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" (1,014,167 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
Todor Popov
allergology
asthma
COPD
clinical immunology
urticaria
Metrics
H-Index
i10 Index
Citation
56
117
23,950
* Rankings
Ranking Based On Selection :5
Georgi Momekov
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
Metrics
H-Index
i10 Index
Citation
36
118
4,436
* Rankings
Ranking Based On Selection :12
Alexander Shinkov
Endocrinology
Thyroid
Parathyroid
Metabolic bone disease
Metrics
H-Index
i10 Index
Citation
17
24
1,806
* Rankings
Ranking Based On Selection :13
Rumiana Simeonova
drug metabolism
drug toxicity
oxidative stress
drug interactions
Metrics
H-Index
i10 Index
Citation
16
25
841
* Rankings
Ranking Based On Selection :19
Aleksandar Shkondrov
natural products
saponins
flavonoids
phytochemistry
chromatography
Metrics
H-Index
i10 Index
Citation
13
16
642
* Rankings
Ranking Based On Selection :21
Raina Gergova
clinical microbiology
virulence factors
mechanisms of resistance to antimicrobials
Metrics
H-Index
i10 Index
Citation
13
17
474
* Rankings
Ranking Based On Selection :23
Daniela Petrova
CFPD
PTE
Obstructive sleep apkea
lung cancer
Covid -19 infection
Metrics
H-Index
i10 Index
Citation
13
16
488
* Rankings
Ranking Based On Selection :33
Dora Zlatareva
Diagnostic Imaging
Neuroradiology
Pediatric Neuroradiology
Virtual anthropoanatomy
Hybrid Imaging
Metrics
H-Index
i10 Index
Citation
11
12
342
* Rankings
Ranking Based On Selection :39
Ralitza Alexova
proteomics
protein chemistry
protein folding
nutrient stress
mass spectrometry
Metrics
H-Index
i10 Index
Citation
10
10
583
* Rankings
Ranking Based On Selection :40
Mariana P. Genova
diabetes
gestational diabetes
trace elements
adipose tissue
Metrics
H-Index
i10 Index
Citation
10
10
307
* Rankings
Ranking Based On Selection :42
Valeri Velev
Infectious diseases
Parasitology
Microbiology
Metrics
H-Index
i10 Index
Citation
9
9
394
* Rankings
Ranking Based On Selection :43
Valeri Velev
Infectious Diseases
Parasitology
Pediatrics
Microbiology
Metrics
H-Index
i10 Index
Citation
9
9
385
* Rankings
Ranking Based On Selection :44
Ivan Lyutakov
Gastroenterology
IBD
Endoscopy
Bile acid malabsorption
Microscopic colitis
Metrics
H-Index
i10 Index
Citation
9
8
988
* Rankings
Ranking Based On Selection :48
Dilyan Ferdinandov
medicine
neurosurgery
spinal surgery
oncology
neurosciences
Metrics
H-Index
i10 Index
Citation
9
9
261
* Rankings
Ranking Based On Selection :49
Konstantin Mitov
Pharmacoeconomics
Biostatistics
Epidemiology
Drug therapy efficiency and risks
Metrics
H-Index
i10 Index
Citation
9
8
333
* Rankings
Ranking Based On Selection :51
Milen Dimitrov
pharmaceutical technology
biopharmacy
pediatric drug forms
GMP
Statistical modelling
Metrics
H-Index
i10 Index
Citation
9
8
364
* Rankings
Ranking Based On Selection :53
Димитър Костадинов
Pulmonology
