Faculty and Staff
Mark Sulkowski, MD, Professor of Medicine, is the Medical Director of the Viral Hepatitis Center and Associate Dean for Research in the Capital Region. He received his M.D. from the Temple University School of Medicine in 1992. He completed his residency at the Duke University School of Medicine and performed a fellowship in infectious diseases in 1998 at Johns Hopkins.
He is a member of numerous professional societies, including the American Association for the Study of Liver Diseases, the European Association for the Study of the Liver and the Infectious Diseases Society of America. He is also an elected member of the American Society for Clinical Investigation (ASCI).
Dr. Sulkowski is widely published, with works in Annals Internal Medicine, Nature, New England Journal of Medicine, Journal of the American Medical Association, Journal of Infectious Diseases and Hepatology. As an invited lecturer, he has presented discussions of the management of viral hepatitis at numerous major national and international medical meetings. Dr. Sulkowski sees outpatients at the John G. Bartlett Specialty Practice and the Rockland Physician Practice at Greenspring Station. In addition, he provides consultation via the telemedicine program.
Justin Bailey, MD, PhD, Associate Professor of Medicine, received his MD and PhD degrees from the Johns Hopkins University School of Medicine through the Medical Scientist Training Program and completed medical residency at the Massachusetts General Hospital. He subsequently completed fellowship training in Infectious Diseases at the Johns Hopkins University School of Medicine before transitioning to a faculty position. His primary clinical interest is management and treatment of viral hepatitis, including hepatitis c virus. His research interests include the study of immune responses against hepatitis c virus, particularly neutralizing antibody responses, with the goal of guiding vaccine development against the virus. Dr. Bailey sees outpatients at the John G. Bartlett Specialty Practice.
Ashwin Balagopal, MD, Associate Professor of Medicine, received his medical degree from Mount Sinai School of Medicine, Dr. Balagopal completed his residency in internal medicine at Yale-New Haven Hospital. He performed his fellowship in infectious diseases at the Johns Hopkins University School of Medicine.
Dr. Balagopal’s research interests include microbial translocation and Kupffer cells in HIV-HCV coinfection and in situ liver studies of HIV-HCV pathogenesis. Dr. Balagopal sees outpatients at the John G. Bartlett Specialty Practice.
Sherilyn Brinkley, MSN, CRNP
Sherilyn Brinkley, MSN, CRNP, Nurse Practitioner Manager, is the Program Manager of Clinical Services and Research for the Viral Hepatitis Center. Ms Brinkley earned her masters of science in nursing in 1998 (with an adult nurse practitioner concentration) and her bachelor of science in nursing from the Johns Hopkins University School of Nursing. She is a licensed Nurse Practitioner in Maryland and a board-certified Adult Nurse Practitioner by the American Nurses Credentialing Center. Ms Brinkley has clinical expertise in the care of persons with hepatitis B, hepatitis C and HIV co-infections. She has over twenty years of direct patient care and research experience working to eradicate hepatitis C.
Ms Brinkley was the recipient of the 1st Annual Miller-Coulson Nurse Practitioner Clinical Excellence Award presented by the Miller-Coulson Academy of Clinical Excellence at the Johns Hopkins Center for Innovative Medicine in 2015. She received the 2012 Hepatitis Hero Award, presented by the Maryland Hepatitis Coalition. She is the author or coauthor of abstracts and publications in the field of viral hepatitis and has presented on the management and delivery of viral hepatitis clinical care at national medical meetings. Ms. Brinkley sees outpatients at the John G. Bartlett Specialty Practice and the Johns Hopkins Bayview Medical Center. In addition, she provides consultation via the telemedicine program.
Andrea Cox, MD, PhD, is a Professor of Medicine, Oncology, Molecular Microbiology & Immunology. Dr. Cox is an internationally recognized leader in studies of the host immune response to chronic viral infections, including HIV, hepatitis B and hepatitis C (HCV). Dr. Cox serves as the director of the Medical Scientist Training Program.
Dr. Cox earned her Ph.D. in chemistry from the University of Virginia, where she worked on the characterization of peptide T cell antigens. She then earned her M.D. and completed internal medicine residency and infectious disease fellowship training at Johns Hopkins.
She leads the largest prospective cohort study of acute HCV infection designed to enable detailed molecular analysis of HCV transmission, host immune responses and virus sequence evolution. She is the principal investigator on the first prophylactic HCV vaccine trial in individuals at risk of HCV infection. In addition to her research on chronic viral infections, Dr. Cox is actively involved in clinical care of patients with HCV, HIV and hepatitis B infection.
