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" (875,720 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
Ahmad Daryani
Toxoplasmosis Research Center (TRC)
Mazandaran University of Medical Sciences
Sari
Iran
Metrics
H-Index
i10 Index
Citation
76
205
94,710
* Rankings
Ranking Based On Selection: 2
Alireza Rafiei
Immunology. Immunogenetics
Tumor immunology
Infectious immunity
Metrics
H-Index
i10 Index
Citation
72
203
95,882
* Rankings
Ranking Based On Selection: 7
Amirhossein Ahmadi
NanoRadioPharmaceutical
Pharmacology
Radiation Biology
Natural Product
Radotherapy & chemotherapy
Metrics
H-Index
i10 Index
Citation
45
84
4,970
* Rankings
Ranking Based On Selection: 8
Hamid Sharif Nia
Biostatistics
Methodology
Nursing
Death Anxiety
Phenomenological Qualitative Research
Metrics
H-Index
i10 Index
Citation
42
165
6,338

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* Rankings
Ranking Based On Selection: 15
Masoumeh Bagheri Nesami
Medical-Surgical Nursing- Geriateric Nursing- Emergency and Critical care Nursing- Medical Education- Complementary and Alternat
Metrics
H-Index
i10 Index
Citation
35
83
3,922
* Rankings
Ranking Based On Selection: 22
Mohsen Aarabi
Epidemiology
Evidence-Based Practice
Primary Health Care
Family Medicine
Universal Health Covera
Metrics
H-Index
i10 Index
Citation
32
64
3,406
* Rankings
Ranking Based On Selection: 24
Zeinab Hamzehgardeshi
Sexual and Reproductive Health
Evidence Based Practice
Adolescent Health
Women Health
Midwifery
Metrics
H-Index
i10 Index
Citation
30
65
3,634
* Rankings
Ranking Based On Selection: 29
Shirzad Gholami
Human Parasitology ( Taxonomy
Epidemilogy and Molecular parasitology)
Phylogeny of helminth
Metrics
H-Index
i10 Index
Citation
27
75
2,416
* Rankings
Ranking Based On Selection: 34
Akbar Hedayatizadeh Omran
Medical Doctor
Ph.D in molecular medicine
Associate Professor
Metrics
H-Index
i10 Index
Citation
25
48
31,699
* Rankings
Ranking Based On Selection: 35
Pedram Ebrahimnejad
Pharmaceutical Nanotechnology
Pharmaceutics
Novel Drug Delivery Systems
Gene Delivery
Metrics
H-Index
i10 Index
Citation
25
35
1,546
* Rankings
Ranking Based On Selection: 36
Fatemeh Ahangarkani
Sepsis
Pneumonia
Antimicrobial Resistant
Nosocomial Infection
Molecular biology
Metrics
H-Index
i10 Index
Citation
25
45
1,694
* Rankings
Ranking Based On Selection: 37
Iradj Maleki
Inflammatory Bowel Disease
FGID
Helicobacter pylori
Gastrointestinal Cancers
NAFLD
Metrics
H-Index
i10 Index
Citation
25
47
3,717
* Rankings
Ranking Based On Selection: 41
Abolghasem Ajami
immunology of infectious diseases and cancer immunology
Metrics
H-Index
i10 Index
Citation
24
55
2,190
* Rankings
Ranking Based On Selection: 43
Ghassem Abedi
Health
Health Care Management
quality of care
quality of life
Metrics
H-Index
i10 Index
Citation
23
51
1,755
* Rankings
Ranking Based On Selection: 46
Vida Shafipour
Medical Surgical Nursing
Nursig Education
Ethices
Medical Education Critical Care
Nursing ethics
Metrics
H-Index
i10 Index
Citation
22
36
1,388
* Rankings
Ranking Based On Selection: 50
