
22
45
4,298
* Rankings
Ranking Based On Selection :46
Kheireddine El Boubbou
Organic Chemistry
Nanoscience
Nanomedicine
Biomaterials
Functional Nanomaterials
Metrics
H-Index
i10 Index
Citation
21
26
2,514
* Rankings
Ranking Based On Selection :47
Alaa Eldeen Bakry Yassin
Drug Delivery
polymeric Nanoparticles
Solid lipid nanoparticles
colon drug delivery
gastroretentive drug delivery
Metrics
H-Index
i10 Index
Citation
21
33
1,471
* Rankings
Ranking Based On Selection :55
Mamoon Rashid
Next Generation Sequence Analysis
Genomics
Multi-omics data analyses
Machine Learning Techniques
Metrics
H-Index
i10 Index
Citation
20
22
5,753
* Rankings
Ranking Based On Selection :59
Amre Nasr
Immunology and Microbiology
Genetics and Molecular Biology
malaria
Metrics
H-Index
i10 Index
Citation
19
31
1,029
* Rankings
Ranking Based On Selection :61
Talat Mesud Yelbuz
Clinical Pediatric Cardiology: Imaging
Basic Cardiovascular Research: Cardiac development & Imaging
Metrics
H-Index
i10 Index
Citation
19
29
1,807
* Rankings
Ranking Based On Selection :66
Hifzur Rahman Ansari
Support Vector Machines (Artificial Intelligence)
Immuno informatics (epitopes/databases)
Next
Metrics
H-Index
i10 Index
Citation
18
22
2,160
* Rankings
Ranking Based On Selection :67
Sameer Mohammad
Insulin resistance and Type 2 Diabetes
GPCRs
translational control of adipose biology
Metrics
H-Index
i10 Index
Citation
18
20
1,388
* Rankings
Ranking Based On Selection :70
Zafar Iqbal il Pdr
Leukemia stem cells
Molecular Pathology
Medical Genomics
Cancer Biology
Biomedicine
Metrics
H-Index
i10 Index
Citation
18
30
929
* Rankings
Ranking Based On Selection :77
Khansa Ababneh
Periodontics
Genetics of periodontal diseases
Association between periodontal condition and nutritional deficiencies
Aggressive periodontitis
Metrics
H-Index
i10 Index
Citation
17
17
1,432
* Rankings
Ranking Based On Selection :78
Mustafa Al Zoughool
environmental exposure assessment
population health
toxicology
Metrics
H-Index
i10 Index
Citation
17
28
1,451
* Rankings
Ranking Based On Selection :82
Feras Alshomer
Plastic Surgery
Microsurgery Supermicrosurgery
lymphedema reconstruction
Tissue engineering
3D printing
Metrics
H-Index
i10 Index
Citation
16
18
716
* Rankings
Ranking Based On Selection :84
Mohammed Hamad
DNA integrity
Oxidative Stress
Molecular Biology
Drug-Drug Interaction
Metrics
H-Index
i10 Index
Citation
16
20
1,033
* Rankings
Ranking Based On Selection :97
Bakheet Aldosari
Electronic Health Records
Public and Population Health Informatics
Consumer Health Informatics
Metrics
H-Index
i10 Index
Citation
15
21
871
* Rankings
Ranking Based On Selection :98
Raju Suresh Kumar
Medical Physiology
Neuroscience
Medical Education
Cardio-Respiratory Physiology
Metrics
H-Index
i10 Index
Citation
15
17
929
Rankings
Ranking Based On Selection: 1
Motasim Badri
Metrics
H-Index
i10 Index
Citation Counts
112
388
66,609
Rankings
Ranking Based On Selection: 2
Ali H Hajeer
Metrics
H-Index
i10 Index
Citation Counts
64
149
14,107
Transplant Immunology
genetics of complex diseases
diagnostics immunology
autoimmunity
Rankings
Ranking Based On Selection: 3
Hanan Balkhy
Metrics
H-Index
i10 Index
Citation Counts
62
149
17,860
Infectious Diseases
Infection Control
Antibiotics
Resistance
Pediatrics
Rankings
Ranking Based On Selection: 4
Al Jahdali Hamdan
Metrics
H-Index
i10 Index
Citation Counts
44
121
7,319
Sleep
TB
Asthma
COPD
Interstitial pulmonary disease pulmonary
Rankings
Ranking Based On Selection: 5
Abderrezak Bouchama
Metrics
H-Index
i10 Index
Citation Counts
44
66
11,619
