Our Providers

Meet UPG’s Healthcare Providers & HIV Specialists

Uptown Physicians Group’s HIV Specialist ^TM physicians and providers are dedicated to delivering exceptional medical care. Specializing in comprehensive and compassionate medical care for individuals living with HIV, as well as offering a broad range of general primary care services, our healthcare professionals are committed to ensuring that every patient receives the highest standard of care.

At Uptown Physicians Group, we take pride in our healthcare professionals’ unwavering dedication to improving the lives of those we serve and their role in leading the way in HIV medicine and general primary care.

View all our services here. Office location, hours, and contact information for appointments and questions can be found here.

Donald A. Graneto, MD

Dr. Graneto works to keep Dallas healthy – one patient at a time – by creating individual health plans customized to each patient’s unique needs. He grew up in Cleveland, Ohio, and graduated from The Ohio State University College of Medicine before moving to Dallas. He completed his residency in Family Medicine at the University of Texas Southwestern, and is certified by the American Board of Family Medicine. His areas of interest include preventive medicine, general primary care, HIV treatment, health information technology, and optimizing management of chronic medical conditions.

Family Practice
HIV Specialist ™
D Magazine Top Doctors 2015

William Anthony Hays, MD, ATC, LAT

Dr. Hays grew up in Iowa and then relocated to Arkansas with his family while he was in high school. He later attended the University of Arkansas for his undergraduate studies and received a Bachelor of Science degree in Education with an emphasis in Athletic Training. He is currently Board Certified in Athletic Training and also licensed in the State of Texas as an Athletic Trainer. He attended California University of Pennsylvania and received a Master’s Degree in Exercise Science with an emphasis in Performance Enhancement and is certified as a Performance Enhancement Specialist through the National Academy of Sports Medicine.

Dr. Hays attended Medical School at Ross University School of Medicine and completed his residency training in Family Medicine at the University of Arkansas for Medical Sciences Regional Programs in Fayetteville, Arkansas. He is an avid HOGS fan, and his interests include HIV Medicine, Sports Medicine, along with Wellness and Primary Care Medicine.

Family Practice
HIV Specialist ™

Dan Nguyen, MD

Since his freshman year of high school, Dan Nguyen dreamed of becoming a physician who cares for, understands, and serves as a role model for the LGBTQ+ community. As a resident intern, he volunteered at a local STI clinic in Austin, Texas, on his days off. He continued to volunteer there and eventually worked full-time. It was in this setting that he cultivated a sex-positive attitude toward health and wellness, as well as an understanding of providing care to people living with HIV/AIDS.

In addition, he has experience with curative treatments for Hepatitis and Buprenorphine for Medication-Assisted Treatment (MAT).

A Dallas native, Dan moved back from Austin to join UPG, continue his career in HIV medicine, sing with the Turtle Creek Chorale, and spend more time with his nieces and nephews—an easy decision.

Fun facts: His bachelor’s degree is in computer science, making him a huge technology enthusiast. He enjoys reading tech blogs, MotorTrend car reviews, playing pickleball, and jogging. In 2021, he ran his first half marathon—and finished in a cute pair of pink stilettos!

HIV Specialist ™

Nathan Luke, MD

Dr. Nathan Luke is a family medicine physician who provides comprehensive primary care. Born and raised in Maryland, he completed his undergraduate degree at the University of Maryland, College Park. He was awarded his medical degree from Oakland University William Beaumont School of Medicine. Then, he completed his Family Medicine Residency at LewisGale Medical Center in Roanoke, Virginia, where he was selected to be Chief Resident during his final year of training. Dr. Luke enjoys seeing patients for both acute and chronic conditions. He is passionate about connecting with patients and providing patient-centered care. He also enjoys traveling, spending time with family, cooking, and trying new foods.

Family Medicine
High-Res Anoscopy
HIV Specialist ™

Vanessa Bludau, MSN, APRN, FNP-C

Vanessa Bludau, FNP-C, was born and raised in Texas. She attended Texas Tech University, where she received her Bachelor of Science in Nursing with honors (Sigma Theta Tau). She graduated in 2012 with her Master of Science as a Family Nurse Practitioner from Texas Woman’s University with a GPA of 3.9. Vanessa is certified through the American Association of Nurse Practitioners and is licensed by the Texas Board of Nursing as a Family Nurse Practitioner.

In her free time, Vanessa enjoys working out and spending time with her Golden Retriever, Hunter.

Advanced Practice Registered Nurse
Family Nurse Practitioner

Richard (Rick) Ornberg, DNP, APRN, FNP-C

Rick is passionate about providing inclusive, patient-centered, holistic primary care to his patients. He completed nursing school at the University of Texas at Arlington with a Bachelor of Science in Nursing. He worked as a nurse in the emergency department at multiple Level I trauma centers. Rick then earned his Doctorate in Nursing Practice from Texas Wesleyan University. His doctoral project studied the use of alternative, mindfulness-based, and holistic interventions to manage chronic pain. After graduation, he worked in an addiction and recovery facility as a primary care provider. He is a board-certified Family Nurse Practitioner through the American Association of Nurse Practitioners as well as credentialed by the American Academy of HIV Medicine as an HIV Specialist ^TM.

Rick grew up in Chicago before relocating to Dallas where he has lived for over 30 years. In his free time, he enjoys traveling and spending time with his family and three pups.

Doctor of Nursing Practice
Advanced Practice Registered Nurse
Family Nurse Practitioner
HIV Specialist ™

Jason Vercher, PA-C

Jason Vercher, PA-C, grew up in Pineville, Louisiana. He graduated Cum Laude from the University of Texas at Arlington with a degree in Biology. He completed his Master of Physician Assistant Studies at the University of Texas Health Science Center at San Antonio in 2016, where he was ranked in the top 5 of his class. He is also a member of the Pi Alpha National Honor Society for Physician Assistants. His interests included HIV treatment and prevention, health maintenance, and preventative medicine. Jason enjoys partnering with patients to help them create innovative ways to engage in their health.

Certified Physician Assistant
HIV Specialist ™

Natalie Smith-Low, LCSW-S, RYT

Natalie Smith-Low is a clinical social worker and supervisor and a registered yoga teacher.

Licensed Clinical Social Worker, Supervisor