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Top experts by indication / Gastroenterology

Most active experts in Viral Hepatitis (B/C)

2026 edition, data as of October 26, 2026

292 key opinion leaders in the directory are tagged to Viral Hepatitis (B/C). The tables below rank them by one public measure each: registered trials, citations, NIH awards and congress contributions. Each is a count from a named source, not a judgment about the person, and every row links a profile where the count can be checked.

Most registered trials

Registered clinical trials in this indication on which the person is a listed investigator, counted from ClinicalTrials.gov. 80 of the 292 people tagged to this indication have this count on record; the 25 highest are listed. Source: ClinicalTrials.gov.

#Experttrials
1Raymond ChungMassachusetts General Hospital, MA16 trials
2Marc GhanyNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), MD14 trials
3Mitchell ShiffmanLiver Institute of Virginia, VA7 trials
4Calvin PanNYU Langone Health, NY7 trials
5Nezam AfdhalBeth Israel Deaconess Medical Center, MA7 trials
6Michael FriedUniversity of North Carolina at Chapel Hill, NC6 trials
7Anna LokUniversity of Michigan, MI6 trials
8Jun LiUniversity Hospitals Harrington Heart & Vascular Institute (Cleveland/Parma, OH); Case Western Reserve University School of Medicine, OH6 trials
9Bittoo KanwarCA5 trials
10Andrew MuirDuke University School of Medicine, NC5 trials
11Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY5 trials
12Mary BurtonMO4 trials
13Eric CohenMA4 trials
14Frederick AlticeYale School of Medicine, CT4 trials
15Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD4 trials
16Alain LitwinClemson University, NY4 trials
17Samuel HoCA3 trials
18Jenny YangCA3 trials
19Fred PoordadUniversity of Texas Health Science Center at San Antonio, TX3 trials
20Douglas DieterichIcahn School of Medicine at Mount Sinai, NY3 trials
21Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI3 trials
22Ira JacobsonNYU Langone Health, NY3 trials
23Tarek HassaneinSouthern California Liver Centers, CA3 trials
24Seung KimOH2 trials
25Timothy MorganCA2 trials

Most cited

Citations to the person's whole published record in OpenAlex, not only their work in this indication, among the people with at least two registered trials in it. 30 of the 292 people tagged to this indication have at least 2 registered trials in it and this count on record; the 25 highest are listed. Source: OpenAlex.

#Expertcitations
1Charles RiceThe Rockefeller University, WV102,342 citations
2Anna LokUniversity of Michigan, MI70,709 citations
3Mitchell ShiffmanLiver Institute of Virginia, VA54,249 citations
4Norah TerraultKeck School of Medicine of USC, CA48,598 citations
5Eric LawitzTexas Liver Institute, TX43,874 citations
6Ira JacobsonNYU Langone Health, NY41,292 citations
7Nezam AfdhalBeth Israel Deaconess Medical Center, MA37,271 citations
8Fasiha KanwalBaylor College of Medicine, TX32,551 citations
9Andrew MuirDuke University School of Medicine, NC29,275 citations
10Gregory EversonHepQuant, CO25,175 citations
11Frederick AlticeYale School of Medicine, CT23,668 citations
12Marc GhanyNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), MD23,495 citations
13Fred PoordadUniversity of Texas Health Science Center at San Antonio, TX21,517 citations
14Adeel ButtHackensack Meridian Health, NJ21,225 citations
15Tarek HassaneinSouthern California Liver Centers, CA20,620 citations
16Vinod RustgiRutgers Robert Wood Johnson Medical School, NJ19,794 citations
17Douglas DieterichIcahn School of Medicine at Mount Sinai, NY15,662 citations
18Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY9,451 citations
19Raymond ChungMassachusetts General Hospital, MA8,595 citations
20Calvin PanNYU Langone Health, NY7,877 citations
21Anne LuetkemeyerUniversity of California, San Francisco, CA7,052 citations
22Susanna NaggieDuke University School of Medicine, NC6,741 citations
23Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI6,690 citations
24Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD6,613 citations
25Alain LitwinClemson University, NY5,098 citations

Most NIH awards

NIH awards on the person's record in NIH RePORTER, across all of their funded work, among the people with at least two registered trials in this indication. 22 of the 292 people tagged to this indication have at least 2 registered trials in it and this count on record; the 22 highest are listed. Source: NIH RePORTER.

