About Us

We’re focused on neurology and sleep medicine. Our specialists are fellowship trained so that it can be translated to a dedicated and comprehensive approach to your care. We are here for you. Patients first. 

Our Providers


Hanul S Bhandari, MD


Dr. Bhandari is board certified in sleep medicine and neurology. He completed his fellowship training at Baylor College of Medicine. He started his journey by getting his undergraduate training in neurobiology and computer science at the University of Texas (UT) at Austin. He went on to attend medical school at UT Medical Branch and completed his residency training at UT Southwestern. Dr. Bhandari’s primary goal is improving the quality of life for those suffering from debilitating conditions such as sleep disorders, epilepsy, chronic headaches, among other conditions. 

He has called San Antonio home for over 25 years. When he is not spending time practicing, he enjoys spending time with his wife, Darshana, his daughter, Vishnavie, and his son, Vishnum, and his family in addition to painting, traveling, and faceting gemstones. 

Founder & CEO

Christina Vela, FNP, APRN, AGPCNP-BC

Nurse Practitioner

Christina is a caring and committed nurse practitioner. Born and raised in San Antonio Texas, she earned her Bachelors of Science in Nursing from Our Lady of the Lake University. While working as a nurse she continued with her education and pursued her Masters of Science degree with a specialty in Adult-Gerontology Primary Care at Walden University. With over 10 years of nursing experience, in primary care practice, mental health and home health care Christina has learned the skills needed to develop a trusting relationship with her patient’s. She is fluent in both English and Spanish. Christina is currently certified by the American Association of Nurse Practitioners. Christina looks forward and is excited to provide the best care possible to patients at Nidraveda!  


Krystine Awwiller, FNP-C, APRN

Nurse Practitioner

Krystine was born and raised in Gambier Ohio and recently moved to San Antonio Texas due to her spouse’s job in the USAF. She has an undergraduate degree in nursing from Muskingum University and a graduate degree in nursing from Walden University specializing as a Family Nurse Practitioner. Krystine is certified by the American Association of Nurse Practitioners. She has 8 years of nursing experience where she spent most of that time as an emergency room nurse. Krystine is excited to join our team here at Nidraveda and help better the lives of her patients.

When not at work, Krystine enjoys spending time with her spouse and two children while exploring the many things that the great state of Texas has to offer. She also enjoys cycling, reading, and traveling.


Ernest Hwang, DDS


Dr. Eojin “Ernest” Hwang was born in South Korea and raised in Texas. After getting his Bachelor in Biology at Baylor University in Waco, TX, he has received his DDS degree from UT Health Science Center in San Antonio. Dr. Hwang has been working as a general dentist for the past five years in San Antonio. He loves helping patients with TMJ, migraine, and sleep disorders. He now looks forward to further helping patients at Nidraveda with sleep appliances including MADs.

Dr. Hwang is blessed with a beautiful family of his wife and two children. When he isn’t working he enjoys traveling, attending Spurs games, and taking continuing education courses.

Administrative Department

William Johnson

Practice Manager


Mercedes Minier

Assistant Practice Manager

Born and raised in San Antonio, Mercedes has had her degree in Healthcare Management for over three years now, prior to that she was working as a National Registered Certified Medical Assistant for over seven years in all different specialties including; Dermatology, ENT, Interventional Pain Management, Gastroenterology, Asthma and Allergy, as well as Family Practice.  Mercedes also has 5 years of experience in the accounting field. She strives for excellent and efficient patient care, that follows trying to help a facility run with structure and organization.

Outside of the clinic, she loves to read books, sing, and color abstract art books in her spare time. She also enjoys doing art and watching movies with her fiancé Ryan and their fur babies Binx, and Buddha.