Your Network for Comprehensive Care

Annadel Medical Group offers the community a diverse group of doctors representing primary and specialty care. From preventive care to special programs for patients with chronic conditions, we have you covered. Our doctors specialize in internal medicine, pediatrics, neonatal care (newborn care), hospital medicine and more.

Annadel Medical Group is supported by St. Joseph Health System-Sonoma County. Our doctors are all active staff members at Santa Rosa Memorial Hospital and Petaluma Valley Hospital. As our patient, you have access to some of the best hospital care available in the area.  Request an appointment here, or click on one of our doctors below for more information.

Pediatrics:

• Deborah Britt, MD
• Elizabeth Culhane, MD
• Heather Iezza, MD
• Kenneth Prosser, MD
• David Smith, MD
• Mary Pat Degagne, RN, PNP
• Donna Lynn Jones, RN, FNP, PNP
• Linda Wayman, RN, PNP

Internal Medicine:

• Eki Abrams, MD 
• George Bisbee, MD
• Catherine Davis, MD
• Marlon DeCastro, MD
• Rajesh Ranadive, MD
  
• Rajina Ranadive, MD
  
• Robert Schaefer, MD 
• Noel Serrano, MD
• Patricia Baker-Bordiga, PA-C, FNP

Family Practice:

• Herbert Brosbe, MD
• James DeVore, MD
• Gary Greensweig, DO
• Cynthia Morris, MD
• David Sisler, MD
• Jenny Marie N. Sullivan, MD
• Paul Umino, MD
• Eleanor McLaughlin, FNP
• Ellen Roche, RN, FNP

Hospice & Palliative Medicine:

• Gary Johanson, MD

Physical Medicine & Rehabilitation:

• Danny Arzanipour, MD

General Surgery:

• David Russell, MD

Hospitalists:

• Jon-Michael (JM) Castelli, MD
• Attila Mady, MD
• Rachel Marek, MD
• Grace Martin, MD
• Andrew Min, MD
• Brenna Yard, MD