Meet Our People
Sarah Ansbro, MD, MBA
Dr. Sarah Ansbro is a board-certified psychiatrist who has cared for adults in San Antonio for over a decade. She earned her medical degree at Baylor College of Medicine and her MBA at Rice University, then completed her psychiatry residency at the University of South Florida.
Her practice covers depression, anxiety, PTSD, ADHD, bipolar disorder, OCD, and eating disorders. She is known for taking on complex cases, especially for people who have tried other treatments without success.
Dr. Ansbro works to simplify medication rather than add to it. She pairs careful prescribing with therapy, integrative practices, and appointments long enough to actually talk.
She is a proud LGBTQ+ physician and advocate, and she speaks Spanish. She founded Cantera Psychiatry so that patients could get care built around who they are, not just what they were diagnosed with.
Erin Rifenburgh, MS, PMHNP
Erin Rifenburgh is a psychiatric mental health nurse practitioner whose path to psychiatry started with people, not prescriptions. He earned a bachelor's degree in psychology and a bachelor's degree in nursing from Texas A&M University-Corpus Christi, a master's in counseling from Texas A&M University-San Antonio, and his nurse practitioner training through Texas State University.
Before becoming a psych NP, Erin worked in community counseling, supported survivors of domestic abuse, and served as a case manager for people navigating serious mental health challenges. That front-line experience shapes how he shows up for patients today.
Outside of Cantera, Erin is a proud dad to three kids and enjoys spending quality time with his family.
Cantera’s Patient Support Team
Billing & Office Manager:
Jennifer Burrell
Patient Support Coordinators:
Joanna Jasso
Stefani Elizondo
Have a question? Our patient support team is here to help you schedule an appointment, complete your forms, understand our services, or learn more about our approach to holistic psychiatric wellness.