Diabetes and Endocrinology Institute at Renaissance

Diabetes Care Team

Dr. Marcel Twahirwa
Medical Director of the Diabetes and Endocrinology Institute at Renaissance

Dr. Marcel Twahirwa is Board Certified in Internal Medicine and Board Certified in Endocrinology, Diabetes and Metabolism. He is a resident of Rio Grande Valley and fluent in both English and Spanish. He graduated from La Universidad de Montemorelos, Nuevo Leon, MX. He completed his residency in Internal Medicine at New York Medical College, Metropolitan Hospital, New York, NY. In addition, he completed a fellowship program in Diabetes, Endocrinology and Metabolism at the University of Pennsylvania, Philadelphia, PA. He received his Board Certification in Internal Medicine in 1996 and his Board Certification in Endocrinology, Diabetes and Metabolism in 2000. Dr. Twahirwa has been taking care of patients with diabetes in the Rio Grande Valley since he moved to South Texas in 1998. He practiced at Diabetes and Endocrine Center from 1999 until May 2011 when he accepted the position of Medical Director at the Diabetes and Endocrinology Institute at Renaissance.

Dr. Twahirwa strongly believes in empowering the patient through education and he believes education is really the key to help stop diabetes. He is passionate about his work and a leader in advocacy for early detection, treatment and prevention of diabetes. Dr. Twahirwa has a special interest in research and has been working in conjunction with other physicians on clinical trials at Doctors Hospital at Renaissance to find treatments for diabetes and other chronic health conditions.


Jose A. Llinas Cepedea, MD

Dr. Jose Llinas specializes in endocrinology, diabetes, and metabolism. He is board certified in Internal Medicine and Fellowship-trained in Endocrinology. He is a member of the American College of Physicians, the American Association of Clinical Endocrinologists, and the Endocrine Society. He is fluent in English and Spanish.

Dr. Llinas received his medical degree from Universidad del Norte in Barranquilla, Columbia. He conducted his internal medicine residency training at the University of Miami Miller School of Medicine and the JFK Medical Center/ VA Medical Center. He completed his Fellowship training in endocrinology, diabetes, and metabolism at the J. Maxwell McKenzie Fellowship Program at the University of Miami and Jackson Memorial Hospital.





Michelle L. Cordoba Kissee, MD

Dr. Michelle Cordoba Kissee is board certified in Internal Medicine and Endocrinology, Diabetes and Metabolism. She is fluent in both English and Spanish.

Dr. Cordoba Kissee graduated with a doctorate degree from the University of Wisconsin at Madison. She conducted her internal medicine residency and fellowship at the University of Arizona. Dr. Cordoba has extensive experience in community outreach and the treatment of diabetes.

In addition to treating patients at the Diabetes and Endocrinology Institute at Renaissance, Dr. Cordoba Kissee serves as the Associate Program Director of the Internal Medicine Residency Program at the University of Texas Health Science Center at San Antonio (University of Texas Rio Grande Valley – Doctors Hospital at Renaissance).


 
Melany Castillo, MD

Dr. Melany Castillo specializes in endocrinology, diabetes, and metabolism. She is fluent in both English and Spanish.
 
Dr. Castillo received her medical degree from the University of Bucaramanga. She completed residency training in internal medicine at the University of Miami Department of Medicine and Jackson Memorial Hospital, where she also conducted fellowship training in metabolism and endocrinology. 
 








Mindy Ann Garces, BSN, RN
Diabetes Education Coordinator and Registered Nurse

Mindy is the diabetes education program coordinator at the Diabetes and Endocrinology Institute at Renaissance.

Mindy received a Bachelor of Science in Nursing degree from the University of Texas Pan American. Mindy has spent time at the Joslin Diabetes Center in Boston, Massachusetts where she worked closely with the Latino Diabetes Initiative program to understand the needs of the Latino community.

As an acute care nurse at Doctors Hospital at Renaissance, Mindy saw the impact of diabetes complications on patients and their family. She decided to join the Diabetes and Endocrinology Institute at Renaissance team and Dr. Marcel Twahirwa in the out-patient setting, where she felt she could make a difference by educating individuals with diabetes on how to reduce their risk for complications, improve their lives with diabetes and also to help prevent diabetes through education.