Interventional pulmonology
Lung cancer
Tuberculosis
Metrics
H-Index
i10 Index
Citation
9
8
282
* Rankings
Ranking Based On Selection :54
Angelika Velkova
public health
epidemiology
social determinants of health
health promotion
Metrics
H-Index
i10 Index
Citation
9
8
592
* Rankings
Ranking Based On Selection :55
Lydia Katrova
dental health
social medicine
medical ethics
sociology of dentistry
Metrics
H-Index
i10 Index
Citation
9
8
236
* Rankings
Ranking Based On Selection :62
Victor Manolov
Клинична лаборатория
Metrics
H-Index
i10 Index
Citation
8
5
210
* Rankings
Ranking Based On Selection :63
Lidia Georgieva
обществено здраве
здравна политика
епидемиология
риск мениджмънт в
Metrics
H-Index
i10 Index
Citation
8
6
367
* Rankings
Ranking Based On Selection :67
Marta Slavkova
nanoparticles
drug delivery
drug targeting
buopharmaceutical characterization
Metrics
H-Index
i10 Index
Citation
7
6
369
* Rankings
Ranking Based On Selection :68
Lozan Todorov
Oxidative stress
rare earths
Metrics
H-Index
i10 Index
Citation
7
6
197
* Rankings
Ranking Based On Selection :69
Dragomira Nikolova
oncogenetics
pharmacogenomics
neurodegenerative disorders
reproductive failure
immunogenetics
Metrics
H-Index
i10 Index
Citation
7
7
314
* Rankings
Ranking Based On Selection :70
Vasil Vasilev
Нефрология
Имунонефрология
Metrics
H-Index
i10 Index
Citation
7
7
238
* Rankings
Ranking Based On Selection :72
Galуa Yankova/ Галя Янкова|Galуa Trendafilova Yankova, Галя Янкова, Galya T. Yankova
обучение и образование в сферата на здравните грижи
Metrics
H-Index
i10 Index
Citation
7
5
160
* Rankings
Ranking Based On Selection :73
Dobrin Konstantinov
Pediatrics
Hematology
Oncology
Metrics
H-Index
i10 Index
Citation
7
5
130
* Rankings
Ranking Based On Selection :75
Pavlinka Petkova Dobrilova, Павлинка Петкова Добрилова|П. Добрилова
здравни грижи
обучение
професионалисти по здравни грижи
Metrics
H-Index
i10 Index
Citation
7
4
97
* Rankings
Ranking Based On Selection :77
Lubomir Traikov
microcirculation
signal transduction
nanotechnology
electromagnetic fields
VEGF
Metrics
H-Index
i10 Index
Citation
7
6
160
* Rankings
Ranking Based On Selection :82
Kalin Vidinov
Endocrine surgery
Thoracic surgery
Metrics
H-Index
i10 Index
Citation
6
5
188
* Rankings
Ranking Based On Selection :87
Tihomira Zlatanova
Икономика на здравеопазването
социална медицина
обща медицина
здравен мениджмънт
финансов мениджмънт в здравеопазването
Metrics
H-Index
i10 Index
Citation
6
5
190
* Rankings
Ranking Based On Selection :92
Rosen Petkov
Pulmonary diseases
Cardiology
Diagnostic ultrasound
intensive care.
Metrics
H-Index
i10 Index
Citation
6
4
202
* Rankings
Ranking Based On Selection :93
Zornitsa Mihaylova
oral surgery
dental stem cells
growth factors
Metrics
H-Index
i10 Index
Citation
6
4
183
* Rankings
Ranking Based On Selection :94
Radoslav Bilyukov
Sleep apnea
respiratory medicine
COPD
asthma
comorbidities.
