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.
| # | Expert | trials |
|---|---|---|
| 1 | Raymond ChungMassachusetts General Hospital, MA | 16 trials |
| 2 | Marc GhanyNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), MD | 14 trials |
| 3 | Mitchell ShiffmanLiver Institute of Virginia, VA | 7 trials |
| 4 | Calvin PanNYU Langone Health, NY | 7 trials |
| 5 | Nezam AfdhalBeth Israel Deaconess Medical Center, MA | 7 trials |
| 6 | Michael FriedUniversity of North Carolina at Chapel Hill, NC | 6 trials |
| 7 | Anna LokUniversity of Michigan, MI | 6 trials |
| 8 | Jun LiUniversity Hospitals Harrington Heart & Vascular Institute (Cleveland/Parma, OH); Case Western Reserve University School of Medicine, OH | 6 trials |
| 9 | Bittoo KanwarCA | 5 trials |
| 10 | Andrew MuirDuke University School of Medicine, NC | 5 trials |
| 11 | Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY | 5 trials |
| 12 | Mary BurtonMO | 4 trials |
| 13 | Eric CohenMA | 4 trials |
| 14 | Frederick AlticeYale School of Medicine, CT | 4 trials |
| 15 | Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD | 4 trials |
| 16 | Alain LitwinClemson University, NY | 4 trials |
| 17 | Samuel HoCA | 3 trials |
| 18 | Jenny YangCA | 3 trials |
| 19 | Fred PoordadUniversity of Texas Health Science Center at San Antonio, TX | 3 trials |
| 20 | Douglas DieterichIcahn School of Medicine at Mount Sinai, NY | 3 trials |
| 21 | Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI | 3 trials |
| 22 | Ira JacobsonNYU Langone Health, NY | 3 trials |
| 23 | Tarek HassaneinSouthern California Liver Centers, CA | 3 trials |
| 24 | Seung KimOH | 2 trials |
| 25 | Timothy MorganCA | 2 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.
| # | Expert | citations |
|---|---|---|
| 1 | Charles RiceThe Rockefeller University, WV | 102,342 citations |
| 2 | Anna LokUniversity of Michigan, MI | 70,709 citations |
| 3 | Mitchell ShiffmanLiver Institute of Virginia, VA | 54,249 citations |
| 4 | Norah TerraultKeck School of Medicine of USC, CA | 48,598 citations |
| 5 | Eric LawitzTexas Liver Institute, TX | 43,874 citations |
| 6 | Ira JacobsonNYU Langone Health, NY | 41,292 citations |
| 7 | Nezam AfdhalBeth Israel Deaconess Medical Center, MA | 37,271 citations |
| 8 | Fasiha KanwalBaylor College of Medicine, TX | 32,551 citations |
| 9 | Andrew MuirDuke University School of Medicine, NC | 29,275 citations |
| 10 | Gregory EversonHepQuant, CO | 25,175 citations |
| 11 | Frederick AlticeYale School of Medicine, CT | 23,668 citations |
| 12 | Marc GhanyNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), MD | 23,495 citations |
| 13 | Fred PoordadUniversity of Texas Health Science Center at San Antonio, TX | 21,517 citations |
| 14 | Adeel ButtHackensack Meridian Health, NJ | 21,225 citations |
| 15 | Tarek HassaneinSouthern California Liver Centers, CA | 20,620 citations |
| 16 | Vinod RustgiRutgers Robert Wood Johnson Medical School, NJ | 19,794 citations |
| 17 | Douglas DieterichIcahn School of Medicine at Mount Sinai, NY | 15,662 citations |
| 18 | Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY | 9,451 citations |
| 19 | Raymond ChungMassachusetts General Hospital, MA | 8,595 citations |
| 20 | Calvin PanNYU Langone Health, NY | 7,877 citations |
| 21 | Anne LuetkemeyerUniversity of California, San Francisco, CA | 7,052 citations |
| 22 | Susanna NaggieDuke University School of Medicine, NC | 6,741 citations |
| 23 | Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI | 6,690 citations |
| 24 | Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD | 6,613 citations |
| 25 | Alain LitwinClemson University, NY | 5,098 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.
| # | Expert | awards |
|---|---|---|
| 1 | Frederick AlticeYale School of Medicine, CT | 28 awards |
| 2 | Raymond ChungMassachusetts General Hospital, MA | 22 awards |
| 3 | Cecilia ShikumaUniversity of Hawaiʻi at Mānoa, HI | 16 awards |
| 4 | Susanna NaggieDuke University School of Medicine, NC | 12 awards |
| 5 | Gregory EversonHepQuant, CO | 10 awards |
| 6 | Fasiha KanwalBaylor College of Medicine, TX | 10 awards |
| 7 | Norah TerraultKeck School of Medicine of USC, CA | 9 awards |
| 8 | Anna LokUniversity of Michigan, MI | 8 awards |
| 9 | Michael FriedUniversity of North Carolina at Chapel Hill, NC | 7 awards |
| 10 | Shivan MehtaUniversity of Pennsylvania, PA | 6 awards |
| 11 | Nezam AfdhalBeth Israel Deaconess Medical Center, MA | 6 awards |
| 12 | Timothy MorganCA | 5 awards |
| 13 | Andrew MuirDuke University School of Medicine, NC | 5 awards |
| 14 | Douglas DieterichIcahn School of Medicine at Mount Sinai, NY | 4 awards |
| 15 | Alain LitwinClemson University, NY | 3 awards |
| 16 | Mitchell ShiffmanLiver Institute of Virginia, VA | 3 awards |
| 17 | Andrew TalalJacobs School of Medicine and Biomedical Sciences, NY | 3 awards |
| 18 | Anne LuetkemeyerUniversity of California, San Francisco, CA | 2 awards |
| 19 | Samuel HoCA | 1 award |
| 20 | Bittoo KanwarCA | 1 award |
| 21 | Ira JacobsonNYU Langone Health, NY | 1 award |
| 22 | Tarek HassaneinSouthern California Liver Centers, CA | 1 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.
| # | Expert | contributions |
|---|---|---|
| 1 | Anna LokUniversity of Michigan, MI | 8 contributions |
| 2 | Charles RiceThe Rockefeller University, WV | 6 contributions |
| 3 | Eric LawitzTexas Liver Institute, TX | 4 contributions |
| 4 | Yaron RotmanNational Institute of Diabetes and Digestive and Kidney Diseases, MD | 3 contributions |
| 5 | Fasiha KanwalBaylor College of Medicine, TX | 2 contributions |
| 6 | Nezam AfdhalBeth Israel Deaconess Medical Center, MA | 2 contributions |
| 7 | Douglas DieterichIcahn School of Medicine at Mount Sinai, NY | 1 contribution |
| 8 | Raymond ChungMassachusetts General Hospital, MA | 1 contribution |
| 9 | Adeel ButtHackensack Meridian Health, NJ | 1 contribution |
| 10 | Mitchell ShiffmanLiver Institute of Virginia, VA | 1 contribution |
| 11 | Calvin PanNYU Langone Health, NY | 1 contribution |
| 12 | Jihad SlimNew York Medical College, NJ | 1 contribution |
| 13 | Tarek HassaneinSouthern California Liver Centers, CA | 1 contribution |
| 14 | Norah TerraultKeck School of Medicine of USC, CA | 1 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