#Expertawards
1Frederick AlticeYale School of Medicine, CT28 awards
2Raymond ChungMassachusetts General Hospital, MA22 awards
3Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI16 awards
4Susanna NaggieDuke University School of Medicine, NC12 awards
5Gregory EversonHepQuant, CO10 awards
6Fasiha KanwalBaylor College of Medicine, TX10 awards
7Norah TerraultKeck School of Medicine of USC, CA9 awards
8Anna LokUniversity of Michigan, MI8 awards
9Michael FriedUniversity of North Carolina at Chapel Hill, NC7 awards
10Shivan MehtaUniversity of Pennsylvania, PA6 awards
11Nezam AfdhalBeth Israel Deaconess Medical Center, MA6 awards
12Timothy MorganCA5 awards
13Andrew MuirDuke University School of Medicine, NC5 awards
14Douglas DieterichIcahn School of Medicine at Mount Sinai, NY4 awards
15Alain LitwinClemson University, NY3 awards
16Mitchell ShiffmanLiver Institute of Virginia, VA3 awards
17Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY3 awards
18Anne LuetkemeyerUniversity of California, San Francisco, CA2 awards
19Samuel HoCA1 award
20Bittoo KanwarCA1 award
21Ira JacobsonNYU Langone Health, NY1 award
22Tarek HassaneinSouthern California Liver Centers, CA1 award

Most congress contributions

Congress abstracts and presentations attributed to the person and verified by DOI, across every meeting the directory tracks, among the people with at least two registered trials in this indication. 14 of the 292 people tagged to this indication have at least 2 registered trials in it and this count on record; the 14 highest are listed. Source: Congress abstracts, DOI-verified.

#Expertcontributions
1Anna LokUniversity of Michigan, MI8 contributions
2Charles RiceThe Rockefeller University, WV6 contributions
3Eric LawitzTexas Liver Institute, TX4 contributions
4Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD3 contributions
5Fasiha KanwalBaylor College of Medicine, TX2 contributions
6Nezam AfdhalBeth Israel Deaconess Medical Center, MA2 contributions
7Douglas DieterichIcahn School of Medicine at Mount Sinai, NY1 contribution
8Raymond ChungMassachusetts General Hospital, MA1 contribution
9Adeel ButtHackensack Meridian Health, NJ1 contribution
10Mitchell ShiffmanLiver Institute of Virginia, VA1 contribution
11Calvin PanNYU Langone Health, NY1 contribution
12Jihad SlimNew York Medical College, NJ1 contribution
13Tarek HassaneinSouthern California Liver Centers, CA1 contribution
14Norah TerraultKeck School of Medicine of USC, CA1 contribution

Emerging

8 of the 292 carry the Emerging flag: publication and trial activity rising over the recent three years, in the top ten percent for growth among specialty peers at a similar career stage. Listed A to Z, not ranked; the flag is a yes or nothing, never a score. How the flag is computed.

Alina AllenMayo Clinic, MN
Paul GaglioRutgers New Jersey Medical School, NJ
Janet HammondAtea Pharmaceuticals, CA
Chiu-Bin HsiaoAllegheny Health Network, PA
Vignan ManneUniversity of Nevada, NV
Susanna NaggieDuke University School of Medicine, NC
Onyema OgbuaguYale School of Medicine, CT
Claudia ZeinOH

How these tables are computed

The cohort is every profile in the directory tagged to Viral Hepatitis (B/C), from the person's registered trials and published research. Only indications with at least 200 tagged people get a page; a smaller cohort would say more about the tag than about the people in it. Each table sorts the cohort by one count, highest first, with no weighting, no blending and no editorial pass. Ties are broken by the profile's stable internal id so the same counts always give the same order. A person with no count on record is left out of that table, not ranked last.

Citations, NIH awards and congress contributions are counts over a person's whole record, not their work in this indication alone, so those three tables are limited to the indication's investigators: people with at least 2 registered trials in it. Without that rule the most cited people in a cohort are the ones whose careers span many diseases, which is a fact about their careers, not about this field. The registered-trials table is the indication-scoped count itself and has no such limit.

The counts are recomputed on every publish and the page carries the date of the publish it was built from. Previous editions are superseded, not archived.

What is deliberately absent

Reported industry payments are on every profile but are not a table here: a count of payers is a fact, and ranking people by it reads as a judgment. Prescribing volume is part of the paid workspace. The directory's influence tier is a judgment and never orders a public page. Sources and methodology.

Filter, sort and open every Viral Hepatitis (B/C) profile in the directory