Dr. Maruja Diaz Arjonilla, MD is a diabetes & metabolism endocrinologist in Santa Ana, CA and has over 33 years of experience in the medical field. Dr. Diaz Arjonilla has extensive experience in Osteoporosis & Screening and Thyroid Disorders. She graduated from Universidad Central De Venezuela--Jose Maria Vargas, Escuela De Medicina Jose Maria Vargas in 1990. She is affiliated with Providence St. Joseph Hospital Orange. She is accepting new patients and telehealth appointments.