Critical care medicine
heat stroke
sepsis
immune response
stress response
Rankings
Ranking Based On Selection: 6
Majid Alfadhel
Metrics
H-Index
i10 Index
Citation Counts
42
143
7,334
Rankings
Ranking Based On Selection: 7
Epidemiology
Pain research
Clinical Epidemiology
Meta-analysis
Systematic reviews
Rankings
Ranking Based On Selection: 9
Abdulla Al Khader Al Sayyari
Metrics
H-Index
i10 Index
Citation Counts
38
122
4,977
Nephrolgy
Renal Transplantation Medical Ethics
Rankings
Ranking Based On Selection: 10
Shoeb Qureshi
Metrics
H-Index
i10 Index
Citation Counts
37
93
4,336
Rankings
Ranking Based On Selection: 11
Abdul Rahman Jazieh
Metrics
H-Index
i10 Index
Citation Counts
35
90
4,186
Rankings
Ranking Based On Selection: 12
Hasan M Al Dorzi
Metrics
H-Index
i10 Index
Citation Counts
34
77
4,650
Critical care
Respiratory diseases
Clinical research
Rankings
Ranking Based On Selection: 13
Rabih O Al Kaysi
Metrics
H-Index
i10 Index
Citation Counts
34
55
4,096
Photomechanical Crystals
Organic Chemistry
Nanomaterials
Drug delivery
Organic Synthesis
Rankings
Ranking Based On Selection: 15
Mohammed Al Balwi
Metrics
H-Index
i10 Index
Citation Counts
31
60
4,490
Rankings
Ranking Based On Selection: 16
Ayman M Saleh
Metrics
H-Index
i10 Index
Citation Counts
31
56
8,272
Signal Transduction
Synthetic anticancer drugs
apoptosis
Cell cycle regulation
natural anticancer drug
Rankings
Ranking Based On Selection: 17
Abdullah Alshimemeri
Metrics
H-Index
i10 Index
Citation Counts
31
50
3,644
Rankings
Ranking Based On Selection: 18
Yousef Saleh
Metrics
H-Index
i10 Index
Citation Counts
29
49
2,542
Rankings
Ranking Based On Selection: 19
Abdulhakim B Jamjoom
Metrics
H-Index
i10 Index
Citation Counts
29
59
2,164
Rankings
Ranking Based On Selection: 20
Fahad Al Hameed
Metrics
H-Index
i10 Index
Citation Counts
28
47
5,709
Rankings
Ranking Based On Selection: 21
Khalid M Abu Salah
Metrics
H-Index
i10 Index
Citation Counts
28
46
2,980
nano-diagnostics
nanomedicine
nano-biosensors
drug nano-carriers
koetjapic acid
Rankings
Ranking Based On Selection: 22
Imadul Islam
Metrics
H-Index
i10 Index
Citation Counts
28
43
2,569
Drug Development
Medicinal Chemistry
Drug Design
Antibody Drug Conjugates
Rankings
Ranking Based On Selection: 23
Saeed Al Turki
Metrics
H-Index
i10 Index
Citation Counts
26
31
8,318
Rankings
Ranking Based On Selection: 24
Hanan Al Kadri
Metrics
H-Index
i10 Index
Citation Counts
26
37
2,173
Rankings
Ranking Based On Selection: 25
Adult Hematlogy & Stem Cell Transplantation
Rankings
Ranking Based On Selection: 27
Khaled Al Surimi
Metrics
H-Index
i10 Index
Citation Counts
25
46
1,928
Health Services Research
Quality and Safety
Health systems
Public Health
Healthcare Management
Rankings
Ranking Based On Selection: 28
Algahtani Hussein
Metrics
H-Index
i10 Index
Citation Counts
25
54
2,399
Rankings
Ranking Based On Selection: 29
Fayssal Farahat
Metrics
H-Index
i10 Index
Citation Counts
25
50
2,643
Rankings
Ranking Based On Selection: 31
Syed Sameer
Metrics
H-Index
i10 Index
Citation Counts
25
59
3,368
Cancer Genetics
Colorectal Cancer
Genetic Polymorphisms
Oncology
Medical Education
Rankings
Ranking Based On Selection: 32
Adel F Almutairi
Metrics
H-Index
i10 Index
Citation Counts
24
36
2,474
Rankings
Ranking Based On Selection: 33
Mohamed Abumaree
Metrics
H-Index
i10 Index
Citation Counts
24
39
2,550
Stem Cells
Regenerative Medicine
Reproductive Medicine
Rankings
Ranking Based On Selection: 34
Syed Faisal Zaidi
Metrics
H-Index
i10 Index
Citation Counts
24
34
1,998
Helicobacter pylori
Gastric Cancer
Colon Cancer
