Mariko Blumenfeld, FNP
NPI 1750820965 · Family Nurse Practitioner · San Leandro, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariko Blumenfeld, FNP is a Family Nurse Practitioner provider in San Leandro, CA (NPI 1750820965).
Provider details
- NPI number
- 1750820965
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95053145 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 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
- 2017-02-21
- Last updated
- 2022-04-06
- Certified
- 2022-04-06
Frequently asked questions
- What is Mariko Blumenfeld's NPI number?
- Mariko Blumenfeld's National Provider Identifier (NPI) is 1750820965, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariko Blumenfeld's specialty?
- Mariko Blumenfeld is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mariko Blumenfeld located?
- Mariko Blumenfeld's practice location on file with NPPES is 13690 E 14th St Ste 200, San Leandro, CA 94578-2584.
- What is Mariko Blumenfeld's phone number?
- The practice phone number listed in the NPPES registry for Mariko Blumenfeld is (510) 297-0550.
- Does Mariko Blumenfeld accept Medicare?
- Mariko Blumenfeld is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariko Blumenfeld's NPI active?
- Yes — Mariko Blumenfeld's NPI (1750820965) is active in the NPPES registry as of the last update on 2022-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.