Metrics
H-Index
i10 Index
Citation
6
4
177
* Rankings
Ranking Based On Selection :96
Антоанета Терзиева|Antoaneta Terzieva
Здравни грижи
Обществено здравеопазване
Metrics
H-Index
i10 Index
Citation
6
2
95
* Rankings
Ranking Based On Selection :98
Николай Попов Nikolay Popov
Икономика на здравеопазването
Приложение на ИКТ в здравеопазването
Metrics
H-Index
i10 Index
Citation
6
4
143
Rankings
Ranking Based On Selection: 1
Todor Popov
Metrics
H-Index
i10 Index
Citation Counts
56
117
23,950
allergology
asthma
COPD
clinical immunology
urticaria
Rankings
Ranking Based On Selection: 2
Irini Doytchinova
Metrics
H-Index
i10 Index
Citation Counts
43
104
10,672
Rankings
Ranking Based On Selection: 3
Irena Kostova
Metrics
H-Index
i10 Index
Citation Counts
40
85
7,680
Rankings
Ranking Based On Selection: 4
Boris Tenchov
Metrics
H-Index
i10 Index
Citation Counts
38
80
3,967
Rankings
Ranking Based On Selection: 5
Georgi Momekov
Metrics
H-Index
i10 Index
Citation Counts
36
118
4,436
Anticancer agents
Phytopharmacology
Multidrug resistance
Drug interactions
Antimicrobials
Rankings
Ranking Based On Selection: 6
Zdravko Kamenov
Metrics
H-Index
i10 Index
Citation Counts
30
74
4,131
Rankings
Ranking Based On Selection: 7
Nikolai Lazarov
Metrics
H-Index
i10 Index
Citation Counts
28
61
2,407
Rankings
Ranking Based On Selection: 9
Magdalena Kondeva-Burdina
Metrics
H-Index
i10 Index
Citation Counts
22
45
1,592
Rankings
Ranking Based On Selection: 10
Paraskev Nedialkov
Metrics
H-Index
i10 Index
Citation Counts
19
41
1,507
Rankings
Ranking Based On Selection: 11
Georgi Onchev
Metrics
H-Index
i10 Index
Citation Counts
18
20
1,916
Rankings
Ranking Based On Selection: 12
Alexander Shinkov
Metrics
H-Index
i10 Index
Citation Counts
17
24
1,806
Rankings
Ranking Based On Selection: 13
Rumiana Simeonova
Metrics
H-Index
i10 Index
Citation Counts
16
25
841
drug metabolism
drug toxicity
oxidative stress
drug interactions
Rankings
Ranking Based On Selection: 14
Boycho Landzhov
Metrics
H-Index
i10 Index
Citation Counts
16
33
977
Rankings
Ranking Based On Selection: 15
Ekaterina Kozuharova|Kozhuharova Kohuzarova Kohazurova
Metrics
H-Index
i10 Index
Citation Counts
16
31
1,078
Pollination Ecology
Plant Breeding Systems
Invasive plants
Ethnobotany
Rankings
Ranking Based On Selection: 16
Nikolay Ishkitiev
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,093
Rankings
Ranking Based On Selection: 17
Nevena Chakarova
Metrics
H-Index
i10 Index
Citation Counts
14
21
845
Rankings
Ranking Based On Selection: 18
Maria Staevska
Metrics
H-Index
i10 Index
Citation Counts
14
18
1,342
Rankings
Ranking Based On Selection: 19
Aleksandar Shkondrov
Metrics
H-Index
i10 Index
Citation Counts
13
16
642
natural products
saponins
flavonoids
phytochemistry
chromatography
Rankings
Ranking Based On Selection: 20
Aleksandrina Vlahova
Metrics
H-Index
i10 Index
Citation Counts
13
15
791
Rankings
Ranking Based On Selection: 21
Raina Gergova
Metrics
H-Index
i10 Index
Citation Counts
13
17
474
clinical microbiology
virulence factors
mechanisms of resistance to antimicrobials
Rankings
Ranking Based On Selection: 22
Irina Nikolova
Metrics
H-Index
i10 Index
Citation Counts
13
18
1,204
Rankings
Ranking Based On Selection: 23
Daniela Petrova
