Our Physicians

Dr. Mattar - Platinum Provider

Peter Mattar, M.D., MPH
Family Practice

Dr. Peter N Mattar is a Family Practice specialist in Riverside, California. He attended and graduated from Loma Linda University School Of Medicine in 2005, having over 15 years of diverse experience, especially in Family Practice. Dr. Peter N Mattar also cooperates with other doctors and physicians in medical groups including Citrus Valley Medical Associates. Dr. Mattar may accept Medicare Assignment.

John Agtuca -  Platinum Provider

John Agtuca, D.O.
Internal Medicine

Dr. John Agtuca, is a long time Southern California resident. He grew up in Anaheim. He attended college at the University of California Riverside, then attended medical school at Midwestern University in Glendale Arizona. From there, he kept moving east and ended up in Chicago Illinois, where he lived for 3 years and completed his residency training in Internal Medicine. After medical training, Dr. Agtuca move back to Southern California.

Nurse Practitioner

Doc Stevenson - Platinum Provider

Renanda Stevenson, DNP, FNP – BC
Family Practice

Dr. Renanda Stevenson has been practicing for 19 years throughout the Inland Empire, specializing in Family Practice, Women’s Health and Urgent Care.  As a Board Certified Family Nurse Practitioner, she provides integrated primary care services to individuals of all ages, promoting health awareness and disease prevention.  Dr. Stevenson believes that building trusting relationships with her patient’s is the foundation of quality care and improved health and she vehemently upholds her patient care philosophy to provide the same quality care to her patients that she expects to be provided to her family.