Mary Claassen, CNM
NPI 1881938892 · Advanced Practice Midwife · Los Angeles, CA
Enrolled with Medicare as Practitioner - Certified Nurse Midwife (cnm) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Claassen, CNM is a Advanced Practice Midwife provider in Los Angeles, CA (NPI 1881938892).
Provider details
- NPI number
- 1881938892
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNM
- Sex
- Female
- Sole proprietor
- Yes
- License
- 2017 (CA)
Specialties & taxonomies
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
13 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
- 2012-11-15
- Last updated
- 2021-03-23
- Certified
- 2021-03-23
Frequently asked questions
- What is Mary Claassen's NPI number?
- Mary Claassen's National Provider Identifier (NPI) is 1881938892, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Claassen's specialty?
- Mary Claassen is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Claassen located?
- Mary Claassen's practice location on file with NPPES is 1530 S Olive St, Los Angeles, CA 90015-3023.
- What is Mary Claassen's phone number?
- The practice phone number listed in the NPPES registry for Mary Claassen is (213) 747-6642.
- Does Mary Claassen accept Medicare?
- Mary Claassen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Claassen's NPI active?
- Yes — Mary Claassen's NPI (1881938892) is active in the NPPES registry as of the last update on 2021-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.