The Simms/Mann - UCLA Center for Integrative Oncology is part of UCLA's Jonsson Comprehensive Cancer Center and UCLA Oncology. To find out more about research opportunities and medical oncology care, please visit these sites.


Phone: (310) 794-6644 Fax: (310) 794-9615
Mon - Fri: 8:00AM - 5:00PM Sat - Sun: Closed

Esteisy Rivera

Esteisy Rivera

Administrative Assistant


As the initial contact for patients at Simms/Mann UCLA Center for Integrative Oncology, my goal is to welcome and introduce our center in a comforting manner. My job is to educate and inform the patients that have been touched by cancer of the services that are available to them to better their overall well-being.


I graduated from CSUN with a B.S. in Health Administration. I originally began studying Radiologic Sciences. While interning at Providence Tarzana Medical Center in the Surgical Unit, I realized I wanted more interaction with patients and really enjoyed being part of a health care team that provided whole-person care and support. Working at the Center has reinforced how much I value providing high-quality patient care and I will be going back to school to become a social worker.

Professional Work

Before joining Simms/Mann, I worked at the UCLA Gonda-Goldschmied Vascular Surgery Clinic scheduling surgeries for the participating nine surgeons. I also previously worked at Health Advocates, LLC; as a Case manager I provided education to help guide patients through the health care system.

Personal Perspectives & Personal Interest

I feel privileged to be a part of such a powerful team, making a significant positive impact for cancer patients and their families. When I’m not working I spend as much time with my family finding new group activities. I also love going latin dancing, trying new foods, and binge-watching the next best show.

Contact us for more information or book an appointment