OB-GYNs in Petaluma, CA
11 OB-GYNs listed in Petaluma: 1 practice or clinic and 10 OB-GYNs listed individually.
From the federal NPPES registry and CMS Doctors and Clinicians files, updated September 2026 (Doctors and Clinicians: August 2026). A hospital affiliation is one a physician reports to Medicare, not a promise they deliver there. Public records, not yet confirmed by each provider. How we build this directory
Yes Can Medicaid cover your pregnancy in California?Can Medicaid cover your pregnancy in California?
Medi-Cal covers pregnancy for incomes up to 213% of the federal poverty level (limits as of January 2026).
Hospital affiliations (4)
Hospitals the OB-GYNs listed here report an affiliation with to Medicare. That isn't a promise of where they deliver, so ask the practice. Petaluma has 1 hospital with labor and delivery in CMS data; see hospitals in California.
- Marinhealth Medical CenterGreenbrae, CANamed by 3 listings hereBirthing-Friendly
- Providence Santa Rosa Memorial HospitalSanta Rosa, CANamed by 3 listings hereBirthing-Friendly
- Petaluma Valley HospitalPetaluma, CANamed by 2 listings hereBirthing-Friendly
- California Pacific Medical Center- Van Ness CampusSan Francisco, CANamed by 1 listing hereBirthing-Friendly
Practices, clinics and hospitals (1)
Petaluma Health Center
Clinic or medical group · 1 OB-GYN registered here
OB-GYNs: Fiona Redwood
1179 N McDowell Blvd, Petaluma, CA 94954
(707) 559-7500OB-GYNs listed individually (10)
Shown by city and phone. The NPI registry lists no practice organization at their address; where Medicare data names their group practice, it's shown.
- Anthony Kosinski
Group practice: Providence Medical Foundation
Hospital affiliation (Medicare data): Petaluma Valley Hospital; Providence Santa Rosa Memorial Hospital
Medical school: University of Illinois College of Med, 1993
(707) 763-2900 Claim listing - Bonni Massa
Group practice: Regents University of California UCSF
Hospital affiliation (Medicare data): California Pacific Medical Center- Van Ness Campus; Marinhealth Medical Center
Medical school: Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University, 1997
(628) 336-5260 Claim listing - Caroline Barnhart
Group practice: Regents University of California UCSF
Hospital affiliation (Medicare data): Marinhealth Medical Center
Medical school: Temple University School of Medicine, 2019
(707) 765-3900 Claim listing - Elmira Manoucheri
Group practice: Permanente Medical Group
Medical school: University of Toledo College of Medicine, 2008
(707) 765-3900 Claim listing - Gamin Thomason (707) 765-3900 Claim listing
- Julie Clark
Group practice: Petaluma Health Center
Hospital affiliation (Medicare data): Petaluma Valley Hospital; Providence Santa Rosa Memorial Hospital
Medical school: New York Medical College, 2001
(707) 763-2900 Claim listing - Kellie Corcoran
Group practice: Permanente Medical Group
Medical school: University of California, Davis School of Medicine, 2015
(707) 765-3900 Claim listing - Laurie Dibble
Group practice: Providence Medical Foundation
Hospital affiliation (Medicare data): Providence Santa Rosa Memorial Hospital
Medical school: University of California, San Francisco School of Medicine, 1985
(707) 765-3900 Claim listing - Susan Taylor Peters
Group practice: Permanente Medical Group
Medical school: University of Louisville School of Medicine, 2000
(707) 765-3900 Claim listing - Tamar Segev
Group practice: Regents University of California UCSF
Hospital affiliation (Medicare data): Marinhealth Medical Center
(415) 461-7800 Claim listing
Frequently asked questions
How many OB-GYNs are in Petaluma, CA?
As of September 2026, the federal NPI registry lists 11 OB-GYNs in Petaluma, CA: 1 at 1 practices, clinics and hospitals, and 10 listed individually. 6 of the 11 listings report a hospital affiliation to Medicare.
Which OB-GYNs in Petaluma, CA take Medicaid?
The NPI registry doesn't record which insurance a practice takes, so we can't say which ones do. Call the office, or search your Medicaid plan's provider directory. Our California pregnancy Medicaid page has the income limits and how to apply.
Are these OB-GYNs accepting new patients?
The NPI registry doesn't say whether a practice is taking new patients, so call the office to check, and ask how far along you should be at the first prenatal visit.
Does a hospital affiliation mean the OB-GYN delivers there?
No. It's a hospital the physician reports to Medicare, through privileges or billing. Ask the practice which hospital its doctors deliver at.
Is an OB-GYN the same as a gynecologist?
An OB-GYN is trained in both obstetrics (pregnancy and birth) and gynecology. Some physicians practice gynecology only and don't provide pregnancy care; we leave out physicians whose main specialty in the NPI registry is gynecology only.
What care is listed in Petaluma, CA?
- In this directory, Petaluma, CA has 9 doulas, 5 lactation consultants, 4 midwives, 1 hospital with labor and delivery, 11 OB-GYNs and 7 pediatricians (NPI registry, September 2026; CMS hospital data, July 2026).
Which Birthing-Friendly hospitals are near Petaluma?
- Petaluma Valley Hospital Petaluma, CA about 7 miles
- Providence Santa Rosa Memorial Hospital Santa Rosa, CA about 15 miles
- Kaiser Foundation Hospital-Santa Rosa Santa Rosa, CA about 16 miles
Straight-line distance from the middle of Petaluma. The CMS Birthing-Friendly designation (July 2026) means a hospital reports taking part in a maternity care quality program; it isn't a rating.