Physicians About Us St. Joseph Health – Sonoma has 800 physician partners contributing to the care of patients in our two hospitals, Santa Rosa Memorial Hospital and Petaluma Valley Hospital. As leaders in the medical field, our physicians utilize the very latest advances in treatment and technology to move each patient to the next stage of recovery swiftly. Physician Leaders act on behalf of the Board to uphold the By-laws and Rules & Regulations of the Medical Staff. 2016 – 2018 Santa Rosa Memorial Hospital Department & Committee Chairs 2016 – 2018 Petaluma Valley Hospital Department & Committee Chairs SRMH Physician ED Call Schedules are available through Amion. For technical assistance, visit their website. Contact Heike Van Nellen, Medical Staff Services, 707-547-5471, for additional information on access.