Hedayat Jafari
Medical Surgical Nursing
Nursing Education
Critical care
Nursing Ethics
Metrics
H-Index
i10 Index
Citation
21
47
1,472
* Rankings
Ranking Based On Selection: 58
Emran Habibi|Omran habibi
Phytochemistry
Chromatography
Herbal Medicine
Natural Products Chemistry
Medicinal Mushrooms
Metrics
H-Index
i10 Index
Citation
19
25
1,109
* Rankings
Ranking Based On Selection: 59
Roya Ghasemian
infectious diseases
antimicrobial resistance
hepatitis
STD
Metrics
H-Index
i10 Index
Citation
19
29
1,059
* Rankings
Ranking Based On Selection: 60
Hadi Darvishi Khezri
Thalassemia
Clinical Sciences
Critical Care Nursing
Pharmacology
Metrics
H-Index
i10 Index
Citation
19
27
951
* Rankings
Ranking Based On Selection: 62
Gholamreza Houshmand
Neuropharmacology
Inflammation
Imunopharmacology
Wound healing
Clinical Trials
Metrics
H-Index
i10 Index
Citation
18
33
1,021
* Rankings
Ranking Based On Selection: 68
S Mohammad Moosavi
Psychiatry
Pharmacology
Neurology
Cognitive Sciences
Metrics
H-Index
i10 Index
Citation
17
35
1,154
* Rankings
Ranking Based On Selection: 70
Hamed Aminiahidashti
Critical care
Acute care
Patient monitoring
Emergency medicine
Metrics
H-Index
i10 Index
Citation
16
23
776
* Rankings
Ranking Based On Selection: 71
Masoud Keighobadi
Pharmaceutical Sciences (Assistant Professor in Pharmaceutical Sciences)
Metrics
H-Index
i10 Index
Citation
16
22
14,923
* Rankings
Ranking Based On Selection: 72
Alireza Davoudi
Infectious diseases
Antimicrobial resistance
Nosocomil infection
Metrics
H-Index
i10 Index
Citation
16
22
885
* Rankings
Ranking Based On Selection: 75
Aria Soleimani
Anesthesiology
Cardiac Anesthesia
Intensive Care Medicine
Cardiology
Metrics
H-Index
i10 Index
Citation
15
21
770
* Rankings
Ranking Based On Selection: 79
Narges Najafi
Infectious diseases
Antimicrobial resistance
Hepatitis
STD
Leptospirosis
Metrics
H-Index
i10 Index
Citation
15
27
710
* Rankings
Ranking Based On Selection: 81
Soheil Azizi
Pathology
Laboratory Science
Hematology
Histology
Cytology
Metrics
H-Index
i10 Index
Citation
14
18
776
* Rankings
Ranking Based On Selection: 85
MR Rafati
Clinical Pharmacy
Pediatric and Neonatal Pharmacotherapy
Pharmacokinetics
Metrics
H-Index
i10 Index
Citation
14
17
840
* Rankings
Ranking Based On Selection: 92
Saeid Taghiloo
Immunology
Cancer Biology
Immunotherapy
Reproductive Immunology
Metrics
H-Index
i10 Index
Citation
12
14
503
* Rankings
Ranking Based On Selection: 93
Marzieh Zamaniyan
Infertility
Obstetrics
Gynecology
Reproduction
Reproductive Endocrinology
Metrics
H-Index
i10 Index
Citation
12
13
1,088
Rankings
Ranking Based On Selection: 1
Ahmad Daryani
Metrics
H-Index
i10 Index
Citation Counts
76
205
94,710
Toxoplasmosis Research Center (TRC)
Mazandaran University of Medical Sciences
Sari
Iran
Rankings
Ranking Based On Selection: 2
Alireza Rafiei
Metrics
H-Index
i10 Index
Citation Counts
72
203
95,882
Immunology. Immunogenetics
Tumor immunology
Infectious immunity
Rankings
Ranking Based On Selection: 3
Saeed Emami
Metrics
H-Index
i10 Index
Citation Counts
64
192
11,716
