NPPES file of Aug 9, 2026

Mariko Elizabeth Blumenfeld, FNP

Family Nurse Practitioner · San Leandro, CA

Mariko Elizabeth Blumenfeld, FNP is a family nurse practitioner with a practice address in San Leandro, California, and NPI 1750820965, issued on Feb 21, 2017. Check the license (California 95006095, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1750820965
Name
Mariko Elizabeth Blumenfeld
Credential
FNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
95006095 CA
95053145 CA
Self-reported in NPPES; status is on the state search
Practice location
13690 E 14TH St Ste 200, San Leandro, CA 94578
Phone
(510) 297-0550
Enumerated
Feb 21, 2017
Record last updated
Apr 6, 2022
Fax
(510) 297-0558
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →

Also registered at 13690 E 14TH St Ste 200

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jesse Dashe, M.D.Orthopaedic Hand Surgery Physician1487917423
  2. Andrew Goodrum, PA-CPhysician Assistant1245077577

Verify Mariko Elizabeth Blumenfeld in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 95006095    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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98% fewer Medicare Part D claims than the average family nurse practitioner in 2024

22 Medicare Part D claims for 14 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Mariko Blumenfeld22
  2. Specialty average1,305

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Mariko Elizabeth Blumenfeld among 16,966 family nurse practitioner records in California

Mariko Elizabeth Blumenfeld, FNP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 40% of them.

  • NPI issued2017 · 40% of these records are older, 55% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileNo · 40% of these records are
  • Record last updated2022 · 42% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Family Nurse Practitioner providers in California

There are 16,966 family nurse practitioner records in California.

All 16,966 in California → Every provider in San Leandro → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Lydia Andemariam, NPSan Leandro, CA 945781114736667
  2. Sarah Archenbronn, FNP-BCSan Leandro, CA 945781154664241
  3. Livier Bejinez, FNPAshland, CA 945781255882601
  4. Janice Cheung, FNP-CSan Leandro, CA 945781881031433
  5. Adam Ciccone, FNP-BCSan Leandro, CA 945781396337937
  6. Lilly Fung, NPSan Leandro, CA 945781548540727
  7. Alexandra Gray, MSN/MPH, FNP-CAshland, CA 945781124563309
  8. Belinda Jinks, FNPCSan Leandro, CA 945781073658340

Common questions

What is Mariko Elizabeth Blumenfeld, FNP's NPI number?

Mariko Elizabeth Blumenfeld, FNP's National Provider Identifier (NPI) is 1750820965, issued on Feb 21, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Mariko Elizabeth Blumenfeld, FNP located?

The NPPES record lists a practice address at 13690 E 14TH St Ste 200, San Leandro, CA, 94578. Phone: (510) 297-0550. Providers update this record themselves, so call before visiting.

How can I verify Mariko Elizabeth Blumenfeld, FNP's license?

NPPES lists California license number 95006095, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Mariko Elizabeth Blumenfeld, FNP prescribe under Medicare Part D?

In 2024, Mariko Elizabeth Blumenfeld, FNP had 22 Medicare Part D claims for 14 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.