Meet the HIV team


Nada Fadul, MD, is an Assistant Dean and Professor of Medicine at the Division of Infectious Diseases, University of Nebraska Medical Center (UNMC). She is the Medical Director of the UNMC’s Specialty Care Center and the Principal Investigator of the Ryan White Parts C&D grants. She completed her medical degree from the University of Khartoum-Faculty of Medicine in Sudan and subsequently completed her training in the US. She has published in peer-reviewed journals, authored and coauthored several abstracts and book chapters, presented her research at national and international meetings, and mentored several students and trainees. She served on the Leadership Development and the Awards Committees of the national HIV Medical Association, serves as an Infectious Diseases Society of America (IDSA) advocacy liaison, and was chosen to join the inaugural IDSA Leadership Institute. Dr. Fadul’s main interests are: the management, quality of life issues and health disparities in people living with HIV/AIDS.

Sara Hurtado Bares, MD, joined the HIV/Infectious Diseases team in July 2013. After receiving her undergraduate degree from Amherst College, Dr. Bares obtained her M.D. from Mount Sinai School of Medicine in New York City. She trained in Internal Medicine at the University of Chicago where she was an intern, resident, and chief resident. Following her residency, Dr. Bares stayed on at the University of Chicago to complete a fellowship in Infectious Diseases. Her clinical and research interests include HIV prevention and treatment, HIV in women, and HIV in pregnancy.

Jasmine Riviere Marcelin, MD, joined the HIV/Infectious Diseases team in September 2017. She is currently an Associate Professor of Medicine, Associate Medical Director of Antimicrobial Stewardship, and Associate Program Director of the UNMC Internal Medicine Residency.  A Caribbean native born in Dominica and raised in Antigua & Barbuda, she received her MD degree from American University of Antigua College of Medicine. She subsequently went on to postgraduate training at Mayo Clinic in Rochester, Minnesota, where she was an Internal Medicine Resident, Infectious Diseases Fellow and Infectious Diseases Chief Fellow. She has published several HIV-related articles including a book chapter on renal manifestations of HIV and viral hepatitis, and led a quality improvement project to improve universal HIV screening in primary care clinics. She is passionate about justice, equity, diversity and inclusion education in healthcare, including teaching trainees and creating educational materials for healthcare professionals and patients.



Josh Havens, PharmD, graduated from the University of Nebraska Medical Center-College of Pharmacy in 2007. He previously worked at Nebraska Medicine in the outpatient pharmacy and the Internal Medicine clinic. He joined the HIV/Infectious Diseases group in 2015 and the Department of Pharmacy Practice in 2019. As a pharmacy clinician at the Specialty Care Center, he provides care for people living with HIV including antiretroviral therapy initiation and revision as well as various other management services together with primary care services. Additionally, he operates a pharmacist-led HIV prevention program offering HIV pre- and post-exposure prophylaxis. He provides lectures for the College of Pharmacy and precepts fourth year students and pharmacy residents annually and is involved in various research protocols.   

Valentina Orduna, CMA, CPhT, joined the HIV/Infectious Diseases team in May 2017. She previously worked for Nebraska Medicine for 16 years. At Nebraska Medicine, she started as a Pharmacy Technician for 10 years, three years as a Pharmacy Financial Counselor, and three years at the Peggy Cowdery Clinic as a New Patient Coordinator. Valentina is bilingual in Spanish and English. She is devoted and passionate about assisting in the medical field and helping the community.

Nurse Practitioners

Daniel Cramer, APRN, MSN, joined the HIV team in November of 2020. He attended the University of Nebraska Medical Center, earning a Bachelor of Science in Nursing degree in 2014 and a Master of Science in Nursing degree in 2018. He previously worked as a Nurse Practitioner for Nebraska Medicine in the Infectious Diseases Division specializing in orthopedic and general infectious diseases. Dan is currently pursuing his DNP, researching stigma affecting health outcomes in individuals living with HIV. He has been an adjunct faculty member at UNMC since 2019. Dan is on the Nebraska Infectious Disease Society Board of Governors and is involved in volunteering with GLMA [Health Professionals Advancing LGBTQ Equality (previously known as the Gay & Lesbian Medical Association which is the world's largest and oldest association of lesbian, gay, bisexual, transgender and queer (LGBTQ) healthcare professionals].

