Douglas Logan Williamson, DNP

Primary specialty

Psychiatric/Mental Health Registered NurseTaxonomy code 163WP0808X

License

NP95016180 Issued in CA

Practice address

1304 Ella St Ste B
San Luis Obispo, CA 93401-4166

Phone

(805) 541-6000

Fax

(805) 541-6001

NPI assigned

Dec 9, 2020

Last updated

Mar 20, 2025By the provider in NPPES

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

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Pacific Psychiatry Inc., a Professional Medical CorporationGroup PAC ID 2769749597, 6 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: douglas.williamson.1@23821.direct.athenahealth.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Pacific Psychiatry Inc., a Professional Medical Corporation

  dba Pacific Psychiatry,Inc.

  • Psychiatry Physician
  • San Luis Obispo, CA
  • NPI 1902317472
  Medicare reassignment Care Compare group
• Pathways to Wellness

  dba Hhi

  • Community/Behavioral Health Agency
  • Pleasanton, CA
  • NPI 1689025835
  NPD (past)
• Pathways to Wellness

  • Community/Behavioral Health Agency
  • Pleasanton, CA
  • NPI 1922551498
  NPD (past)

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

{
    "created_epoch": "1607472000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1742428800000",
    "number": "1386240844",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1304 ELLA ST STE B",
            "city": "SAN LUIS OBISPO",
            "state": "CA",
            "postal_code": "934014166",
            "telephone_number": "805-541-6000",
            "fax_number": "805-541-6001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1304 ELLA ST STE B",
            "city": "SAN LUIS OBISPO",
            "state": "CA",
            "postal_code": "934014166",
            "telephone_number": "805-541-6000",
            "fax_number": "805-541-6001"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "DOUGLAS",
        "middle_name": "LOGAN",
        "name_prefix": "Dr.",
        "credential": "DNP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-12-09",
        "last_updated": "2025-03-20",
        "certification_date": "2025-03-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163WP0808X",
            "taxonomy_group": "",
            "desc": "Registered Nurse, Psychiatric/Mental Health",
            "state": "CA",
            "license": "NP95016180",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Rachel Eulenberg Williams, DDS
• Savannah Alysse Williams, LPT
• Tyler Williams, LCSW 85329
• Cassandra Lynn Williamson, RDHAP
• Denise Carolyn Williamson I, LMFT
• Eric Williamson, DDS
• Heather Marie Willis, MPAP, PA-C
• Haley Nicole Willment, M.A. CCC-SLP
• Wilshire Community Services
• Wilshire Community Services

• Psychiatric/Mental Health Registered Nurse in San Luis Obispo, CA
• Providers in San Luis Obispo, CA by specialty
• Psychiatric/Mental Health Registered Nurse in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 20, 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.
• 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.

Verify at the official NPI Registry.