Internal Medicine
Cardiology & Pulmonology
Our Internal Medicine physicians are trained to prevent, diagnose and treat illnesses and diseases that affect adults, age 18 and older. UNLV Health features three different internal medicine locations. This location specializes in Pulmonology (respiratory system), and Cardiology (heart).
Diabetes & Endocrinology
Our endocrinologists can diagnose and manage disorders of the endocrine system. Backed by training and compassion, our team provides a patient-focused environment while providing high-quality care.
Gastroenterology
Our gastroenterologist is a leader in the field, using the latest treatments and technology to ensure that your needs are addressed.
Neurology
The UNLV Health Neurology clinic includes neurologists highly trained to recognize, diagnose, and address the early symptoms of nerve dysfunction in patients. Because of our clinical experience treating a variety of neurological problems we are able to work with patients to establish the cause of symptoms and prescribe effective courses of treatment.
Primary Care
UNLV Health physicians treat your health and wellbeing as their top priority. Our physicians are committed to providing exceptional care in an academic environment.
Residents & Fellows
UNLV Health provides the highest quality academic medical care for the Las Vegas Community.
Rheumatology
Our rheumatology practice encompasses all aspects of rheumatology. The population we service is highly diverse, with significant numbers of patients of Native American/Hispanic, Pacific Islander, and Asian as well as African ancestry. Particular clinical and research interests focus on disorders prevalent or serve muscle and lung disease, and patients requiring management of autoimmune disorders overlapping with rheumatoid arthritis, psoriatic arthritis, or axial spondylitis. Patients are seen in the UNLV Health Internal Medicine Clinics; we also attend to hospitalized patients at University Medical Center of Southern Nevada needing inpatient rheumatology consultation.
Cardiology & Pulmonology
Click on the map for directions to UNLV Health Cardiology & Pulmonology Clinic from Google Maps
- Call Us: 702-485-4400
- Parking: Free parking is available in our parking lot. No street parking is available at this location.
- Click here to see the homepage of this clinic
Diabetes & Endocrinology
Click on the map for directions to UNLV Health Diabetes & Endocrinology Clinic from Google Maps
- Call Us: 702-671-6469
- Parking: Free parking is available in our parking lot. No street parking is available at this location.
- Click here to see the homepage of this clinic
Gastroenterology
Click on the map for directions to UNLV Health Gastroenterology & Rheumatology Clinic from Google Maps
- Call Us: 702-671-5070
- Parking: Free parking is available in our parking lot. No street parking is available at this location.
- Click here to see the homepage of this clinic
Neurology
Click on the map for directions to UNLV Health Neurology Clinic from Google Maps
- Call Us: 702-790-2255
- Parking: Free parking is available in our parking lot. No street parking is available at this location.
- Click here to see the homepage of this clinic
Residents & Fellows
Click on the map for directions to UNLV Health Internal Medicine Primary Residents & Fellows Clinic from Google Maps
- Call Us: 702-676-3650
- Parking: Free parking is available in our parking lot. No street parking is available at this location.
- Click here to see the homepage of this clinic
Jose Aponte-Pieras, MD
Internal Medicine, Gastroenterology
Jose Aponte-Pieras, MD, completed his internal medicine residency at the University of Massachusetts Medical School and went on to complete his gastroenterology and hepatology fellowship at the Kirk Kerkorian School of Medicine at UNLV where he served as chief fellow. Dr. Aponte-Pieras’s research has been published in numerous journals including American Journal of Case Reports, Cancer Letters, and ACG Case Reports Journal.
Heather Boaky-Wenzel, MD
Internal Medicine, Pulmonology
Heather Boakye-Wenzel, MD, assistant professor of internal medicine, grew up in Dallas-Ft. Worth, Texas, and graduated from the University of Texas at El Paso (UTEP) with a degree in biology. While at UTEP, she competed as a Division I soccer student-athlete.
