Crystal Oster, CNM
NPI 1578626651 · Advanced Practice Midwife · Santa Rosa, CA
Crystal Oster, CNM is a Advanced Practice Midwife provider in Santa Rosa, CA (NPI 1578626651).
Provider details
- NPI number
- 1578626651
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNM
- Sex
- Female
- Sole proprietor
- No
- License
- 713 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is Crystal Oster's NPI number?
- Crystal Oster's National Provider Identifier (NPI) is 1578626651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Crystal Oster's specialty?
- Crystal Oster is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Crystal Oster located?
- Crystal Oster's practice location on file with NPPES is 401 Bicentennial Way, Santa Rosa, CA 95403-2149.
- What is Crystal Oster's phone number?
- The practice phone number listed in the NPPES registry for Crystal Oster is (707) 571-4632.
- Is Crystal Oster's NPI active?
- Yes — Crystal Oster's NPI (1578626651) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.