Metrics
H-Index
i10 Index
Citation Counts
13
16
488
CFPD
PTE
Obstructive sleep apkea
lung cancer
Covid -19 infection
Rankings
Ranking Based On Selection: 24
Adriana Bakalova
Metrics
H-Index
i10 Index
Citation Counts
13
17
562
Rankings
Ranking Based On Selection: 25
Parvathy Mohanan
Metrics
H-Index
i10 Index
Citation Counts
12
14
393
Rankings
Ranking Based On Selection: 26
Borislav Tzankov
Metrics
H-Index
i10 Index
Citation Counts
12
13
471
Rankings
Ranking Based On Selection: 28
A Savova|Alexandra Tzenova-Savova
Metrics
H-Index
i10 Index
Citation Counts
12
15
652
Rankings
Ranking Based On Selection: 29
Ilko Getov
Metrics
H-Index
i10 Index
Citation Counts
12
14
476
Rankings
Ranking Based On Selection: 30
Stanimir Sirakov
Metrics
H-Index
i10 Index
Citation Counts
11
14
337
Rankings
Ranking Based On Selection: 31
Zlatina Kokanova-Nedialkova
Metrics
H-Index
i10 Index
Citation Counts
11
14
436
Rankings
Ranking Based On Selection: 32
Ivo Sirakov
Metrics
H-Index
i10 Index
Citation Counts
11
15
422
Rankings
Ranking Based On Selection: 33
Dora Zlatareva
Metrics
H-Index
i10 Index
Citation Counts
11
12
342
Diagnostic Imaging
Neuroradiology
Pediatric Neuroradiology
Virtual anthropoanatomy
Hybrid Imaging
Rankings
Ranking Based On Selection: 34
Miglena Doneva
Metrics
H-Index
i10 Index
Citation Counts
11
12
391
Rankings
Ranking Based On Selection: 35
Elena Arabadzhieva
Metrics
H-Index
i10 Index
Citation Counts
10
10
473
Rankings
Ranking Based On Selection: 36
Evgeni Zhivkov
Metrics
H-Index
i10 Index
Citation Counts
10
10
337
Rankings
Ranking Based On Selection: 37
Pavlina Gateva
Metrics
H-Index
i10 Index
Citation Counts
10
10
364
Rankings
Ranking Based On Selection: 38
Maria Dencheva
Metrics
H-Index
i10 Index
Citation Counts
10
11
258
Rankings
Ranking Based On Selection: 39
Ralitza Alexova
Metrics
H-Index
i10 Index
Citation Counts
10
10
583
proteomics
protein chemistry
protein folding
nutrient stress
mass spectrometry
Rankings
Ranking Based On Selection: 40
Mariana P. Genova
Metrics
H-Index
i10 Index
Citation Counts
10
10
307
diabetes
gestational diabetes
trace elements
adipose tissue
Rankings
Ranking Based On Selection: 41
Dimitar Maslarov
Metrics
H-Index
i10 Index
Citation Counts
9
9
1,035
Rankings
Ranking Based On Selection: 42
Valeri Velev
Metrics
H-Index
i10 Index
Citation Counts
9
9
394
Infectious diseases
Parasitology
Microbiology
Rankings
Ranking Based On Selection: 43
Valeri Velev
Metrics
H-Index
i10 Index
Citation Counts
9
9
385
Rankings
Ranking Based On Selection: 44
Ivan Lyutakov
Metrics
H-Index
i10 Index
Citation Counts
9
8
988
Gastroenterology
IBD
Endoscopy
Bile acid malabsorption
Microscopic colitis
Rankings
Ranking Based On Selection: 45
Nina Yancheva
Metrics
H-Index
i10 Index
Citation Counts
9
8
282
Rankings
Ranking Based On Selection: 46
Natalia Gateva
Metrics
H-Index
i10 Index
Citation Counts
9
8
307
Rankings
Ranking Based On Selection: 48
Dilyan Ferdinandov
Metrics
H-Index
i10 Index
Citation Counts
9
9
261
medicine
neurosurgery
spinal surgery
oncology
neurosciences
Rankings
Ranking Based On Selection: 49
Konstantin Mitov
Metrics
H-Index
i10 Index
Citation Counts
9
8
333
Pharmacoeconomics
Biostatistics
Epidemiology
Drug therapy efficiency and risks
Rankings
