Individual provider Active NPI

Mary Margaret Williams, RN

  • Psychiatric/Mental Health Registered Nurse
  • Roseville, CA
National Provider Identifier
1659459121
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Psychiatric/Mental Health Registered NurseTaxonomy code 163WP0808X
License
P249 Issued in CA
Practice address
219 Estates Dr
Ste #101
Roseville, CA 95678-2391
Phone
(916) 784-3555
NPI assigned
Nov 1, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Registered Nurse 163W00000X 200960 CA
Psychiatric/Mental Health Registered Nurse 163WP0808X P249 CA Primary

Addresses

Primary practice location

219 Estates Dr
Ste #101
Roseville, CA 95678-2391

Mailing address

412 Roundtree CT
Sacramento, CA 95831-2851
Phone (916) 393-0568

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Registered Nurse

State licenses

LicenseStateTypeSpecialty
200960CAMDRegistered Nurse
P249CAMDPsychiatric/Mental Health Registered Nurse

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1162339200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1659459121",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "412 ROUNDTREE CT",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958312851",
            "telephone_number": "916-393-0568"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "219 ESTATES DR",
            "address_2": "STE #101",
            "city": "ROSEVILLE",
            "state": "CA",
            "postal_code": "956782391",
            "telephone_number": "916-784-3555"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "MARY",
        "middle_name": "MARGARET",
        "credential": "RN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-11-01",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "CA",
            "license": "200960",
            "primary": false
        },
        {
            "code": "163WP0808X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Psychiatric/Mental Health",
            "state": "CA",
            "license": "P249",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Roseville, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.