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93 providers
Availability last updated 08/05/2026
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
Dr. Patricia Guevara-Channell, MD
Family Physician
8008 Haven Ave Ste 100
Suite 100
Rancho Cucamonga, CA 91730
With an extensive and diverse background across multiple fields of nursing, Zohra Damawand, brings a wealth of clinical expertise and a multifaceted perspective to patient care. Currently serving as a Certified Nurse Practitioner, Zohra, leverages years of hands-on experience to deliver high-quality, evidence-based interventions tailored to the unique needs of every patient.
With a commitment to care excellence, she applies a comprehensive approach to diagnosis and treatment, and delivers informed care, tailored to patients’ needs and preferences. She is driven by a patient-centered philosophy of medical care. Her goal is to improve patient outcomes, advance primary care access, foster patient education, and personalize care plans, by combining technical proficiency with a compassionate, patient-centered philosophy.
Zohra Damawand, FNP
Nurse Practitioner
1701 E. Florida Ave
Hemet, CA 92544
Excellence is at the heart of the care that Marcella Bonnici, MD provides for each of her patients at her aesthetics and family medicine practice serving Wildomar, Murrieta, Temecula, CA, and the surrounding areas.
From her days as an undergraduate student to the moment she chose to return to her California roots, Dr. Bonnici has demonstrated a commitment to learning more about preventive care and family medicine, using that knowledge to improve her patient’s quality of life.
After earning her Bachelor of Science in biological sciences at the University of California, Irvine, Dr. Bonnici completed her medical studies at the historic Ross University School of Medicine. She later trained at several hospitals throughout the boroughs of New York City. She went on to receive the Outstanding Second Year Resident Award and was nominated for the Arizona Academy of Family Physicians Brazie Award while she was a resident at Scottsdale Healthcare.
Dr. Bonnici’s love of family medicine and her interest in preventive care inspired her to open her first practice in Scottsdale, Arizona. Motivated by her love of her native California, she returned to her home state to help her fellow Californians lead healthy lives.
Dr. Marcella Bonnici, MD
Family Physician
36320 Inland Valley Drive
Suite 201
Wildomar, CA 92592
Jose Ramos, MD
Family Physician
1770 N Orange Grove Ave #101
Pomona, CA 91767
Erasto Gutierrez, MD
Family Physician
1749 N Garey Ave
Pomona, CA 91767
Sergio Gomez, MD
Family Physician
2055 N Garey Ave
Pomona, CA 91767
Joanna Ayala, MD, is a board-certified physician with over a decade of experience in family medicine. She proudly leads the team at Murrieta Primary Care Clinic in Murrieta, California.
Dr. Ayala earned her medical degree from the University of Guadalajara School of Medicine in Jalisco’s capital city of Guadalajara in Mexico. She served the community of Guadalajara for four years before completing a three-year residency in family medicine at the University of Texas Health Science Center in Houston.
After completing her residency in 2011, Dr. Ayala gained experience practicing in Texas and New Mexico. She moved to Southern California in 2017 and established Murrieta Primary Care Clinic.
Dr. Ayala is proud to offer comprehensive health care services to adults and children over the age of 5. The team takes an open, personalized approach to wellness. Dr. Ayala specializes in primary care and managing chronic conditions, while also offering skin treatments and the latest cosmetic services.
To better serve the Murrieta, California, community, Dr. Ayala is fluent in Spanish and English. She is affiliated with Temecula Valley Hospital in California and prioritizes patient comfort at every stage of the health care journey.
Schedule a consultation online or on the phone to meet Dr. Ayala and the team at Murrieta Primary Care Clinic.
Dr. Joanna Ayala, MD
Family Physician
29995 Technology Drive
Suite 200
Murrieta, CA 92563