Rankings
Ranking Based On Selection: 4
Mahmood Moosazadeh
Metrics
H-Index
i10 Index
Citation Counts
61
265
56,335
Rankings
Ranking Based On Selection: 5
Majid Saeedi
Metrics
H-Index
i10 Index
Citation Counts
49
151
7,987
Rankings
Ranking Based On Selection: 6
Seyed Jalal Hosseinimehr
Metrics
H-Index
i10 Index
Citation Counts
46
170
9,903
Radiopharmaceuticals
Radiobiology
Molecular Imaging
Cancer Imaging
Rankings
Ranking Based On Selection: 7
Amirhossein Ahmadi
Metrics
H-Index
i10 Index
Citation Counts
45
84
4,970
NanoRadioPharmaceutical
Pharmacology
Radiation Biology
Natural Product
Radotherapy & chemotherapy
Rankings
Ranking Based On Selection: 8
Hamid Sharif Nia
Metrics
H-Index
i10 Index
Citation Counts
42
165
6,338
Biostatistics
Methodology
Nursing
Death Anxiety
Phenomenological Qualitative Research
Rankings
Ranking Based On Selection: 9
Sobhan Mortazavi Derazkola
Metrics
H-Index
i10 Index
Citation Counts
41
61
3,995
Nanotechnology
Photocatalysis
Drug Delivery
Anticancer
Antibacterial
Rankings
Ranking Based On Selection: 10
Ahmadali Enayati
Metrics
H-Index
i10 Index
Citation Counts
40
86
43,087

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Rankings
Ranking Based On Selection: 11
Alireza Khalilian
Metrics
H-Index
i10 Index
Citation Counts
39
98
5,398
Rankings
Ranking Based On Selection: 12
Katayoun Morteza Semnani
Metrics
H-Index
i10 Index
Citation Counts
37
114
4,585
Rankings
Ranking Based On Selection: 13
Shahabeddin Sarvi
Metrics
H-Index
i10 Index
Citation Counts
36
97
4,167
Rankings
Ranking Based On Selection: 14
Seyed Reza Aghili
Metrics
H-Index
i10 Index
Citation Counts
35
114
5,334
Rankings
Ranking Based On Selection: 15
Masoumeh Bagheri Nesami
Metrics
H-Index
i10 Index
Citation Counts
35
83
3,922
Medical-Surgical Nursing- Geriateric Nursing- Emergency and Critical care Nursing- Medical Education- Complementary and Alternat
Rankings
Ranking Based On Selection: 16
Jafar Akbari
Metrics
H-Index
i10 Index
Citation Counts
34
65
3,259
Rankings
Ranking Based On Selection: 18
Mohammad Azadbakht
Metrics
H-Index
i10 Index
Citation Counts
34
106
4,444
Rankings
Ranking Based On Selection: 20
Nouraddin Mousavinasab
Metrics
H-Index
i10 Index
Citation Counts
33
86
3,533
Rankings
Ranking Based On Selection: 21
Davood Anvari
Metrics
H-Index
i10 Index
Citation Counts
32
53
24,641
Rankings
Ranking Based On Selection: 22
Mohsen Aarabi
Metrics
H-Index
i10 Index
Citation Counts
32
64
3,406
Epidemiology
Evidence-Based Practice
Primary Health Care
Family Medicine
Universal Health Covera
Rankings
Ranking Based On Selection: 23
Amir Emami Zeydi
Metrics
H-Index
i10 Index
Citation Counts
31
76
2,615
Rankings
Ranking Based On Selection: 24
Zeinab Hamzehgardeshi
Metrics
H-Index
i10 Index
Citation Counts
30
65
3,634
Sexual and Reproductive Health
Evidence Based Practice
Adolescent Health
Women Health
Midwifery
Rankings
Ranking Based On Selection: 25
Amir Hossein Goudarzian
Metrics
H-Index
i10 Index
Citation Counts
28
47
11,298
Rankings
Ranking Based On Selection: 26
Ghasem Janbabai
Metrics
H-Index
i10 Index