Medicinal Plants
Epidemiology
Rankings
Ranking Based On Selection: 35
Kanwal Ahmed
Metrics
H-Index
i10 Index
Citation Counts
24
34
1,568
Rankings
Ranking Based On Selection: 36
Bader Shirah
Metrics
H-Index
i10 Index
Citation Counts
23
48
1,920
Rankings
Ranking Based On Selection: 37
Suliman Alghnam
Metrics
H-Index
i10 Index
Citation Counts
23
46
3,692
Rankings
Ranking Based On Selection: 38
Emad Masuadi
Metrics
H-Index
i10 Index
Citation Counts
22
52
2,633
Rankings
Ranking Based On Selection: 39
Abdulrahman Alswaid
Metrics
H-Index
i10 Index
Citation Counts
22
31
3,091
Rankings
Ranking Based On Selection: 41
Rajkumar Rajendram
Metrics
H-Index
i10 Index
Citation Counts
22
45
4,298
Internal Medicine
Anaesthesia
Intensive Care
Peri-operative medicine
Nutrition
Rankings
Ranking Based On Selection: 42
Aamir Omair
Metrics
H-Index
i10 Index
Citation Counts
22
46
2,464
Rankings
Ranking Based On Selection: 43
Ahmad M Deeb
Metrics
H-Index
i10 Index
Citation Counts
21
30
5,359
Rankings
Ranking Based On Selection: 45
Abdulkareem Albekairy
Metrics
H-Index
i10 Index
Citation Counts
21
35
2,184
Rankings
Ranking Based On Selection: 46
Kheireddine El Boubbou
Metrics
H-Index
i10 Index
Citation Counts
21
26
2,514
Organic Chemistry
Nanoscience
Nanomedicine
Biomaterials
Functional Nanomaterials
Rankings
Ranking Based On Selection: 47
Alaa Eldeen Bakry Yassin
Metrics
H-Index
i10 Index
Citation Counts
21
33
1,471
Drug Delivery
polymeric Nanoparticles
Solid lipid nanoparticles
colon drug delivery
gastroretentive drug delivery
Rankings
Ranking Based On Selection: 48
Abdulaziz Aldawood
Metrics
H-Index
i10 Index
Citation Counts
21
29
3,890
Rankings
Ranking Based On Selection: 49
Bandar Al Knawy
Metrics
H-Index
i10 Index
Citation Counts
21
27
1,600
Rankings
Ranking Based On Selection: 51
Naif Khalaf Alharbi
Metrics
H-Index
i10 Index
Citation Counts
20
36
1,900
Virology
Vaccinology
pandemic preparedness
MERS-CoV
COVID-19
Rankings
Ranking Based On Selection: 54
Aslam Khan
Metrics
H-Index
i10 Index
Citation Counts
20
29
1,485
Rankings
Ranking Based On Selection: 55
Mamoon Rashid
Metrics
H-Index
i10 Index
Citation Counts
20
22
5,753
Next Generation Sequence Analysis
Genomics
Multi-omics data analyses
Machine Learning Techniques
Rankings
Ranking Based On Selection: 56
Mahmoud Mansour
Metrics
H-Index
i10 Index
Citation Counts
20
26
2,941
Rankings
Ranking Based On Selection: 58
Adnan Al Shaikh
Metrics
H-Index
i10 Index
Citation Counts
19
29
1,229
Rankings
Ranking Based On Selection: 59
Amre Nasr
Metrics
H-Index
i10 Index
Citation Counts
19
31
1,029
Immunology and Microbiology
Genetics and Molecular Biology
malaria
Rankings
Ranking Based On Selection: 61
Talat Mesud Yelbuz
Metrics
H-Index
i10 Index
Citation Counts
19
29
1,807
Clinical Pediatric Cardiology: Imaging
Basic Cardiovascular Research: Cardiac development & Imaging
Rankings
Ranking Based On Selection: 64
Salam Massadeh
Metrics
H-Index
i10 Index
Citation Counts
18
31
1,220
Rankings
Ranking Based On Selection: 65
Abdullah Alharbi
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,195
Rankings
Ranking Based On Selection: 66
Hifzur Rahman Ansari
Metrics
H-Index
i10 Index
Citation Counts
18
22
2,160
Support Vector Machines (Artificial Intelligence)
Immuno informatics (epitopes/databases)
Next
Rankings
Ranking Based On Selection: 67
Sameer Mohammad
Metrics
H-Index
i10 Index
Citation Counts
18
20
1,388
Insulin resistance and Type 2 Diabetes
GPCRs
translational control of adipose biology
Rankings
Ranking Based On Selection: 68
Saad Al Qahtani
Metrics
H-Index
i10 Index
Citation Counts