Amber Champion, MD
Internal Medicine, Endocrinology
Dr. Amber Champion is originally from Washington state, but has practiced in Baltimore and Nebraska prior to joining the Kirk Kerkorian School of Medicine at UNLV. She graduated from The Flinders University School of Medicine of South Australia in 2005. She completed Internal Medicine Residency in Spokane, WA, and Endocrinology fellowship at the University of Arizona in Tucson.
Winn Chatham, MD
Internal Medicine, Rheumatology
Dr. Chatham, Professor of Internal Medicine at the Kerkorian School of Medicine at UNLV graduated from Duke University with a degree in Biomedical Engineering and received his medical doctorate from Vanderbilt University. After completing a residency in Internal Medicine at The University of North Carolina-Chapel Hill and then serving for three years in the National Health Service Corp he then completed subspecialty fellowship training in Clinical Immunology and Rheumatology at the University of Alabama at Birmingham.
Zhi Cheng, MD
Internal Medicine
Zhi Cheng, MD, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Having grown up in Texas, Dr. Cheng received his bachelor’s degree in business from the University of Texas at Austin, which he followed up with a medical degree from the University of Texas Medical Branch (UTMB) John Sealy School of Medicine. Afterwards, he came to Las Vegas, Nevada, to complete his internal medicine residency at Sunrise Health Graduate Medical Education (GME) Consortium.
Jacqueline Choa, MD
Internal Medicine, Pulmonology
Born and raised in the Philippines, Jacqueline Choa, MD, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. After receiving her medical degree from the Cebu Institute of Medicine, Dr. Choa completed her internal medicine residency at the Kirk Kerkorian School of Medicine. After her residency, she went to Tulane University to pursue a fellowship in pulmonary and critical care, following it up with an additional year of training in interventional pulmonology at the University of Utah.
Lisa Contreras, RDN, LD, CDCES
Internal Medicine, Registered Dietician
Lisa Contreras, RDN, LD, CDCES, is a registered dietitian nutritionist and certified diabetes care and education specialist.
With more than 20 years of combined experience as a dietitian, health educator, and former teacher, she enjoys helping people learn and thrive. She has worked in clinical, private practice, and community settings.
Buddhadeb Dawn, MD
Cardiology, Echocardiography
Buddhadeb (Buddha) Dawn, MD, is tenured Professor and Chairman of the Department of Internal Medicine at the Kirk Kerkorian School of Medicine at UNLV. He is also the Chief of the Division of Cardiovascular Medicine.
G. A. DeAndrea, MD, MBA
Internal Medicine, Neurology
G. A. DeAndrea, MD, MBA, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. A graduate of Georgetown University School of Medicine, Dr. DeAndrea completed his residency in neurology at Georgetown University Medical Center and a clinical neurophysiology fellowship at the University of Washington, Seattle.
Leora Frimer, MD
Internal Medicine, Geriatrics
Leora Frimer, MD, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Originally from Canada, Dr. Frimer received her bachelor’s degree in psychology from McGill University. Additionally, she received her medical degree from St. George’s University and her master’s degree of public health from McGill University. After completing her residency in internal medicine at the University of Central Florida/HCA Florida Healthcare GME Consortium, Dr.
Mitchell Forman, DO
Internal Medicine, Rheumatology
Mitchell Forman, DO, is the director of the rheumatology fellowship program at the Kirk Kerkorian School of Medicine at UNLV.
A rheumatologist for more than 40 years, including four years of directing a rheumatology clinical practice until 2022 at UNLV Health, Dr. Forman helped found the Touro University Nevada College of Osteopathic Medicine in Henderson, where he served as dean for 12 years. During his time at Touro, he also served terms as president of the Nevada State Medical Association and the Clark County Medical Society.
Yonatan Ghiwot, MD
Internal Medicine
Yonatan Ghiwot, MD, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Dr. Ghiwot attended Texas A&M University where he earned a bachelor’s degree in biomedical sciences. He then completed his medical education at St. George’s University and followed up with his residency in internal medicine at Florida Atlantic University.
Badrunnisa Hanif, MD
Internal Medicine
Dr. Badrunnisa Hanif, MD, FACP, Board Certified in Internal Medicine since 2002 is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. She was graduated from Sindh Medical College in Karachi, in 1996, and completed her residency training in 2002 from the University of Nevada, Reno School of Medicine.