Citation Counts
27
77
2,949
Rankings
Ranking Based On Selection: 27
Saeid Abediankenari
Metrics
H-Index
i10 Index
Citation Counts
27
78
2,737
Rankings
Ranking Based On Selection: 28
Ebrahim Salehifar
Metrics
H-Index
i10 Index
Citation Counts
27
64
2,320
Rankings
Ranking Based On Selection: 29
Shirzad Gholami
Metrics
H-Index
i10 Index
Citation Counts
27
75
2,416
Human Parasitology ( Taxonomy
Epidemilogy and Molecular parasitology)
Phylogeny of helminth
Rankings
Ranking Based On Selection: 30
Mehran Zarghami
Metrics
H-Index
i10 Index
Citation Counts
27
71
2,682
Rankings
Ranking Based On Selection: 31
Farshad Naghshvar
Metrics
H-Index
i10 Index
Citation Counts
27
48
2,158
Rankings
Ranking Based On Selection: 32
Hossein Asgarian Omran
Metrics
H-Index
i10 Index
Citation Counts
26
49
1,822
Rankings
Ranking Based On Selection: 33
Seyed Hamzeh Hosseini
Metrics
H-Index
i10 Index
Citation Counts
26
69
2,609
Rankings
Ranking Based On Selection: 34
Akbar Hedayatizadeh Omran
Metrics
H-Index
i10 Index
Citation Counts
25
48
31,699
Medical Doctor
Ph.D in molecular medicine
Associate Professor
Rankings
Ranking Based On Selection: 35
Pedram Ebrahimnejad
Metrics
H-Index
i10 Index
Citation Counts
25
35
1,546
Pharmaceutical Nanotechnology
Pharmaceutics
Novel Drug Delivery Systems
Gene Delivery
Rankings
Ranking Based On Selection: 36
Fatemeh Ahangarkani
Metrics
H-Index
i10 Index
Citation Counts
25
45
1,694
Sepsis
Pneumonia
Antimicrobial Resistant
Nosocomial Infection
Molecular biology
Rankings
Ranking Based On Selection: 37
Iradj Maleki
Metrics
H-Index
i10 Index
Citation Counts
25
47
3,717
Inflammatory Bowel Disease
FGID
Helicobacter pylori
Gastrointestinal Cancers
NAFLD
Rankings
Ranking Based On Selection: 38
Abdol Sattar Pagheh
Metrics
H-Index
i10 Index
Citation Counts
24
53
1,946
Rankings
Ranking Based On Selection: 39
Narges Karimi
Metrics
H-Index
i10 Index
Citation Counts
24
34
39,210
Rankings
Ranking Based On Selection: 40
Farhang Babamahmoodi
Metrics
H-Index
i10 Index
Citation Counts
24
58
1,962
Rankings
Ranking Based On Selection: 41
Abolghasem Ajami
Metrics
H-Index
i10 Index
Citation Counts
24
55
2,190
immunology of infectious diseases and cancer immunology
Rankings
Ranking Based On Selection: 42
Forouzan Elyasi
Metrics
H-Index
i10 Index
Citation Counts
23
54
1,839
Rankings
Ranking Based On Selection: 43
Ghassem Abedi
Metrics
H-Index
i10 Index
Citation Counts
23
51
1,755
Health
Health Care Management
quality of care
quality of life
Rankings
Ranking Based On Selection: 45
Mohammadreza Habibi|habibi M.R
Metrics
H-Index
i10 Index
Citation Counts
22
40
1,271
Rankings
Ranking Based On Selection: 46
Vida Shafipour
Metrics
H-Index
i10 Index
Citation Counts
22
36
1,388
Medical Surgical Nursing
Nursig Education
Ethices
Medical Education Critical Care
Nursing ethics
Rankings
Ranking Based On Selection: 47
Mehryar Zargari
Metrics
H-Index
i10 Index
Citation Counts
22
35
1,345
Rankings
Ranking Based On Selection: 48
Afshin Gholipour Baradari
Metrics
H-Index
i10 Index
Citation Counts
22
47
1,509
Rankings
