
Medical Consulting | Innovation
About Me
My goal is to be a leader in the rapidly changing face of health care. As technology companies come into medicine, I truly believe they need the insight of real life, experienced physicians to improve the lives of patients.
As far as experience…..
- 15+ years as a board certified nephrologist - both clinical and interventional (dialysis access related procedures)
- 11 years in private practice, as partner, more recently at a University of Texas San Antonio
- Highly versed in value based care and trends in the kidney care market
- Passionate about education through public speaking, social media and video creation
- Hosted webinars and given lectures on kidney care
- Actively involved as a consultant in innovative companies including artificial intelligence, medical device, telehealth, remote patient monitoring, digital health, health insurance and more
Oh, and I still practice part-time medicine to make sure I keep grounded in patient care. I want to work with entrepreneurs that have serious ideas to improve health care, meet interesting people and have fun along the way. castillosenaragon.org
Available For

Medical Consulting and Advisory

Public Speaking/ Webinars

Patient Education
What My Clients Say
Dora Pebbles Smith
Caring, and loving what he does, need more caring Dr’s like him. Thank you Dr Butt for your compassion and your amazing skill in loving what you do for all your patience
Mark Marion
Dr Butt is a eminently qualified medical professional and is a compassionate human being!
Laura Provenzano Lomax
Dr.Butt is an extremely knowledgeable nephrologist that genuinely cares about his patients and improving their lives.
Vicente Delicia Valdez
I have been a nurse for 13 years and always enjoy when Physicians get involved in teaching and engaging with their patients. Dr Butt shows that passion. Thanks for you great video.