Dr. Elpidio C. Mariano is a general surgeon in Petaluma, California and is affiliated with multiple hospitals in the area, including Petaluma Valley Hospital and Sonoma Valley Hospital. He received his medical degree from University of Santo Tomas and has been in practice for more than 20 years. Dr. Elpidio C. Mariano accepts Medicare, Aetna, Blue Cross, United Healthcare - see other insurance plans accepted.