Mariko Elizabeth Blumenfeld, FNP - Medicare Nurse Practitioner in San Leandro, CA

Mariko Elizabeth Blumenfeld, FNP is a medicare enrolled "Nurse Practitioner - Family" in San Leandro, California. Her current practice location is 13690 E 14th St Ste 200, San Leandro, California. You can reach out to her office (for appointments etc.) via phone at (510) 297-0550.

Mariko Elizabeth Blumenfeld is licensed to practice in California (license number 95006095) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1750820965.

Contact Information

Mariko Elizabeth Blumenfeld, FNP
13690 E 14th St Ste 200,
San Leandro, CA 94578-2584
(510) 297-0550
(510) 297-0558

Map and Direction




Provider's Profile

Full NameMariko Elizabeth Blumenfeld
GenderFemale
SpecialityNurse Practitioner - Family
Location13690 E 14th St Ste 200, San Leandro, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1750820965
  • Provider Enumeration Date: 02/21/2017
  • Last Update Date: 04/06/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 2769768449
  • Enrollment ID: I20170412000503

Medical Identifiers

Medical identifiers for Mariko Elizabeth Blumenfeld such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1750820965NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
163W00000XRegistered Nurse 95053145 (California)Secondary
363LF0000XNurse Practitioner - Family 95006095 (California)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mariko Elizabeth Blumenfeld allows following entities to bill medicare on her behalf.
Entity NameTri-valley Orthopedic And Sports Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184808156
PECOS PAC ID: 3577461151
Enrollment ID: O20031219000786
Entity NameEast Bay Hand Medical Center, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1003305236
PECOS PAC ID: 6608124284
Enrollment ID: O20180731000327

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mariko Elizabeth Blumenfeld is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mariko Elizabeth Blumenfeld, FNP
4626 Willow Rd,
Pleasanton, CA 94588-8517

Ph: (866) 623-7600
Mariko Elizabeth Blumenfeld, FNP
13690 E 14th St Ste 200,
San Leandro, CA 94578-2584

Ph: (510) 297-0550

Reviews and Comments


Nurse Practitioner Nurses in San Leandro, CA

Lisa Cung, NP
Nurse Practitioner
Medicare: Not Enrolled in Medicare
Practice Location: 2410 Merced St, San Leandro, CA 94577
Phone: 510-278-2700    Fax: 510-278-2772
Dr. Elizabeth Macera, N.P.
Nurse Practitioner
Medicare: Not Enrolled in Medicare
Practice Location: 2500 Merced St, San Leandro, CA 94577
Phone: 510-454-1000    Fax: 415-576-8899
Aiko Loo, RN, NP-C
Nurse Practitioner
Medicare: Accepting Medicare Assignments
Practice Location: 13939 E 14th St Ste 180, San Leandro, CA 94578
Phone: 510-263-3300    Fax: 510-263-3350
Angela Lynn Serpa, N.P.
Nurse Practitioner
Medicare: Medicare Enrolled
Practice Location: 2500 Merced St, San Leandro, CA 94577
Phone: 510-454-1000    Fax: 510-675-2153
Mrs. Erin Mary Crawford, N.P.
Nurse Practitioner
Medicare: Accepting Medicare Assignments
Practice Location: 2500 Merced St, San Leandro, CA 94577
Phone: 510-454-1000    
Sarah Archenbronn, FNP-BC
Nurse Practitioner
Medicare: Medicare Enrolled
Practice Location: 13855 E 14th St, San Leandro, CA 94578
Phone: 510-357-6500    
Karen Yurch Horn, NP
Nurse Practitioner
Medicare: Not Enrolled in Medicare
Practice Location: 2587 Merced St., San Leandro, CA 94577
Phone: 510-351-3553    Fax: 510-351-3585

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.