Angelica E. Honsberg, MD
Internal Medicine, Pulmonology
Dr. Angelica Honsberg, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, graduated from the Sidney Kimmel Medical College in Philadelphia.
She completed her internal medicine residency at Thomas Jefferson University and a pulmonary fellowship at the University of Arizona.
Dr. Honsberg is board certified by the American Board of Internal Medicine.
Kenneth Izuora, MD, MBA
Internal Medicine, Endocrinology
Dr. Kenneth E. Izuora, an associate professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, believes it is vital that he uses his education to “make an impact on people’s lives.”
A graduate of the University of Nigeria Faculty of Medicine, he is board certified by the American Board of Internal medicine. Fellowship trained at Emory University in Atlanta, he specializes in endocrinology.
Nazia Khan, MD
Internal Medicine
Dr. Nazia Khan, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, received her medical degree at Dow Medical College in Pakistan.
Board certified in internal medicine by the American Board of Internal Medicine, she completed a residency at the University of Nevada Reno School of Medicine.
Her research includes work done at the LDS Hospital Cardiovascular Research Division in Salt Lake City, UT.
Mutsumi John Kioka, MD
Internal Medicine, Pulmonology
Dr. Mutsumi Kioka, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, is board certified in internal medicine by the American Board of Internal Medicine.
A graduate of the Loma Linda University School of Medicine, he completed a residency at the University of Southern California and a fellowship through Wayne State University.
Vignan Manne, MD
Internal Medicine, Gastroenterology
Vignan Manne, MD, who specializes in internal medicine, gastroenterology and hepatology, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine.
A graduate of the Ross University School of Medicine in Florida, Dr. Manne completed a fellowship in gastroenterology and hepatology from the Sunrise Health Graduate Medical Education Consortium in Las Vegas, Nevada, and an advanced/transplant hepatology fellowship from the Swedish Medical Center-First Hill in Seattle, Washington.
Eric McClintock, MD
Internal Medicine
Eric McClintock, MD, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Originally from Reno, Nevada, Dr. McClintock received his bachelor’s degree in science from the University of Nevada, Reno before attending the Kirk Kerkorian School of Medicine as a member of its charter class. After receiving his medical degree, he completed an internal medicine residency at the Kirk Kerkorian School of Medicine.
Justin Jeffries, MD
Internal Medicine, Pulmonology
Justin Jeffries, MD, was born and raised in Memphis, Tennessee. He attended Morehouse College on an academic scholarship where he studied biology. He earned his medical doctorate from Meharry Medical College in Nashville, Tennessee, and subsequently completed a postdoctoral program in medical education at the same institution. Dr. Jeffries completed his internal medicine residency and served as chief resident to the program at the Kirk Kerkorian School of Medicine at UNLV where, post-residency, he also completed a pulmonary and critical care fellowship. During his time as a fellow, Dr.
Ana Mrkaic, MD, PhD
Internal Medicine, Endocrinology
As an endocrinologist, Dr. Ana Mrkaic, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, treats the problems, diseases and medical conditions of the endocrine system, an intricate network of glands producing hormones that regulate various functions in the body.
Gordon Ohning, MD
Internal Medicine, Gastroenterology
Dr. Gordon Ohning, a professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, graduated from the Case Western Reserve University School of Medicine
He completed a residency in internal medicine at the University of Iowa and a fellowship in gastroenterology from UCLA.
After 30 years as a professor at UCLA — he also was a prolific researcher with the CURE: Digestive Diseases Research Center there — Ohning said the opportunity to help create the new UNLV School of Medicine was too good to pass up.
Josue Portillo, DO
Internal Medicine
Josue Portillo, DO, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Originally from Las Vegas, NV, Dr. Portillo received his bachelor’s degree in cell and molecular biology from UNLV. Afterwards, he earned his medical degree from Rocky Vista University College of Osteopathic Medicine and completed his residency in emergency medicine at Loyola University Medical Center. Returning to his hometown, Dr. Portillo completed his critical care medicine fellowship at the Kirk Kerkorian School of Medicine.
