NPIMap

Individual provider Active NPI

John Fankhauser, M.D.

  • Family Medicine Physician
  • Ventura, CA
National Provider Identifier
1942363882
Registry record updated Nov 13, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
G74837 Issued in CA
Practice address
3291 Loma Vista Rd
Ventura, CA 93003-3099
Phone
(805) 652-6556
NPI assigned
Dec 19, 2006
Last updated
Nov 13, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 13, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X G74837 CA Primary

Addresses

Primary practice location

3291 Loma Vista Rd
Ventura, CA 93003-3099

Mailing address

3291 Loma Vista Rd
Ventura, CA 93003-3099
Phone (805) 652-6556

Other practice location 1

125 W Thousand Oaks Blvd Ste 200
Thousand Oaks, CA 91360-4459
Phone (805) 418-9100

Other practice location 2

1227 E Los Angeles Ave
Simi Valley, CA 93065-2871
Phone (805) 582-4000

Other practice location 3

2240 E Gonzales Rd Ste 110&120
Oxnard, CA 93036-8210
Phone (805) 981-5181

Other practice location 4

133 W Santa Clara St
Ventura, CA 93001-2543
Phone (805) 641-5600

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address john.fankhauser@ventura.cernerdirect.com Direct

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20080102000683 CA Practitioner - Family Practice 3072693035 Reassigns benefits to 1 organization

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
74837CAMDPharmacist
G74837CAMDFamily Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
County of Ventura CurrentSince Sep 7, 2025 Accepting new patients
Livingston Memorial Visiting Nurse Association PastSince Apr 1, 2019 Accepting new patients
Lawrence W. Chespak, M.D., a Prof Corp Past Accepting new patients

Locations

300 Hillmont Ave
Ventura, CA 93003
Phone (805) 652-6000

300 Hillmont Ave
Bldg 340
Ventura, CA 93003
Phone (805) 652-6100

Interoperability endpoints

  • Direct secure messaging: john.fankhauser@ventura.cernerdirect.com

Ownership & related parties

All facility ownership & control disclosures 8

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Livingston Memorial VnaVentura, CA, CCN 057040 Home health agency Corporate Director Apr 1, 2019
Livingston Memorial Vna HospiceVentura, CA, CCN 051517 Hospice Corporate Director Apr 1, 2019
Las Islas Family Medical Group NorthOxnard, CA, CCN 051183 Federally qualified health center Corporate Officer
W-2 Managing Employee		 May 1, 2025
May 1, 2025
Las Posas Family Medical GroupCamarillo, CA, CCN 051189 Federally qualified health center Corporate Officer May 1, 2024
Sierra Vista Family Medical ClinicSimi Valley, CA, CCN 051176 Federally qualified health center Corporate Officer
W-2 Managing Employee		 Jul 1, 2024
Jul 1, 2024
Santa Paula WestSanta Paula, CA, CCN 051178 Federally qualified health center Corporate Director
W-2 Managing Employee		 May 1, 2025
May 1, 2025
Mandalay Bay Womens & ChildrensOxnard, CA, CCN 051174 Federally qualified health center Corporate Officer
W-2 Managing Employee		 May 1, 2024
May 1, 2024
Las Islas Mobile Medical ClinicOxnard, CA, CCN 551131 Federally qualified health center Corporate Officer
W-2 Managing Employee		 May 1, 2024
May 1, 2024

Owned or controlled facilities with NPI records 8

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Organizations & group practices 4

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.

NPI Registry JSON

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

{
    "created_epoch": "1166486400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762992000000",
    "number": "1942363882",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3291 LOMA VISTA RD",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930033099",
            "telephone_number": "805-652-6556"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3291 LOMA VISTA RD",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930033099",
            "telephone_number": "805-652-6556"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "125 W Thousand Oaks Blvd Ste 200",
            "address_purpose": "LOCATION",
            "city": "Thousand Oaks",
            "state": "CA",
            "postal_code": "913604459",
            "country_code": "US",
            "telephone_number": "805-418-9100",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1227 E Los Angeles Ave",
            "address_purpose": "LOCATION",
            "city": "Simi Valley",
            "state": "CA",
            "postal_code": "930652871",
            "country_code": "US",
            "telephone_number": "805-582-4000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2240 E Gonzales Rd Ste 110&120",
            "address_purpose": "LOCATION",
            "city": "Oxnard",
            "state": "CA",
            "postal_code": "930368210",
            "country_code": "US",
            "telephone_number": "805-981-5181",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "133 W Santa Clara St",
            "address_purpose": "LOCATION",
            "city": "Ventura",
            "state": "CA",
            "postal_code": "930012543",
            "country_code": "US",
            "telephone_number": "805-641-5600",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "FANKHAUSER",
        "first_name": "JOHN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-12-19",
        "last_updated": "2025-11-13",
        "certification_date": "2025-11-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "G74837",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "john.fankhauser@ventura.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "Cerner Direct Secure Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Direct Information",
            "address_1": "3291 Loma Vista Rd",
            "city": "Ventura",
            "state": "CA",
            "country_code": "US",
            "postal_code": "930033099",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Ventura, CA

Sources for this page

Verify at the official NPI Registry.