Ranking Based On Selection: 50
Hedayat Jafari
Metrics
H-Index
i10 Index
Citation Counts
21
47
1,472
Medical Surgical Nursing
Nursing Education
Critical care
Nursing Ethics
Rankings
Ranking Based On Selection: 51
Hatef Ghasemi Hamidabadi
Metrics
H-Index
i10 Index
Citation Counts
21
38
1,290
Rankings
Ranking Based On Selection: 53
Hamid Irannejad
Metrics
H-Index
i10 Index
Citation Counts
20
36
1,394
Rankings
Ranking Based On Selection: 54
Ramin Ataee
Metrics
H-Index
i10 Index
Citation Counts
20
30
1,173
Rankings
Ranking Based On Selection: 55
Mohsen Tehrani
Metrics
H-Index
i10 Index
Citation Counts
20
39
1,546
Rankings
Ranking Based On Selection: 56
Mohammad Bagher Hashemi Soteh
Metrics
H-Index
i10 Index
Citation Counts
20
32
1,509
genetic disease
molecular genetics
molecular diagnosis
Rankings
Ranking Based On Selection: 57
Motahareh Kheradmand
Metrics
H-Index
i10 Index
Citation Counts
19
29
4,340
Rankings
Ranking Based On Selection: 58
Emran Habibi|Omran habibi
Metrics
H-Index
i10 Index
Citation Counts
19
25
1,109
Phytochemistry
Chromatography
Herbal Medicine
Natural Products Chemistry
Medicinal Mushrooms
Rankings
Ranking Based On Selection: 59
Roya Ghasemian
Metrics
H-Index
i10 Index
Citation Counts
19
29
1,059
infectious diseases
antimicrobial resistance
hepatitis
STD
Rankings
Ranking Based On Selection: 60
Hadi Darvishi Khezri
Metrics
H-Index
i10 Index
Citation Counts
19
27
951
Thalassemia
Clinical Sciences
Critical Care Nursing
Pharmacology
Rankings
Ranking Based On Selection: 61
Seyed Mahmoud Nouraei
Metrics
H-Index
i10 Index
Citation Counts
19
23
858
Rankings
Ranking Based On Selection: 62
Gholamreza Houshmand
Metrics
H-Index
i10 Index
Citation Counts
18
33
1,021
Neuropharmacology
Inflammation
Imunopharmacology
Wound healing
Clinical Trials
Rankings
Ranking Based On Selection: 63
Roghieh Nazari
Metrics
H-Index
i10 Index
Citation Counts
18
37
1,161
Rankings
Ranking Based On Selection: 64
Ebrahim Nasiri
Metrics
H-Index
i10 Index
Citation Counts
18
37
1,230
Rankings
Ranking Based On Selection: 65
Abolfazl Firouzian
Metrics
H-Index
i10 Index
Citation Counts
18
28
796
Rankings
Ranking Based On Selection: 66
Tooran Nayeri
Metrics
H-Index
i10 Index
Citation Counts
17
23
939
Rankings
Ranking Based On Selection: 68
S Mohammad Moosavi
Metrics
H-Index
i10 Index
Citation Counts
17
35
1,154
Psychiatry
Pharmacology
Neurology
Cognitive Sciences
Rankings
Ranking Based On Selection: 69
Mohammad Sadegh Rezai
Metrics
H-Index
i10 Index
Citation Counts
16
18
2,339
Rankings
Ranking Based On Selection: 70
Hamed Aminiahidashti
Metrics
H-Index
i10 Index
Citation Counts
16
23
776
Critical care
Acute care
Patient monitoring
Emergency medicine
Rankings
Ranking Based On Selection: 71
Masoud Keighobadi
Metrics
H-Index
i10 Index
Citation Counts
16
22
14,923
Pharmaceutical Sciences (Assistant Professor in Pharmaceutical Sciences)
Rankings
Ranking Based On Selection: 72
Alireza Davoudi
Metrics
H-Index
i10 Index
Citation Counts
16
22
885
Infectious diseases
Antimicrobial resistance
Nosocomil infection
Rankings
Ranking Based On Selection: 73