Nikki Regan, APRN, MSN, joined the HIV team in July 2015. She attended the University of Nebraska Medical Center, earning a Bachelor of Science in Nursing degree in 2004, and a Master of Science in Nursing degree in 2011. She completed the MATEC HIV Clinical Scholars Program in 2016. Since 2020, she has served as the Nebraska HIV Program Coordinator for the KS/NE Midwest AIDS Training + Education Center (MATEC). She also serves as the Ryan White Program Quality Improvement Manager and is a participant in the UNMC Infectious Diseases Health Equity and Quality Improvement ECHO (Extension for Community Healthcare Outcomes) Collaborative. Nikki has volunteered with Project Kindle, an organization that serves children and teens impacted by HIV/AIDS by providing summer camp experiences as well as year-long activities and support for their families. She is also a Nebraska Medicine LiveGreen Ambassador, promoting environmental responsibility and sustainability on the UNMC and Nebraska Medicine campus.

Christine D. Tran, DNP, APRN, joined the HIV program in October 2010. She previously worked at Midwest Gastrointestinal Associates as a nurse practitioner, from 2007 to 2010. She received her BSN from Marquette University in May 2000, her MSN from Creighton University in May 2006, and her DNP from the University of Nebraska Medical Center in May 2015. She was a volunteer at the Nebraska AIDS Project for five years doing outreach HIV testing. Christine plays a role as clinical care provider, educator, and is involved in clinical research. She is committed to working with her patients as a member of a dedicated team in order to provide quality care.

Registered Nurses

Daniel Cobos, RN, BSN, MPH, was recruited to UNMC in 1996 as a study coordinator. After various roles at the SCC, Daniel currently holds the position of Nurse Case Manager for our program. A major part of his role is to insure patients remain in care and to facilitate patient visits. He is bilingual in Spanish and English and well respected in the Latinx community. A volunteer at NAP for more than 20 years and at One World (formerly Indian-Chicano Health Center) for 7 years, he is very committed to his work and to our patients. Daniel also serves on various nurse councils at Nebraska Medicine. In 2022, he was nominated for the Extraordinary Nurse of the year at Nebraska Medicine.

Precious Davis, EdD, MSN, RN, in May 2022 completed her doctoral studies at Clarkson College in Healthcare Leadership and Education and has a Master’s degree in Nursing Education. She currently is working per diem as a Subject Matter Expert in UNMC's ID Health Equity and Quality Improvement ECHO (Extension for Community Healthcare Outcomes) collaborative and works casually with individuals with developmental disabilities at Union for Helping Support. Precious has been a Nurse Case Manager at Nebraska Medicine in Infectious Diseases since 2017 and was a floor nurse on at the Lied Transplant Center prior to her current role. Precious is also involved in multiple employee resource groups (ERGs) on campus such as RISE Women, African American Black Alliance, and is the Community Engagement Chair for the Black Student Union (BSU), in which she is a founding member at Clarkson College. Community and public health is her passion along with educating on health disparities, cultural health, and motivational interviewing.

Clinic Manager

Kevin Borges, BSN, RN, joined the HIV team in September of 2021 as the Clinic Manager. Kevin graduated from Creighton University in 2012 with a BSN.  Prior to joining Nebraska Medicine in his current role, he worked in the hospital splitting his time between the inpatient floors and the Emergency Department. Kevin’s responsibilities include overseeing the HIV clinic as well as managing the outpatient infectious disease services for Nebraska Medicine.

Medical Assistants

Susan Dermer, MA, is a Certified Medical Assistant and joined the HIV Team in October 2021. Susie has been in healthcare for over 30 years and has worked in both hospital and clinical settings. She works as a clinic clerk/medical assistant and provides support in the clinic with rooming and general support. She has experience in phlebotomy, performing point of care testing and giving injections.

Adele Haas, MA, is a Certified Medical Assistant and has been with Nebraska Medicine for 40 years. She joined the HIV Team in May 2010. She works as a clinic clerk/medical assistant and assists with phlebotomy.


Grace Bradford joined the HIV/Infectious Diseases team in May 2021. She started as a phlebotomist at Grifols Biomat in Council Bluffs, IA for 3 years, then worked at Davita Dialysis in Omaha, NE for a year, before working as a phlebotomist at the Bellevue Medical Center in 2019. Grace has a deep love for healthcare and the desire to provide quality, compassionate care to all of the patients.