18
27
1,844
Rankings
Ranking Based On Selection: 69
Alaa Alshareeda
Metrics
H-Index
i10 Index
Citation Counts
18
21
865
Rankings
Ranking Based On Selection: 70
Zafar Iqbal il Pdr
Metrics
H-Index
i10 Index
Citation Counts
18
30
929
Leukemia stem cells
Molecular Pathology
Medical Genomics
Cancer Biology
Biomedicine
Rankings
Ranking Based On Selection: 73
Majed Halwani
Metrics
H-Index
i10 Index
Citation Counts
17
20
1,470
Rankings
Ranking Based On Selection: 75
Mohamed Salim Kabbani
Metrics
H-Index
i10 Index
Citation Counts
17
33
897
Rankings
Ranking Based On Selection: 76
Tanvir Khatlani
Metrics
H-Index
i10 Index
Citation Counts
17
23
1,067
Rankings
Ranking Based On Selection: 77
Khansa Ababneh
Metrics
H-Index
i10 Index
Citation Counts
17
17
1,432
Periodontics
Genetics of periodontal diseases
Association between periodontal condition and nutritional deficiencies
Aggressive periodontitis
Rankings
Ranking Based On Selection: 78
Mustafa Al Zoughool
Metrics
H-Index
i10 Index
Citation Counts
17
28
1,451
environmental exposure assessment
population health
toxicology
Rankings
Ranking Based On Selection: 79
Alaa Althubaiti
Metrics
H-Index
i10 Index
Citation Counts
16
24
3,799
Rankings
Ranking Based On Selection: 81
Basim Saleh Alsaywid
Metrics
H-Index
i10 Index
Citation Counts
16
21
820
Pediatric Urology
Clinical Epidemiology
Public Health
Rankings
Ranking Based On Selection: 82
Feras Alshomer
Metrics
H-Index
i10 Index
Citation Counts
16
18
716
Plastic Surgery
Microsurgery Supermicrosurgery
lymphedema reconstruction
Tissue engineering
3D printing
Rankings
Ranking Based On Selection: 83
Amir Babiker
Metrics
H-Index
i10 Index
Citation Counts
16
30
1,360
Rankings
Ranking Based On Selection: 84
Mohammed Hamad
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,033
DNA integrity
Oxidative Stress
Molecular Biology
Drug-Drug Interaction
Rankings
Ranking Based On Selection: 85
Nahar Alselaim
Metrics
H-Index
i10 Index
Citation Counts
16
19
1,740
General Surgery
Colorectal surgery
Oncology
Health Management
Rankings
Ranking Based On Selection: 87
Abdulmalik Alkatheri
Metrics
H-Index
i10 Index
Citation Counts
16
19
767
Rankings
Ranking Based On Selection: 88
Ismail Khatri
Metrics
H-Index
i10 Index
Citation Counts
16
24
1,294
Rankings
Ranking Based On Selection: 90
Wafaa Suwairi
Metrics
H-Index
i10 Index
Citation Counts
16
16
5,772
Rankings
Ranking Based On Selection: 91
Mohammad Arabi
Metrics
H-Index
i10 Index
Citation Counts
16
22
948
Rankings
Ranking Based On Selection: 92
Majed Alghoribi
Metrics
H-Index
i10 Index
Citation Counts
15
20
4,661
Rankings
Ranking Based On Selection: 93
Sami Alsolamy
Metrics
H-Index
i10 Index
Citation Counts
15
17
1,359
Rankings
Ranking Based On Selection: 94
Nawfal Aljerian
Metrics
H-Index
i10 Index
Citation Counts
15
23
1,076
Rankings
Ranking Based On Selection: 95
Omar B Da'ar
Metrics
H-Index
i10 Index
Citation Counts
15
22
991
Health Economics
Health Services & Public Health
Rankings
Ranking Based On Selection: 96
Ahmed Aljizeeri
Metrics
H-Index
i10 Index
Citation Counts
15
19
808
Rankings
Ranking Based On Selection: 97
Bakheet Aldosari
Metrics
H-Index
i10 Index
Citation Counts
15
21
871
Electronic Health Records
Public and Population Health Informatics
Consumer Health Informatics
Rankings
Ranking Based On Selection: 98
Raju Suresh Kumar
Metrics
H-Index
i10 Index
Citation Counts
15
17
929
Medical Physiology
Neuroscience
Medical Education
Cardio-Respiratory Physiology
Rankings
Ranking Based On Selection: 99
Osama I Alwassil
Metrics
H-Index
i10 Index
Citation Counts
14
19
577