Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 527 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
child health
paediatric
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,163
5,723
0.563
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Maternal health
reproductive tract infection
HIV
research ethic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,891
3,037
0.342
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Medicin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,648
1,747
0.309
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Composite materials
Natural fibre composite
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,869
1,794
0.368
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Pediatric HIV
HIV Drug Resistance
Development of tools for HIV Care
Adolescent Medicine
Neonatolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,559
1,943
0.426
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Occupational Health
Physiotherap
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,304
2,124
0.493
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,904
2,018
0.517
* Total Citation Counts Rankings
Ranking Based On Selection: 8
adolescent HIV specifically transitioning of HIV infected children from paediatric to adult focused care
children living in especially difficult circumstances
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,801
1,751
0.461
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Internal Medicine
Chest Medicine
Health Informatic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,261
1,615
0.495
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Animal Breeding and Genetic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,218
1,055
0.328
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Obstetrics/Gynecology
cervical cancer prevention
obstetric fistula
charity wor
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,007
1,829
0.608
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Public Health
Esophageal Cancer Research
Malaria Researc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,995
2,091
0.698
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Engineering Surveying
Satellite Remote Sensing
Applied AI
Hydroinformatics
Photogrammetr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,899
1,921
0.663
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Bioethics
African Studies
Qualitative Research
Care Seeking Behavior
Disease Stigm
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,659
1,963
0.738
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Energy and the environmen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,339
869
0.372
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Relationship between academic centers Healthcare care systems for under-served population
Internal medicin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,187
314
0.144
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Biostatistic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,153
1,349
0.627
* Total Citation Counts Rankings
Ranking Based On Selection: 18
E-Learning
Recommender Systems
Internet of Things
Data Mining
Open Source Softwar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,025
1,533
0.757
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Water Resources Engineering
Irrigation Water Managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,752
778
0.444
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Immunology
Oncology
Biobanking and Genetic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,703
654
0.384
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Endocrinology
NCDs
implementation researc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,594
1,103
0.692
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Sustainable Tourism
community based tourism
tourism and resilience
Wildlife based tourism
Pro-poor touris
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,511
540
0.357
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Internal Medicin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,469
605
0.412
* Total Citation Counts Rankings
Ranking Based On Selection: 24
child health and paediatrc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,382
1,074
0.777
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Epidemiology
Water and Sanitation
Occupational Health
Helminthology
Modeling in Researc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,309
375
0.286
* Total Citation Counts Rankings
Rankings
103,290
27
1
Ranking Based On Selection: 1
Fabian Esamai
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,163
5,723
0.563
child health
paediatric
* Total Citation Counts Rankings
Rankings
120,168
32
2
Ranking Based On Selection: 2
Edwin Were
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,891
3,037
0.342
Maternal health
reproductive tract infection
HIV
research ethic
* Total Citation Counts Rankings
Rankings
193,633
72
3
Ranking Based On Selection: 3
S Kimaiyo|S Kimaiyo, Kimaiyo S
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,648
1,747
0.309
* Total Citation Counts Rankings
Rankings
223,559
90
4
Ranking Based On Selection: 4
Paul Wambua
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,869
1,794
0.368
Composite materials
Natural fibre composite
* Total Citation Counts Rankings
Rankings
237,780
104
5
Ranking Based On Selection: 5
Winstone Nyandiko M
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,559
1,943
0.426
Pediatric HIV
HIV Drug Resistance
Development of tools for HIV Care
Adolescent Medicine
Neonatolog
* Total Citation Counts Rankings
Rankings
250,665
121
6
Ranking Based On Selection: 6
Nancy Wanyonyi
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,304
2,124
0.493
Occupational Health
Physiotherap
* Total Citation Counts Rankings
Rankings
273,646
136
7
Ranking Based On Selection: 7
Robert Ojiambo Mangeni
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,904
2,018
0.517
* Total Citation Counts Rankings
Rankings
280,043
140
8
Ranking Based On Selection: 8
Samuel O Ayaya
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,801
1,751
0.461
adolescent HIV specifically transitioning of HIV infected children from paediatric to adult focused care
children living in especially difficult circumstances
* Total Citation Counts Rankings
Rankings
319,116
162
9
Ranking Based On Selection: 9
Lameck Diero
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,261
1,615
0.495
Internal Medicine
Chest Medicine
Health Informatic
* Total Citation Counts Rankings
Rankings
322,597
163
10
Ranking Based On Selection: 10
Isaac S. Kosgey
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,218
1,055
0.328
Animal Breeding and Genetic
Smart Institutional Plan
Powerful Insights + Smart Membership = Institutional Success
Unlock 360° Real-Time Institutional Analysis to identify your institution’s strengths and areas for improvement.