Ranking Based On Selection: 50
Анатомия
физиология
неврология
Rankings
Ranking Based On Selection: 51
Milen Dimitrov
Metrics
H-Index
i10 Index
Citation Counts
9
8
364
pharmaceutical technology
biopharmacy
pediatric drug forms
GMP
Statistical modelling
Rankings
Ranking Based On Selection: 52
Dobrina Tsvetkova
Metrics
H-Index
i10 Index
Citation Counts
9
8
311
Rankings
Ranking Based On Selection: 53
Димитър Костадинов
Metrics
H-Index
i10 Index
Citation Counts
9
8
282
Pulmonology
Interventional pulmonology
Lung cancer
Tuberculosis
Rankings
Ranking Based On Selection: 54
Angelika Velkova
Metrics
H-Index
i10 Index
Citation Counts
9
8
592
public health
epidemiology
social determinants of health
health promotion
Rankings
Ranking Based On Selection: 55
Lydia Katrova
Metrics
H-Index
i10 Index
Citation Counts
9
8
236
dental health
social medicine
medical ethics
sociology of dentistry
Rankings
Ranking Based On Selection: 56
Blagovest Bechev
Metrics
H-Index
i10 Index
Citation Counts
9
9
376
Rankings
Ranking Based On Selection: 57
Vasil Karakostov
Metrics
H-Index
i10 Index
Citation Counts
8
7
170
Rankings
Ranking Based On Selection: 58
Radosveta Vasileva
Metrics
H-Index
i10 Index
Citation Counts
8
6
193
Rankings
Ranking Based On Selection: 59
Silviya Abarova
Metrics
H-Index
i10 Index
Citation Counts
8
7
217
Rankings
Ranking Based On Selection: 60
Elka Radeva
Metrics
H-Index
i10 Index
Citation Counts
8
6
206
Rankings
Ranking Based On Selection: 61
Petranka Zdraveva
Metrics
H-Index
i10 Index
Citation Counts
8
5
334
Rankings
Ranking Based On Selection: 62
Victor Manolov
Metrics
H-Index
i10 Index
Citation Counts
8
5
210
Клинична лаборатория
Rankings
Ranking Based On Selection: 63
Lidia Georgieva
Metrics
H-Index
i10 Index
Citation Counts
8
6
367
обществено здраве
здравна политика
епидемиология
риск мениджмънт в
Rankings
Ranking Based On Selection: 64
Gencho Genchev
Metrics
H-Index
i10 Index
Citation Counts
8
7
137
Rankings
Ranking Based On Selection: 65
Victor Zlatkov
Metrics
H-Index
i10 Index
Citation Counts
8
6
421
Rankings
Ranking Based On Selection: 66
Liliya Simonova
Metrics
H-Index
i10 Index
Citation Counts
7
7
168
Rankings
Ranking Based On Selection: 67
Marta Slavkova
Metrics
H-Index
i10 Index
Citation Counts
7
6
369
nanoparticles
drug delivery
drug targeting
buopharmaceutical characterization
Rankings
Ranking Based On Selection: 68
Lozan Todorov
Metrics
H-Index
i10 Index
Citation Counts
7
6
197
Oxidative stress
rare earths
Rankings
Ranking Based On Selection: 69
Dragomira Nikolova
Metrics
H-Index
i10 Index
Citation Counts
7
7
314
oncogenetics
pharmacogenomics
neurodegenerative disorders
reproductive failure
immunogenetics
Rankings
Ranking Based On Selection: 70
Vasil Vasilev
Metrics
H-Index
i10 Index
Citation Counts
7
7
238
Нефрология
Имунонефрология
Rankings
Ranking Based On Selection: 71
Radka Tafradjiiska Hadjiolova
Metrics
H-Index
i10 Index
Citation Counts
7
7
205
Cancer
Oncology
Pathophysiology
Rankings
Ranking Based On Selection: 72
обучение и образование в сферата на здравните грижи
Rankings
Ranking Based On Selection: 73
Dobrin Konstantinov
Metrics
H-Index
i10 Index
Citation Counts
7
5
130
Pediatrics
Hematology
Oncology
Rankings
Ranking Based On Selection: 74
Kirov D
Metrics
H-Index
