Southern Texas Nephrology
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Nephrology Providers at Southern Texas Nephrology

Dr. Ricardo Baltodano

Dr. Ricardo Baltodano, a dedicated medical provider specializing in kidney care, received his medical degree from Universidad Autónoma de Nicaragua and has been practicing for over 20 years. 


Hospitals: 


- Valley Regional Medical Center - Brownsville, TX 

- Solara Specialty Hospital - McAllen, TX 

- Doctors Hospital at Renaissance (DHR Health) - Edinburg, TX 


Education: 


Medical School & Residency 

- University of Texas Medical Branch Hospitals 

- Fellowship in Nephrology, 2011-2013 

- Texas Tech University HSC El Paso 

- Chief Residency in Internal Medicine, 2010-2011 

- Texas Tech University HSC El Paso 

- Residency in Internal Medicine, 2008-2011 

- Universidad Autónoma de Nicaragua Faculty of Medicine 

- Medical School, 1994-1999 


Certifications & Licensures: 


- American Board of Internal Medicine Certified in Nephrology 

- American Board of Internal Medicine Certified in Internal Medicine 

- Texas State Medical License - Active through 2024

Dr. Reuben Valentin

Dr. Reuben Valentin received his medical degree from Universidad de Guadalajara and has been practicing medicine for over 13 years, specializing in kidney care. He is associated with several renowned medical providers, including: 


- Valley Regional Medical Center - Brownsville, TX 

- Solara Specialty Hospital - McAllen, TX 

- Doctors Hospital at Renaissance (DHR Health) - Edinburg, TX 


**Education:** 


**Medical School & Residency** 


- University of Texas Health Science Center San Antonio 

  - Fellowship in Nephrology, 2009-2011 

- University of Texas Health Science Center San Antonio 

  - Residency in Internal Medicine, 2006-2009 

- Universidad de Guadalajara, Medical School 


**Certifications and Licensures:** 


- American Board of Internal Medicine - Certified in Nephrology 

- American Board of Internal Medicine - Certified in Internal Medicine 

- Texas State Medical License - Active through 2023

Dr. John Manllo Dieck

Dr. John Manllo received his medical degree from the Instituto Tecnologico y de Estudios Superiores de Monterey, Nuevo Leon, and has been in practice for over 8 years, specializing in nephrology. Nephrologists like Dr. Manllo focus on kidney care, treating conditions such as hypertension, hyperkalemia, chronic kidney disease, hemodialysis, kidney transplantation, and other kidney-related illnesses. Patients must obtain a referral from their primary care doctor to see a nephrologist.


Dr. Manllo practices at several hospitals, including Valley Regional Medical Center, Solara Specialty Hospital, and Doctors Hospital at Renaissance (DHR) in Brownsville.


His education includes medical school and residency at Johns Hopkins University, along with a fellowship in Transplant Nephrology from 2016 to 2017 and a fellowship in Nephrology from 2014 to 2016. He completed his Internal Medicine residency at Henry Ford Hospital from 2011 to 2014, following his medical education at Monterrey Institute of Technology.


In terms of certifications, Dr. Manllo is board certified by the American Board of Internal Medicine in both Nephrology and Internal Medicine and holds an active Texas State Medical License.

Dr. Roberto Manllo Karim

Dr. Roberto Manllo earned his medical degree from the Instituto Tecnologico y de Estudios Superiores de Monterrey in Monterrey, Nuevo Leon, and has over 37 years of experience in the field. 


Specialty: 


Nephrology 


As a nephrologist, Dr. Manllo focuses on kidney care, addressing conditions such as hypertension, hyperkalemia, chronic kidney disease, hemodialysis, kidney transplantation, and various other kidney-related illnesses. To receive specialized treatment, patients must obtain a referral from their primary care doctor to see a nephrology expert. 


Location & Contact: 


Southern Texas Nephrology 


1080 E. Los Ébanos Blvd, Suite A 


Brownsville, Tx 78520 


Office Phone: (956) 542-3472 


Office Fax: (956) 546-3112 


Hospitals: 


Valley Regional Medical Center 


Solara Specialty Hospital 


Doctors Hospital at Renaissance (DHR) in Brownsville 


Education: 


Medical School & Residency 


University of Kansas School of Medicine 


Fellowship in Nephrology, 1993-1994 


Baylor College of Medicine 


Residency in Internal Medicine, 1989-1992 


Tecnologico de Monterrey Escuela de Medicina, Medical School, 1985 


Certifications and Licensures: 


American Board of Internal Medicine - Certified in Nephrology 


American Board of Internal Medicine - Certified in Internal Medicine 


Texas State Medical License - Active

Dr. Sergio Trevino Manllo

Dr. Sergio Trevino earned his medical degree from Instituto Tecnologico y de Estudios Superiores de Monterrey, Nuevo Leon, and has been providing kidney care for 9 years in the field of nephrology.


Specialty:


Nephrology


Nephrologists, like Dr. Trevino, specialize in the care of your kidneys, treating conditions such as hypertension, hyperkalemia, chronic kidney disease, hemodialysis, kidney transplantation, and other kidney-related illnesses. It's important to note that your primary care doctor must refer you to a nephrologist for specialized care.


Location & Contact:


Southern Texas Nephrology


1080 E. Los Ebanos Blvd, Suite A


Brownsville, Tx 78520


Office Phone: (956) 542-3472


Office Fax: (956) 546-3112


Hospitals:


Valley Regional Medical Center


Solara Specialty Hospital


Doctors Hospital at Renaissance (DHR) (Brownsville)


Education:


Medical School: Escuela de Medicina Ignacio A. Santos


Residency: Johns Hopkins University


Fellowship in Nephrology, 2015-2017


Internal Medicine Residency, Henry Ford Hospital, 2012-2015


Certifications and Licensures:


American Board of Internal Medicine - Certified in Nephrology


American Board of Internal Medicine - Certified in Internal Medicine


Texas State Medical License - Active

Ana Ortega, PA-C

Ana Ortega's education began at The University of Texas-Pan American in Edinburg, TX, where she earned a Bachelor of Science in Dietetics with a Minor in Chemistry. She furthered her studies at The University of Texas Rio Grande Valley, obtaining her Master of Science degree, and has since served as a Nephrology physician assistant for 3 years. 


In her role, Ana Ortega collaborates with our Nephrology doctors to provide exceptional kidney care to our patients. She is skilled in assessing patient symptoms, diagnosing illnesses, and prescribing medications for conditions such as hypertension, hyperkalemia, chronic kidney disease, kidney failure, kidney transplantation, and other kidney-related ailments. Ana is fluent in both English and Spanish, enhancing her ability to communicate effectively with a diverse patient population. 


Ana works at several hospitals, including Valley Regional Medical Center in Brownsville, TX, Solara Specialty Hospital in McAllen, TX, and Doctors Hospital at Renaissance (DHR Health) in Edinburg, TX, where she contributes to the efforts of our medical providers in delivering quality nephrology care.

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