Active NPI
Margaret Maina, DNP, CRNP, FNP-BC
- Nurse Practitioner
- Walnut Creek, CA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nurse Practitioner
- License
- 95040723
- Practice address
- 1226 Rossmoor Pkwy
Walnut Creek, CA 94595-2538 - Phone
- (801) 215-9309
- NPI assigned
- Sep 2, 2025
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Nurse Practitioner | 363L00000X | 95040723 | CA | Primary |
| Family Nurse Practitioner | 363LF0000X | R236238 | MD |
Addresses
Primary practice location
1226 Rossmoor Pkwy
Walnut Creek, CA 94595-2538
Mailing address
12789 Castaic Lake Way
Rancho Cordova, CA 95742-8274
Phone (443) 889-4195
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MD, WA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: No
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Nurse Practitioner
- Education
- Other, 2024
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
1 Price Dr
Elkton, MD 21921-6731
Phone (443) 275-9164
33400 8TH Ave S
Suite 232
Federal Way, WA 98003-6382
Phone (253) 584-3577
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Nurse Practitioner
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| R236238 | MD | MD | Family Nurse Practitioner |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Endeavour Healthcare LLC | Current | Accepting new patients | |
| Mso Washington, Inc. | Nurse Practitioner | Current | Accepting new patients |
Locations
4669 Falls Rd
Baltimore, MD 21209
Phone (410) 662-8606
1 Price Dr
Elkton, MD 21921
Phone (410) 398-6474
1881 Telegraph Rd
Rising Sun, MD 21911
Phone (302) 290-3543
6600 Ridge Rd
Rosedale, MD 21237
Phone (410) 574-4950
33400 8th Ave S
Ste 232
Federal Way, WA 98003
4903 108th St SW
Tacoma, WA 98499
Phone (253) 584-3577
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Internal Medicine Physician
- Towson, MD
- NPI 1104555127
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1756771200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1786492800000",
"number": "1881574820",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "12789 CASTAIC LAKE WAY",
"city": "RANCHO CORDOVA",
"state": "CA",
"postal_code": "957428274",
"telephone_number": "443-889-4195"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1226 ROSSMOOR PKWY",
"city": "WALNUT CREEK",
"state": "CA",
"postal_code": "945952538",
"telephone_number": "801-215-9309"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MAINA",
"first_name": "MARGARET",
"credential": "DNP, CRNP, FNP-BC",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2025-09-02",
"last_updated": "2026-08-12",
"certification_date": "2026-08-12",
"status": "A"
},
"taxonomies": [
{
"code": "363L00000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner",
"state": "CA",
"license": "95040723",
"primary": true
},
{
"code": "363LF0000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner, Family",
"state": "MD",
"license": "R236238",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Walnut Creek, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 12, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.