A teacher, advisor and mentor of physician-scientists, Dr. Cox is a faculty member in the cellular and molecular medicine and the immunology graduate programs at the School of Medicine. Dr. Cox also serves as the faculty advisor for the Association of Women Student MD-PhDs. Dr. Cox sees outpatients at the Rockland Physician Practice at Greenspring Station.
Michael Chattergoon, MD, PhD, Assistant Professor of Medicine, received his MD and PhD degrees from the University of Pennsylvania, School of Medicine through the Medical Scientist Training Program and completed medical residency at the Hospital of the University of Pennsylvania. He completed fellowship training in Infectious Diseases at the Johns Hopkins University School of Medicine before transitioning to a faculty position. His primary clinical interest is management and treatment of viral hepatitis and HIV. His research interests include the study of innate immune system responses against chronic viral infections including hepatitis C virus, hepatitis B and HIV. Dr. Chattergoon sees outpatients at the John G. Bartlett Specialty Practice.
Oluwaseun Falade-Nwulia, MBBS (MD), MPH, Assistant Professor of Medicine, earned her M.B.B.S. (MD) from the University of Ibadan Medical School College of Medicine. She completed her residency at Johns Hopkins Bayview Medical Center. She performed fellowships in infectious diseases at Johns Hopkins and a fellowship in critical care medicine at the National Institutes of Health. Dr. Falade-Nwulia sees outpatients at the John G. Bartlett Specialty Practice.
Taryn Haselhuhn, MSN, CRNP
Taryn Haselhuhn, MSN, CRNP, Nurse Practitioner, sees outpatients at the John G. Bartlett Specialty Practice.
Risha Irvin, MD, MPH, Assistant Professor of Medicine, earned her M.D. at Harvard Medical School and her MPH from the Harvard School of Public Health. She completed her residency at the University of California San Francisco in the San Francisco General Primary Care Based Program. Dr. Irvin then worked as an HIV research fellow at the San Francisco Department of Public Health and as an HIV Prevention Trials Network Scholar. Dr. Irvin serves as the Program Director of Generation Tomorrow at the Center for AIDS Research at Johns Hopkins. She also directs Sharing the Cure which trains primary care clinicians to treat hepatitis C. Dr. Irvin’s research interest include conducting research focused on examining the impact of alcohol, drug use, and other social determinants of health on the HIV and HCV care continuums and developing multi-component patient-centered interventions to address impediments along the care continuums. Dr. Irvin is also a 2018 Presidential Leadership Scholar. Dr. Irvin sees outpatients at the John G. Bartlett Specialty Practice.
Julie McArthur, MS, CRNP
Julie McArthur, MS, CRNP, Senior Adult Nurse Practitioner, received her Master’s Degree (with an adult nurse practitioner concentration) in 1996 from the University of Maryland at Baltimore. She received her undergraduate degree in Nursing from the College of Notre Dame in Baltimore Maryland. She started working in the field of HIV in 1986, initially in a nursing research role for the MACS cohort, a large multicenter natural history study of HIV infection, and then as a nurse research coordinator for clinical trials at Chase-Brexton Health Services (CHBS). After becoming a nurse practitioner, she continued her work at CBHS, providing care for patients with HIV, Hepatitis B, and Hepatitis C. She then came to Johns Hopkins University, conducting clinical research. She currently works in the Bartlett Specialty clinic and is directly responsible for the medical care of patients with HIV and Hepatitis co-infection.
She has lectured regularly on the management of Hepatitis C in CME activities. She serves as a clinical preceptor for the AIDS Education Training Center for the education of Nurse Practitioner and Physician’s Assistants on the evaluation and management of Hepatitis B and C. She also is a preceptor for the Combined Internal Medicine-Pediatrics Urban Heath Residency Program. Ms. McArthur sees outpatients at the John G. Bartlett Specialty Practice.
Noah McKittrick, MD, Clinical Associate earned his MD from the University of Pennsylvania, School of Medicine. He completed his residency in internal medicine at Thomas Jefferson University Hospital and performed an infectious diseases fellowship at Stanford University School of Medicine.
Dr. McKittrick received the Annals of Internal Medicine Young Investigator Award, American College of Physicians in 2014 and was recognized by the Infectious Diseases Society of America (IDSA) with an ID Week Travel Award in 2016. Dr. McKittrick sees outpatients at the Johns Hopkins Bayview Medical Center and provides consultation via the telemedicine program.