Research Coordinators

Renae Furl, MPH, has rejoined the HIV team in January 2021 as a clinical study coordinator with the research team. She received her Master’s degree in Public Health from the University of Nebraska Medical Center. Previously, Renae has 17 years’ experience working with Nebraska’s HIV Ryan White Programs at UNMC, the Nebraska AIDS Project, and the Nebraska Department of Public Health. In 2020, Renae worked as a Regulatory Coordinator for the UNMC Clinical Research Center.

Maureen Kubat, RN, BSN, BSW, received her Bachelor of Social Work from Marquette University in 2000 and her Bachelor of Science in Nursing from Creighton University in 2005. After working as a nurse in acute care and pediatrics, she joined the HIV team in October 2016 as a research study coordinator. She enjoys working with both the research and clinical aspects of patient care, and is committed to the health and well-being of our patients.

Jennifer O’Neill, RN, BSN, attended the University of Nebraska-Lincoln for 2-1/2 years and then received her BSN from the University of Nebraska Medical Center-Kearney Campus in May of 2000. She has been in Omaha since August of 2000, working primarily in pediatrics until joining the HIV team as Patient Care Coordinator on the HIV Clinic in June of 2003. Jen is a clinical research study coordinator and is a real patient advocate.

Client Services Team

Renee Bera ADCJ, joined the HIV team in August 2018 as the Healthcare Access Liaison. She spent the last ten years in skilled nursing and rehabilitation as a Business Office Manager and Provisional Administrator. She currently works with the Ryan White Part C & D Program. She helps patients with access and maintain insurance coverage Medicaid.

Rachelle Carr began her career with Nebraska Medicine May 2004, joining the HIV team November 2007 as a Medical Assistant and has transitioned as a Patient Outreach Liaison role within UNMC in March 2021. Rachelle is devoted to assisting vulnerable patients, along with being an advocate/ally, she maintains communication with those to improve their overall healthcare.

Samantha L. Jones, CSW, joined the University of Nebraska Medical Center HIV team in May of 2016. She received her BSW from the University of Iowa in 2010 and has worked for several federal grants focusing on child welfare, reentry, education, employment and training. Prior to joining the HIV team, she worked under the federal Workforce Innovation and Opportunity Act (WIOA), providing outreach and access to employment and training opportunities in order to assist individuals in becoming self-sufficient. Samantha currently serves as the Patient Access Program Manager overseeing the UNMC Specialty Care Center’s Medical Case Management program. She is currently pursuing her Master’s in Social Work at University of Nebraska Omaha.

Laura Krajewski, MPA, joined the HIV team in 2013 as the Patient Outreach Specialist. She assesses and schedules patients new to the HIV clinic and also reaches out to patients who have fallen out of care. She helps with various aspects of the UNMC Ryan White Part C and D program and works closely with the Positive Action Consumer (PAC) group, a group which provides insight to improving Ryan White program services. Previously, Laura worked at an AIDS Service Organization in Massachusetts for eight years and served in the Peace Corps in Kazakhstan teaching English to high school students.

Tacy Slater, MSW, MPH, joined the HIV team in 1999. She was employed as a case manager with the Nebraska AIDS Project for five years and as a volunteer for 3 years. She received her Master’s degree in Social Work and Public Administration from the University of Nebraska at Omaha. Tacy is a clinic social worker, patient services coordinator and the coordinator for the UNMC Ryan White Parts C and D Programs. She works with the UNMC medical students, HIV Medicine track medical students, pharmacy students and provides practicum supervision for undergraduate social work students. Tacy has committed nearly 30 years to serving, advocating and empowering individuals living with HIV so that they may meet their needs and goals for improved health outcomes.

Data Manager

Monica Arroyo, BSW, received her Bachelor’s degree in Social Work from the University of Nebraska-Kearney in 2014. She has spent the last 7 years working in the HIV field. Monica joined the UNMC HIV team in September 2018 as the Patient Eligibility Associate. Monica is currently the Data Manager for the Ryan White Program. She is strongly committed to ensuring patient access to quality healthcare.

Front Desk

Sue Allen, Medical Receptionist, joined the Specialty Care Center team April 2022. She has enjoyed working for Nebraska Medicine for the past 16 years. She has been a Medical Receptionist for about 9 years, and she enjoys getting to know the patients and their families.

Administrative Staff

Deanna Hansen has provided support as an Administrative Assistant to the UNMC HIV Program since 1992 and has been at UNMC since 1990. She received her Bachelor of Science degree in Business Administration in 1986. Her responsibilities include correspondence, meeting scheduling, preparation of reports, grant and manuscript submissions, travel arrangements, and assisting the HIV Team.

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