infectious diseases
Antibiotic resistance
tuberculosis
Hepatitis
Rankings
Ranking Based On Selection: 74
Esmaeil Akbari
Metrics
H-Index
i10 Index
Citation Counts
15
17
1,002
Rankings
Ranking Based On Selection: 75
Aria Soleimani
Metrics
H-Index
i10 Index
Citation Counts
15
21
770
Anesthesiology
Cardiac Anesthesia
Intensive Care Medicine
Cardiology
Rankings
Ranking Based On Selection: 76
Seyyed Payman Ziapour
Metrics
H-Index
i10 Index
Citation Counts
15
21
819
Ticks
Insecticides
Medical Entomology
Parasitology
Microbiology
Rankings
Ranking Based On Selection: 77
MR Shiran
Metrics
H-Index
i10 Index
Citation Counts
15
23
812
Rankings
Ranking Based On Selection: 78
Mozhdeh Mohammadian
Metrics
H-Index
i10 Index
Citation Counts
15
18
648
Hematology
Stem Cell-therapy
regenerative medicine
Rankings
Ranking Based On Selection: 79
Narges Najafi
Metrics
H-Index
i10 Index
Citation Counts
15
27
710
Infectious diseases
Antimicrobial resistance
Hepatitis
STD
Leptospirosis
Rankings
Ranking Based On Selection: 80
Hassan Nikookar
Metrics
H-Index
i10 Index
Citation Counts
14
21
683
Rankings
Ranking Based On Selection: 81
Soheil Azizi
Metrics
H-Index
i10 Index
Citation Counts
14
18
776
Pathology
Laboratory Science
Hematology
Histology
Cytology
Rankings
Ranking Based On Selection: 83
Farzad Motevalli Hi
Metrics
H-Index
i10 Index
Citation Counts
14
21
642
Rankings
Ranking Based On Selection: 84
Seyed Abdollah Mousavi
Metrics
H-Index
i10 Index
Citation Counts
14
18
863
Rankings
Ranking Based On Selection: 85
MR Rafati
Metrics
H-Index
i10 Index
Citation Counts
14
17
840
Clinical Pharmacy
Pediatric and Neonatal Pharmacotherapy
Pharmacokinetics
Rankings
Ranking Based On Selection: 88
Noushin Mousazadeh
Metrics
H-Index
i10 Index
Citation Counts
13
16
682
Rankings
Ranking Based On Selection: 89
Mohammad Hosseininejad
Metrics
H-Index
i10 Index
Citation Counts
13
20
549
emergency medicine
trauma
critical care
pain management
Rankings
Ranking Based On Selection: 91
Hamid Mohammadjafari
Metrics
H-Index
i10 Index
Citation Counts
13
16
497
Urinary tract infection
prenatal Hydronephrosis
Rankings
Ranking Based On Selection: 92
Saeid Taghiloo
Metrics
H-Index
i10 Index
Citation Counts
12
14
503
Immunology
Cancer Biology
Immunotherapy
Reproductive Immunology
Rankings
Ranking Based On Selection: 93
Marzieh Zamaniyan
Metrics
H-Index
i10 Index
Citation Counts
12
13
1,088
Infertility
Obstetrics
Gynecology
Reproduction
Reproductive Endocrinology
Rankings
Ranking Based On Selection: 94
Azadeh Memarian
Metrics
H-Index
i10 Index
Citation Counts
12
17
411
Rankings
Ranking Based On Selection: 96
Ali Siahposht-Khachaki
Metrics
H-Index
i10 Index
Citation Counts
12
14
388
Rankings
Ranking Based On Selection: 97
Mahmonir Danesh
Metrics
H-Index
i10 Index
Citation Counts
12
14
771
Rankings
Ranking Based On Selection: 98
Gohar Eslami
Metrics
H-Index
i10 Index
Citation Counts
12
13
584
Rankings
Ranking Based On Selection: 99
Zahra Heidari
Metrics
H-Index
i10 Index
Citation Counts
11
11
576
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