Dr. Marcus Reyes, MD
Barton Brezina, MD
About Nephrology Associates, PC
Kidney care, made personal — built on partnership, guided by evidence.
For more than three decades, families across the Central Savannah River Area have turned to us when their kidney health needed a steady hand. We listen first, explain clearly, and build a plan that respects the life you want to keep living.
Our Team
The people behind your care.
Physicians, nurse practitioners, dialysis specialists, and patient coordinators — together, we are the team you will come to know across the long arc of your kidney health.
Dr. Elena Caldwell, MD
Ryan Altenburg, DO
Dr. Samuel Okafor, MD
H. Doug Hubert, MD
Dr. Priya Venkataraman, MD
Devesh Patel, MD
Jordan Hartwell, NP
S. Nabil Babar, MD
Amara Bellamy, NP
Matthew Diamond, DO
Theresa Morales, PA-C
Mark Smith, MD
Devon Kim, PA-C
James Stenard, MD
Rachel Lindstrom, RN
Cara Overstreet, FNP-C
Caleb Whitfield, RN
Ben Gentry, PA-C
Naomi Asante, RN
Gretchen R. Folk, FNP-C
Brian Solano, RN
Kirsten Sawyer, PA-C
Imani Forsythe
Rebecca White, NP-C
Gabriel Rosario
Courtney Nuckols, NP-C
Hannah McAllister
Nadeem Afzal, MD
Elliot Brennan
Michael B Whitlow, MD
Sofia Petrović
Trevor Tobin, DO, FASN
Wesley Tran
Shelby Craig, AGACNP, BC
Careers
Join a team that cares deeply.
We're always interested in hearing from clinicians and care professionals who share our commitment to patient-centered nephrology. Tell us a little about yourself and where you'd like to contribute.
- Physicians, NPs, PAs, and RNs at every stage of practice
- Dialysis specialists, dietitians, and patient coordinators
- Supportive culture with continuing education and mentorship
- Competitive benefits across our CSRA-area locations
Let's Start the Conversation
Your kidney health deserves a partner — not just a provider.
Whether you've just been referred, you're seeking a second opinion, or you're ready to take chronic kidney care more seriously, we'd be honored to meet you. Most patients see a nephrologist within two weeks of reaching out.