Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

MS. Nancy Ann O'Brien, CNM

Individual provider Midwife · NPI 1003084245

MS. Nancy Ann O'Brien, CNM is a Midwife in Rohnert Park, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
Specialties on file
2
What do these letters mean?
CNM — Certified Nurse-Midwife
An advanced practice nurse who provides prenatal care and delivers babies.

See every abbreviation used in this directory →

Practice location Address checks out

1370 Medical Center Dr
Rohnert Park, CA 94928-2934
Phone: (707) 584-3528
Fax: (707) 584-3924
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Midwife (primary) Taxonomy 176B00000X · Licence NMW 1327 (CA)
Midwife Taxonomy 176B00000X · Licence NMW1327 (CA)

Record details

NPI number1003084245
Entity typeIndividual (Type 1)
GenderFemale
Credentials CNM
Sole proprietorNo
NPI enumeratedFebruary 11, 2008
Last updated in NPPESFebruary 11, 2008