Nolan Williams

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

A159440 Issued in CA

Practice address

1580 1St St
Napa, CA 94559-2841

Phone

(707) 258-8757

NPI assigned

Jul 22, 2013

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CA, PA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: nwilliams239646@santaclaravalley.direct-ci.net
• Direct secure messaging: nolan.williams@ventura.cernerdirect.com

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.

• Alameda Health System

  • Surgery Physician
  • Oakland, CA
  • NPI 1740332931
  Medicare reassignment NPD
• County of Humboldt

  • State or Local Public Health Clinic/Center
  • Eureka, CA
  • NPI 1871676213
  Medicare reassignment NPD
• County of Santa Clara

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • San Jose, CA
  • NPI 1699885079
  Medicare reassignment NPD
• County of Ventura

  • General Acute Care Hospital
  • Ventura, CA
  • NPI 1629167457
  Medicare reassignment NPD
• Traditions Psychiatry Group, P.C

  • Psychiatry Physician
  • Santa Rosa, CA
  • NPI 1083802979
  Medicare reassignment NPD
• Geisinger Clinic

  • Family Medicine Physician
  • Danville, PA
  • NPI 1366493868
  Medicare reassignment NPD
• Glenmaura Holdings, LLC

  • Psychiatric Hospital
  • Moosic, PA
  • NPI 1942914924
  Medicare reassignment NPD
• Alameda Health System

  • Federally Qualified Health Center (FQHC)
  • Newark, CA
  • NPI 1497956288
  NPD
• County of Humboldt

  • Community/Behavioral Health Agency
  • Eureka, CA
  • NPI 1033300306
  NPD
• County of Humboldt

  • Clinical Medical Laboratory
  • Eureka, CA
  • NPI 1689751687
  NPD
• County of Santa Clara

  • Clinic/Center
  • San Jose, CA
  • NPI 1073265914
  NPD
• County of Santa Clara

  • Pharmacy
  • San Jose, CA
  • NPI 1891871919
  NPD

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

{
    "created_epoch": "1374451200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763337600000",
    "number": "1811339641",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 412",
            "city": "GREEN MOUNTAIN FALLS",
            "state": "CO",
            "postal_code": "808190412",
            "telephone_number": "316-734-5280"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1580 1ST ST",
            "city": "NAPA",
            "state": "CA",
            "postal_code": "945592841",
            "telephone_number": "707-258-8757"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "200 Hillmont Ave",
            "address_purpose": "LOCATION",
            "city": "Ventura",
            "state": "CA",
            "postal_code": "930031647",
            "country_code": "US",
            "telephone_number": "805-652-6729",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "NOLAN",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-07-22",
        "last_updated": "2025-11-17",
        "certification_date": "2025-11-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "A159440",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "nolan.williams@ventura.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "Cerner Direct Secure Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Direct Information",
            "address_1": "200 Hillmont Ave",
            "city": "Ventura",
            "state": "CA",
            "country_code": "US",
            "postal_code": "930031647",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Kiana R Williams
• Maddisen Williams
• Mara Susan Williams
• Marc Christopher Williams
• Marietta Williams, MS, CCC-SLP
• Patti Elizabeth Williams, L.C.S.W.
• Phaedra Nicole Williams
• Rachael Williams
• Robert Jeffrey Williams, D.D.S.
• Sariyah Williams

• Psychiatry Physician in Napa, CA
• Providers in Napa, CA by specialty
• Psychiatry Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 17, 2025; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.