John Keith Weixler, NP

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

95018841 Issued in CA

Practice address

470 Chadbourne Rd Ste a
Fairfield, CA 94534-9620

Phone

(707) 419-8989

NPI assigned

Oct 14, 2021

Last updated

Sep 4, 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

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science, Nurse Practitioner

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jweixler676153@direct.ochin.org

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.

• Ole Health

  • Federally Qualified Health Center (FQHC)
  • Napa, CA
  • NPI 1700976503
  Medicare reassignment NPD
• Ole Health

  • Federally Qualified Health Center (FQHC)
  • Fairfield, CA
  • NPI 1245043165
  NPD
• Ole Health

  • Federally Qualified Health Center (FQHC)
  • Napa, CA
  • NPI 1609170695
  NPD
• Ole Health

  • Federally Qualified Health Center (FQHC)
  • Fairfield, CA
  • NPI 1497130280
  NPD (past)
• Ole Health

  dba CommuniCare OLE

  • Federally Qualified Health Center (FQHC)
  • Davis, CA
  • NPI 1558366823
  NPD (past)

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

{
    "created_epoch": "1634169600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756944000000",
    "number": "1699438820",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1141 PEAR TREE LN",
            "city": "NAPA",
            "state": "CA",
            "postal_code": "945586484",
            "telephone_number": "707-254-1770"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "470 CHADBOURNE RD STE A",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945349620",
            "telephone_number": "707-419-8989"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WEIXLER",
        "first_name": "JOHN",
        "middle_name": "KEITH",
        "credential": "NP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-10-14",
        "last_updated": "2025-09-04",
        "certification_date": "2025-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "CA",
            "license": "95018841",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• David Evans Webb, D.D.S.
• Jeffery S Webb, D.D.S.
• Lauren Weber, D.O.
• Lori Weisenburg
• Nicholas Weiss, AMFT
• Well Care of Estrell, LLC
• Wellness Care Center
• Kirsten Marie Wells
• Naesha Wells
• Alan C. Werblin, MD

• Psychiatric/Mental Health Nurse Practitioner in Fairfield, CA
• Providers in Fairfield, CA by specialty
• Psychiatric/Mental Health Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 4, 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.