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" (870,057 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
Richard O Day
clinical pharmacology
rheumatology
pain
inflammation
gout
Metrics
H-Index
i10 Index
Citation
80
414
37,267
* Rankings
Ranking Based On Selection: 2
Helga Zoega
pharmacoepidemiology
mental health
real-world data
psychotropic medications
lifecourse
Metrics
H-Index
i10 Index
Citation
39
78
5,832
Natasa Gisev
pharmacoepidemiology
psychotropic drugs
opioids
mental health
Metrics
H-Index
i10 Index
Citation
27
55
4,110
Juliana de Oliveira Costa
Pharmacoepidemiology
real-world evidence
health economics and outcomes research
health technology assessment
Metrics
H-Index
i10 Index
Citation
20
35
1,290
Rankings
Ranking Based On Selection: 1
Richard O Day
Metrics
H-Index
i10 Index
Citation Counts
80
414
37,267
Rankings
Ranking Based On Selection: 2
Helga Zoega
Metrics
H-Index
i10 Index
Citation Counts
39
78
5,832
pharmacoepidemiology
mental health
real-world data
psychotropic medications
lifecourse
Rankings
Ranking Based On Selection: 3
Natasa Gisev
Metrics
H-Index
i10 Index
Citation Counts
27
55
4,110
Rankings
Ranking Based On Selection: 4
Jonathan Brett
Metrics
H-Index
i10 Index
Citation Counts
23
39
1,642
Rankings
Ranking Based On Selection: 5
Juliana de Oliveira Costa
Metrics
H-Index
i10 Index
Citation Counts
20
35
1,290
Pharmacoepidemiology
real-world evidence
health economics and outcomes research
health technology assessment
Rankings
Ranking Based On Selection: 6
Syed Haris Omar|Omar, S. H.
Metrics
H-Index
i10 Index
Citation Counts
16
18
2,193
Pharmacology
Neuropharmacology
Clinical Pharmacology
Natural Products
Rankings
Ranking Based On Selection: 7
Rocky Chau
Metrics
H-Index
i10 Index
Citation Counts
10
10
774