Maggie Salinas
Center Administrator

Maggie Salinas is the Center Administrator at the Diabetes and Endocrinology Institute at Renaissance. She has been working in the medical field for 25 years. She started in private practice and has been working alongside Dr. Twahirwa for the past 14 years. Her priorities are exemplary customer service and managing the clinic using innovative strategies to meet the needs of the community.


Mayra J. Cantu, MSN, FNP-BC
Advanced Practice Registered Nurse

Mayra received her Bachelor of Science in Nursing degree from the University of Texas Pan American. In May of 2014, she earned her Masters of Science in Nursing degree from the same university. Mayra is certified as a Family Nurse Practitioner by the American Nurses Credentialing Center and is a member of Sigma Theta Tau National Honor Society. Since 2009, she has been practicing healthcare in both hospital and outpatient settings.

Mayra feels honored to be able to practice and be a member of the team at the Diabetes and Endocrinology Institute at Renaissance. Throughout her career development Mayra has witnessed the impact diabetes can have on patients, family members, and the community. With her education, desire to learn and dedication to her profession, Mayra strives to deliver the most compassionate and competent care. She believes in treating patients with respect, compassion and empowering them to make healthy decisions about their lifestyle and treatment options.


Lizlette Quintanilla 
Registered Dietitian Nutritionist 

Lizlette has a Bachelor of Science Degree in Dietetics from The University of Texas- Pan American. Through the Coordinated Program of Dietetics she realized the profound impact and need for nutrition and diabetes education across the valley. Lizlette has made it her personal goal to deliver individualized patient-centered nutritional care. 
 
 
Alexandra Garza-Ibanez
Registered Dietitian
 
Alexandra received her Bachelor of Science Degree in Dietetics from The University of Texas-Pan American in 2011. Alexandra is an experienced dietician with training in the critical health care and outpatient settings. In the outpatient setting Alexandra is dedicated to educating patients on the self-management of diabetes. She strongly believes that education is the key for the prevention and treatment of many chronic conditions.
 
 
Annette Y. Ozuna, Pharm.D.
Clinical Pharmacist
 
Dr. Annette Y. Ozuna earned her Doctor of Pharmacy degree from the University of Texas-College of Pharmacy in May 2004.  Dr. Ozuna is originally from the Rio Grande Valley and has been serving our community for over 10 years in both outpatient and hospital settings, including working and managing her own independent retail pharmacy.  Dr. Ozuna has completed certificate training programs for Delivering Mediation Therapy Management Services, Pharmacy-Based Immunization Delivery and The Pharmacist and Patient-Centered Diabetes Care.
 
Dr. Ozuna is honored to have been given the opportunity to embrace the concept of pharmaceutical care and become part of the diabetes care team at the Diabetes and Endocrinology Institute at Renaissance.  Her passion for assisting diabetic patients in the management of their condition came from a strong family history of diabetes. It is Dr. Ozuna’s goal to empower patients by actively involving patients in their care and educating them about their disease state and medications.  Dr. Ozuna is most rewarded by the interactions, relationships, and trust built on a daily basis with patients while seeing improvement in their condition.

 
Stephanie Zeneé Martinez, PharmD
Clinical Pharmacist
 
Dr. Stephanie Martinez is one of two clinical on staff pharmacists at the Diabetes and Endocrinology Institute at Renaissance who acts as a resource for medication information.
 
Dr. Martinez is a native of the Rio Grande Valley and completed her prerequisite curriculum at the University of Texas Pan American before attending the University of Texas at Austin for her graduate pharmacy studies.  In May of 2014, Dr. Martinez graduated second in her class from the University of Texas – College of Pharmacy. After graduation, Dr. Martinez returned to the Valley and began working in the retail setting until she became part of the Clinical Pharmacy staff at Doctors Hospital at Renaissance in March of 2015.
 
Dr. Martinez’s life goal has always been to return to the Rio Grande Valley and serve her community. Her career goal is to aid patients in receiving the most benefit from their medications.  Through education and empowerment, Dr. Martinez hopes to provide patients with a greater understanding of how their medications work, why each of their medications are important, as well as, the most beneficial way to take their medications while avoiding drug-related adverse effects.
 

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