i10 Index
Citation Counts
7
4
188
Rankings
Ranking Based On Selection: 75
здравни грижи
обучение
професионалисти по здравни грижи
Rankings
Ranking Based On Selection: 76
Stefi Delimitreva
Metrics
H-Index
i10 Index
Citation Counts
7
7
281
Rankings
Ranking Based On Selection: 77
Lubomir Traikov
Metrics
H-Index
i10 Index
Citation Counts
7
6
160
microcirculation
signal transduction
nanotechnology
electromagnetic fields
VEGF
Rankings
Ranking Based On Selection: 78
промоция на здравето
Rankings
Ranking Based On Selection: 79
Sasho Bonev
Metrics
H-Index
i10 Index
Citation Counts
7
3
113
Rankings
Ranking Based On Selection: 80
Boyka Tsvetkova
Metrics
H-Index
i10 Index
Citation Counts
7
3
84
Rankings
Ranking Based On Selection: 81
Snezhanka Topalova
Metrics
H-Index
i10 Index
Citation Counts
7
1
75
Rankings
Ranking Based On Selection: 82
Kalin Vidinov
Metrics
H-Index
i10 Index
Citation Counts
6
5
188
Endocrine surgery
Thoracic surgery
Rankings
Ranking Based On Selection: 83
Nadya Avramova
Metrics
H-Index
i10 Index
Citation Counts
6
3
127
Rankings
Ranking Based On Selection: 84
Alexandrina Vodenicharova
Metrics
H-Index
i10 Index
Citation Counts
6
2
252
Rankings
Ranking Based On Selection: 85
Emilio Mateev
Metrics
H-Index
i10 Index
Citation Counts
6
2
119
Rankings
Ranking Based On Selection: 86
Petra Marinova|Petra MarinovaDjambazova
Metrics
H-Index
i10 Index
Citation Counts
6
6
157
Rankings
Ranking Based On Selection: 87
Tihomira Zlatanova
Metrics
H-Index
i10 Index
Citation Counts
6
5
190
Икономика на здравеопазването
социална медицина
обща медицина
здравен мениджмънт
финансов мениджмънт в здравеопазването
Rankings
Ranking Based On Selection: 88
Bilyana Georgieva
Metrics
H-Index
i10 Index
Citation Counts
6
5
160
Rankings
Ranking Based On Selection: 89
Radulova P
Metrics
H-Index
i10 Index
Citation Counts
6
5
122
Rankings
Ranking Based On Selection: 90
Elena Kinova
Metrics
H-Index
i10 Index
Citation Counts
6
4
1,918
Rankings
Ranking Based On Selection: 91
Stefan Naydenov
Metrics
H-Index
i10 Index
Citation Counts
6
4
215
Rankings
Ranking Based On Selection: 92
Rosen Petkov
Metrics
H-Index
i10 Index
Citation Counts
6
4
202
Pulmonary diseases
Cardiology
Diagnostic ultrasound
intensive care.
Rankings
Ranking Based On Selection: 93
Zornitsa Mihaylova
Metrics
H-Index
i10 Index
Citation Counts
6
4
183
oral surgery
dental stem cells
growth factors
Rankings
Ranking Based On Selection: 94
Radoslav Bilyukov
Metrics
H-Index
i10 Index
Citation Counts
6
4
177
Sleep apnea
respiratory medicine
COPD
asthma
comorbidities.
Rankings
Ranking Based On Selection: 95
Krassimir Yanev
Metrics
H-Index
i10 Index
Citation Counts
6
3
175
Rankings
Ranking Based On Selection: 96
Здравни грижи
Обществено здравеопазване
Rankings
Ranking Based On Selection: 97
Lyubomir Raev
Metrics
H-Index
i10 Index
Citation Counts
6
5
185
Rankings
Ranking Based On Selection: 98
Николай Попов Nikolay Popov
Metrics
H-Index
i10 Index
Citation Counts
6
4
143
Икономика на здравеопазването
Приложение на ИКТ в здравеопазването
Rankings
Ranking Based On Selection: 99
Yanka Petkova Prodanova
Metrics
H-Index
i10 Index
Citation Counts
6
1
126
Rankings
Ranking Based On Selection: 100
Maya D Markova
Metrics
H-Index
i10 Index
Citation Counts
6
1
107