Margaret Maina, DNP, CRNP, FNP-BC - Medicare Nurse Practitioner in Walnut Creek, CA

Margaret Maina, DNP, CRNP, FNP-BC is a medicare enrolled "Nurse Practitioner" in Walnut Creek, California. She graduated from nursing school in 2024 and has 2 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Endeavour Healthcare Llc, Mso Washington Inc and her current practice location is 1226 Rossmoor Pkwy, Walnut Creek, California. You can reach out to her office (for appointments etc.) via phone at (801) 215-9309.

Margaret Maina is licensed to practice in California (license number 95040723) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1881574820.

Contact Information

Margaret Maina, DNP, CRNP, FNP-BC
1226 Rossmoor Pkwy,
Walnut Creek, CA 94595-2538
(801) 215-9309
Not Available

Map and Direction




Provider's Profile

Full NameMargaret Maina
GenderFemale
SpecialityNurse Practitioner
Experience2 Years
Location1226 Rossmoor Pkwy, Walnut Creek, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Margaret Maina graduated from nursing school in 2024
  NPI Data:
  • NPI Number: 1881574820
  • Provider Enumeration Date: 09/02/2025
  • Last Update Date: 08/12/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 0941797195
  • Enrollment ID: I20251013002825

Medical Identifiers

Medical identifiers for Margaret Maina such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1881574820NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363L00000XNurse Practitioner 95040723 (California)Primary
363LF0000XNurse Practitioner - Family R236238 (Maryland)Secondary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Endeavour Healthcare Llc30729888158
Mso Washington Inc185029268114

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. Margaret Maina allows following entities to bill medicare on her behalf.
Entity NameEndeavour Healthcare LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104555127
PECOS PAC ID: 3072988815
Enrollment ID: O20230410002370

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. Margaret Maina 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
Margaret Maina, DNP, CRNP, FNP-BC
12789 Castaic Lake Way,
Rancho Cordova, CA 95742-8274

Ph: (443) 889-4195
Margaret Maina, DNP, CRNP, FNP-BC
1226 Rossmoor Pkwy,
Walnut Creek, CA 94595-2538

Ph: (801) 215-9309

Reviews and Comments


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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.