* Total Citation Counts Rankings
Rankings
340,967
177
11
Ranking Based On Selection: 11
Hillary Mabeya
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,007
1,829
0.608
Obstetrics/Gynecology
cervical cancer prevention
obstetric fistula
charity wor
* Total Citation Counts Rankings
Rankings
342,075
179
12
Ranking Based On Selection: 12
Diana Menya
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,995
2,091
0.698
Public Health
Esophageal Cancer Research
Malaria Researc
* Total Citation Counts Rankings
Rankings
351,269
188
13
Ranking Based On Selection: 13
Yashon O. Ouma
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,899
1,921
0.663
Engineering Surveying
Satellite Remote Sensing
Applied AI
Hydroinformatics
Photogrammetr
* Total Citation Counts Rankings
Rankings
376,219
209
14
Ranking Based On Selection: 14
Violet Naanyu
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,659
1,963
0.738
Bioethics
African Studies
Qualitative Research
Care Seeking Behavior
Disease Stigm
* Total Citation Counts Rankings
Rankings
414,614
246
15
Ranking Based On Selection: 15
Siagi Zo
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,339
869
0.372
Energy and the environmen
* Total Citation Counts Rankings
Rankings
435,565
270
16
Ranking Based On Selection: 16
Joseph Mamlin
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,187
314
0.144
Relationship between academic centers Healthcare care systems for under-served population
Internal medicin
* Total Citation Counts Rankings
Rankings
440,446
276
17
Ranking Based On Selection: 17
Ann Mwangi
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,153
1,349
0.627
* Total Citation Counts Rankings
Rankings
460,013
305
18
Ranking Based On Selection: 18
John K. Tarus
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,025
1,533
0.757
E-Learning
Recommender Systems
Internet of Things
Data Mining
Open Source Softwar
* Total Citation Counts Rankings
Rankings
508,396
378
19
Ranking Based On Selection: 19
Emmanuel Chessum Kipkorir
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,752
778
0.444
Water Resources Engineering
Irrigation Water Managemen
* Total Citation Counts Rankings
Rankings
517,996
393
20
Ranking Based On Selection: 20
Kirtika Patel
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,703
654
0.384
Immunology
Oncology
Biobanking and Genetic
* Total Citation Counts Rankings
Rankings
540,162
429
21
Ranking Based On Selection: 21
Jemima Hoine
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,594
1,103
0.692
Endocrinology
NCDs
implementation researc
* Total Citation Counts Rankings
Rankings
558,923
452
22
Ranking Based On Selection: 22
Damianah Kieti
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,511
540
0.357
Sustainable Tourism
community based tourism
tourism and resilience
Wildlife based tourism
Pro-poor touris
* Total Citation Counts Rankings
Rankings
568,589
463
23
Ranking Based On Selection: 23
Abraham Siika
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,469
605
0.412
* Total Citation Counts Rankings
Rankings
589,819
497
24
Ranking Based On Selection: 24
Irene Marete
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,382
1,074
0.777
child health and paediatrc
* Total Citation Counts Rankings
Rankings
609,306
532
25
Ranking Based On Selection: 25
Peter M Gatongi
Moi University
Eldoret, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,309
375
0.286
Epidemiology
Water and Sanitation
Occupational Health
Helminthology
Modeling in Researc