Kush D. Modi, MD
Internal Medicine, Pulmonology
Dr. Kush Modi, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, received his medical degree Gujarat University in Ahmedabad, India.
He completed his Masters in Public Health at Drexel University. He completed residency in internal medicine at Drexel University and a fellowship in pulmonary and critical care at State University of New York at Buffalo.
Dr. Modi is associate fellowship program director for pulmonary and critical care at the Kirk Kerkorian School of Medicine at UNLV.
Arthur O. Romero, MD
Internal Medicine, Pulmonology
Dr. Arthur Oliver Romero, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, graduated from the University of Philippines College of Medicine.
He specializes in pulmonary critical care medicine and internal medicine.
Dr. Romero is board certified by the American Board of Internal Medicine in pulmonary disease, critical care medicine and internal medicine.
Shelby Schuh, DO
Internal Medicine
Shelby Schuh, DO, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. Originally from Wisconsin, Dr. Schuh received her medical degree from Nova Southeastern University College of Osteopathic Medicine. Following this, she completed her internal medicine residency at the University of Missouri-Columbia.
Jill Sharma, MD
Internal Medicine, Pulmonology
Jill Sharma, MD, who specializes in the management of pulmonary diseases and the care of critically ill patients, is an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine.
Dr. Sharma earned her medical degree from the Mercer University School of Medicine in Georgia. At the Kirk Kerkorian School of Medicine, she completed an internal medicine residency and a fellowship in pulmonary and critical care.
Aditi Singh, MD
Internal Medicine
Dr. Aditi Singh, an associate professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, is associate medical director of the internal medicine residency program.
A graduate of the University of Nevada Reno School of Medicine, she cares for patients in the areas of preventative medicine, diabetes, hypertension management and women’s health.
Director of ambulatory education in the internal medicine program, Dr. Singh is board certified by the American Board of Internal Medicine.
Misti Song, MD
Internal Medicine
Dr. Misti Song, an assistant professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, received her medical degree from Loma Linda University.
She is board certified in internal medicine by the American Board of Internal Medicine.
John Varras, MD
Internal Medicine, Diabetes and Weight Management
Dr. John Varras, is a professor at Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine. He attended medical school at Creighton University in Nebraska, where he also completed his residency.
He is the former chair for the department of internal medicine at the University of Nevada Reno School of Medicine. Under his leadership, the department of internal medicine expanded the size of the residency training program and started three new fellowships in cardiology, gastroenterology, and pulmonary and critical care.
Sandhya Wahi-Gururaj, MD
Internal Medicine
Dr. Sandhya Wahi-Gururaj, an associate professor in the Kirk Kerkorian School of Medicine at UNLV Department of Internal Medicine, is a board-certified general internist and currently serves as the internal medicine residency program director.
A member of the American College of Physicians, Dr. Wahi-Gururaj has helped to shape curricula and training programs for local fellows and residents while maintaining a clinical presence that centers on establishing long-lasting, communicative relationships with her primary care patients.
Ji Won Yoo, MD, MS
Internal Medicine, Geriatrics
Ji Won Yoo, MD, is the Nevada Interprofessional Healthy Aging Network Program Director and Assistant Professor in the Department of Internal Medicine at the Kirk Kerkorian School of Medicine at UNLV. Nevada is a very popular place to retire, especially, with the baby boomer generation. At the same time, the number of providers of medical care in Nevada has not kept pace with the overall population and specifically, not with the geriatric population. For example, Nevada ranks 48th out of 50 states in primary care provider shortage. As we age, care often becomes more complex.
Dr. Amber Champion is a Champion for Her Patients
If you ask Dr. Amber Champion why she’s now a UNLV Medicine endocrinologist with an emphasis in diabetes, she begins by telling you a story that’s set in Australia, a story about an abnormally hungry 27-year-old medical student who ended up in the emergency room with blurry vision and an unquenchable thirst — a young woman whose car broke down, whose bicycle burned up.