Dr. Luther Mangoba, MD
Family Physician
8133 Magnolia Ave
Riverside, CA 92504
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206 providers
Availability last updated 07/03/2026
Dr. Luther Mangoba, MD
Family Physician
8133 Magnolia Ave
Riverside, CA 92504
Born in the small rural ski resort town of Show Low, Arizona, Cristal Sumerlin is a dedicated Physician Assistant specializing in Internal Medicine. With a strong passion for patient care and a desire to play an active role in their treatment and well-being, she chose the professional career path of a Physician Assistant after working as an X-Ray Technician. Cristal fell in love with medicine and recognized the need to further her education to better serve her patients and the community.
Cristal takes great pride in both her personal and professional accomplishments. As a mother and military spouse, she has successfully balanced the demands of family life while pursuing her professional goals. Her commitment to her patients and dedication to her work make her a source of pride and inspiration.
In the field of Internal Medicine, Cristal's strengths lie in managing complex disease processes such as diabetes. Her previous experience as an orthopedic technician and x-ray tech in an orthopedic practice has also honed her skills in orthopedics. She finds fulfillment in working with patients facing orthopedic conditions and providing comprehensive care.
Beyond her career, Cristal enjoys spending time outdoors and engaging in activities such as camping, hiking, and traveling. She cherishes these moments with her friends and family, as they provide a source of rejuvenation and happiness outside of her job.
With her unwavering dedication, clinical expertise, and compassionate approach, Cristal Sumerlin is an invaluable asset to Dr. Richard Lam's office. She strives to make a positive impact on her patients' lives and is committed to providing comprehensive and personalized care to improve their overall well-being.
Cristal Sumerlin, PA-C
Physician Assistant
27994 Bradley Road
Suite C
Menifee, CA 92586
Yessenia Toscano, FNP-C, MSN, BSN, RN, is a dedicated nurse professional at Apple Urgent Care in Colton, Coachella, Moreno Valley, Hemet, Perris, Riverside, Indio, and San Bernardino, California.
Yessenia started her nursing education at Riverside City College in Riverside, California, earning an associate degree in nursing. While working as a clinical nurse at Riverside Community Hospital, Yessenia completed her Bachelor of Science in Nursing at California State University Fullerton in Fullerton, California.
Dedicated to advancing in her profession, Yessenia continued her education at Azusa Pacific University in Azusa, California, earning her Master of Science to become a family nurse practitioner. During her master’s program, Yessenia won the Outstanding Masters Nursing Student award.
Yessenia has several years of experience working as an acute care nurse and excels at delivering high-quality patient care as a nurse practitioner. She has experience in primary care, women’s health, pediatrics, psychosocial, and urgent care.
Urgent care, acute intensive care, and neurology are her favorite areas of medicine.
Yessenia is fluent in English and Spanish.
Outside of work, Yessenia enjoys gardening and spending time with her beautiful family.
Yessenia Toscano, FNP-C
Nurse Practitioner
1688 N. Perris Blvd
Suite F-4
Perris, CA 92571
Surya Reddy, MD
Family Physician
1688 N Perris Blvd, Ste G2
Perris, CA 92571
Dr. Wayne Dysinger, MD
Family Physician
Your Home
Riverside, CA 92506
Dr. Wayne Dysinger, MD
Family Physician
4368 Central Ave
Riverside, CA 92506
Dipika Pandit, MD
Family Physician
4368 Central Ave
Riverside, CA 92506
Dr. Yeyong Shin, DO
Family Physician
1111 Grand Ave.
Suite J
Diamond Bar, CA 91765
Born in the small rural ski resort town of Show Low, Arizona, Cristal Sumerlin is a dedicated Physician Assistant specializing in Internal Medicine. With a strong passion for patient care and a desire to play an active role in their treatment and well-being, she chose the professional career path of a Physician Assistant after working as an X-Ray Technician. Cristal fell in love with medicine and recognized the need to further her education to better serve her patients and the community.
Cristal takes great pride in both her personal and professional accomplishments. As a mother and military spouse, she has successfully balanced the demands of family life while pursuing her professional goals. Her commitment to her patients and dedication to her work make her a source of pride and inspiration.
In the field of Internal Medicine, Cristal's strengths lie in managing complex disease processes such as diabetes. Her previous experience as an orthopedic technician and x-ray tech in an orthopedic practice has also honed her skills in orthopedics. She finds fulfillment in working with patients facing orthopedic conditions and providing comprehensive care.
Beyond her career, Cristal enjoys spending time outdoors and engaging in activities such as camping, hiking, and traveling. She cherishes these moments with her friends and family, as they provide a source of rejuvenation and happiness outside of her job.
With her unwavering dedication, clinical expertise, and compassionate approach, Cristal Sumerlin is an invaluable asset to Dr. Richard Lam's office. She strives to make a positive impact on her patients' lives and is committed to providing comprehensive and personalized care to improve their overall well-being.
Cristal Sumerlin, PA-C
Physician Assistant
41900 Winchester Road
Suite 100
Temecula, CA 92590
Brittany Wertz, DO
Family Physician
5385 Walnut Ave
Unit 3
Chino, CA 91710
Dr. Luther Mangoba, MD
Family Physician
4768 Palm Avenue
Riverside, CA 92501
