Nancy O'brien, CNM
Nancy O'brien, CNM is a provider specialising in Midwife in Rohnert Park, CA, registered under NPI 1003084245.
Getting there
Here is what surrounds this office in Rohnert Park, based on OpenStreetMap data collected Aug 31, 2026. Parking is available about 0.42 mi away. The nearest transit stop is 752 ft away, served by Rohnert Park Expressway & Snyder Ln.
Getting here and what is nearby
Transit Snyder Ln & Rohnert Park Expresway 699 ft ~3 min
Transit Rohnert Park Expressway & Snyder Ln 734 ft ~3 min
Transit Rohnert Park Expressway & Snyder Ln 752 ft ~3 min
Parking Sunrise Park Parking Lot 779 ft ~3 min
Parking 0.37 mi ~8 min
Parking 0.42 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| NMW 1327 | CA | Midwife primary |
| NMW1327 | CA | Midwife |
This provider holds licence NMW 1327 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Midwife covers
A Midwife is a trained professional with special expertise in supporting women to maintain a healthy pregnancy birth, offering expert individualized care, education, counseling, and support to a woman and her newborn throughout the childbearing cycle. A Midwife is a skilled and independent practitioner who has undergone formalized training. Midwives are not required to be nurses and may be trained via multiple routes of education (apprenticeship, workshop, formal classes, or programs, etc., usually a combination). The educational background requirements and licensing requirements vary by state. The Midwife may or may not be certified by a state or national organization. NUCC Health Care Provider Taxonomy, code 176B00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 176B00000X | Midwife | NMW 1327 | CA | primary |
| 176B00000X | Midwife | NMW1327 | CA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003084245 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 11, 2008 |
| Last updated | Feb 11, 2008 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | CNM |
| Practice address |
1370 MEDICAL CENTER DR Rohnert Park, CA 94928 (707) 584-3528 Fax (707) 584-3924 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 0 | 8 | 4 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 8 | 8 | 2 | 8 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.