Juhi Moon, MD, Clinical Associate, earned her MD at the Ross University School of Medicine in 2009, followed by a residency at the Allegheny General Hospital in 2013. Her infectious diseases fellowship was completed at the Penn State Milton S. Hershey Medical Center in 2015.
Dr. Moon is involved in several clinical research studies to eradicate hepatitis C. She is the author or coauthor of abstracts and publications in the field of viral hepatitis. Dr. Moon sees outpatients with hepatitis B and hepatitis C in the John G. Bartlett Specialty Clinic.
Stuart Ray, MD, Professor of Medicine, Oncology, and Health Sciences Informatics, is the Director of the Virology Research Laboratory for the Viral Hepatitis Center; Vice Chair of Medicine for Data Integrity and Analytics; Member of the Janeway Firm Faculty of the Osler Medical Residency Program; and is Scientific Director of the JHU Laboratory for Integrated NanoDiagnostics.
Dr. Ray received his MD from Vanderbilt University School of Medicine in 1990. After an internship and residency at Johns Hopkins Hospital, he continued there as an Assistant Chief of Service and fellow in Infectious Diseases. During his fellowship, he studied the immunology and sequence variation of HIV in the laboratory of Dr. Robert Bollinger. During that time, he developed an interest in HIV sequence variation during antiretroviral therapy in a productive collaboration with Dr. Robert Siliciano that continues to the present.
In 1997, Dr. Ray joined the Johns Hopkins faculty, and under the mentorship of Dr. David Thomas shifted his primary research focus to hepatitis C virus (HCV). His laboratory work has focused on the sequence variation of HCV during acute and chronic infection, developing and applying computational and molecular biology tools to underlying mechanisms including stochastic variation, immune selection, and viral fitness. He continues to care for patients with HIV, HCV, and other infectious diseases. Dr. Ray provides inpatient clinical care.
Chloe Thio, MD, Professor of Medicine, Associate Professor of Molecular Microbiology & Immunology, received her B.A. from the University of Pennsylvania. She earned her M.D. from the Yale University School of Medicine. She completed her residency at Hospital of the University of Pennsylvania and performed a fellowship in infectious diseases at Johns Hopkins.
Her research interests include hepatitis and HIV/AIDS. Her recent research revealed that certain HIV drugs provide added benefit of protecting against hepatitis B.
Dr. Thio serves on the Research Compensation Subcommittee for the Department of Medicine. She is a member of the American College of Physicians, the American Association for the Study of Liver Disease, the American Society of Clinical Investigation, HIVMA and the Infectious Diseases Society of America. Dr. Thio sees outpatients at the John G. Bartlett Specialty Practice.
David Thomas, MD, Stanhope Bayne-Jones Professor of Medicine, Professor of Epidemiology, is the Director of the Division of Infectious Diseases and Co-Director of the Center for AIDS Research Clinical Core.
Dr. Thomas earned his undergraduate degree in chemistry, in 1982, and his medical degree, in 1986, from West Virginia University. He then completed his medical training and residency at Wake Forest University in North Carolina, before coming to Johns Hopkins as a research fellow in infectious diseases. He went on to earn his Master of Public Health at the Johns Hopkins Bloomberg School of Public Health. He joined the faculty at the School of Medicine in 1993 and Public Health in 1994.
From 2005 to 2006, he served as director of research at the Infectious Diseases Institute in Kampala, Uganda. The institute provides free medical and social services for HIV-1-infected Ugandans and training for physicians and nurses from across sub-Saharan Africa.
For his commitment to translating medical research into advances in the care of people living with both hepatitis C and HIV, the American Society of Clinical Investigation named Dr. Thomas to its honor list of physician-scientists in 2001. Dr. Thomas sees outpatients at the John G. Bartlett Specialty Practice and provides consultation via the telemedicine program.
Patricia Tichnell, RN
Patricia Tichnell, RN, Senior Clinical Nurse is the Western Region Telemedicine Program Manager. Ms. Tichnell graduated from Allegany College in 1981. She has 23 years of public health nursing experience and 10 years in infectious disease work including HIV.
She is the Nurse Case Manager for the viral hepatitis telemedicine program located at the Allegany County Health Department in Cumberland, Maryland. She provides comprehensive screening, linkage to care and treatment services to persons living with hepatitis C in the western Maryland region.