NPIMap

Individual provider Active NPI

Katherine Elizabeth Wagner, MD

  • Neurological Surgery Physician
  • Ventura, CA
National Provider Identifier
1093125478
Registry record updated Apr 6, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neurological Surgery PhysicianTaxonomy code 207T00000X
License
A171941 Issued in CA
Practice address
168 N Brent St Ste 408
Ventura, CA 93003-2824
Phone
(617) 281-5273
Fax
(805) 643-0672
NPI assigned
May 6, 2014
Last updated
Apr 6, 2026By the provider in NPPES
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Apr 6, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Neurological Surgery Physician 207T00000X A171941 CA Primary

Addresses

Primary practice location

168 N Brent St Ste 408
Ventura, CA 93003-2824

Mailing address

168 N Brent St Ste 408
Ventura, CA 93003-2824
Phone (617) 281-5273

Other practice location 1

300 Hillmont Ave
Ventura, CA 93003-1651
Phone (805) 652-6000

Other practice location 2

825 N 10th St
Santa Paula, CA 93060-1309
Phone (805) 933-8650

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address katherine.wagner@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
I20210608003502 CA Practitioner - Neurosurgery 2961747266 Reassigns benefits to 6 organizations

Care Compare profile

Medicare Care Compare
Specialty
Neurosurgery
Education
Rutgers New Jersey Medical School, 2014
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
David L. Westra, MD, a Professional CorporationGroup PAC ID 5496909988, 2 clinicians
County of VenturaGroup PAC ID 7911810171, 340 clinicians

Practice addresses (Care Compare)

168 N Brent St
Suite 408
Ventura, CA 93003-2824
Phone 80564321794

300 Hillmont Ave
Ventura, CA 93003-1651

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Spinal fusion67
Laminectomy or laminotomy (partial removal of spine bones)36

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
A171941CAMDNeurological Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
County of Santa Clara CurrentSince Jul 19, 2021 Accepting new patients
David L. Westra, MD, a Professional Corporation Neurological Surgery CurrentSince Aug 1, 2022 Accepting new patients
County of Santa Clara CurrentSince Jul 19, 2021 Accepting new patients
County of Santa Clara Neurological Surgery Current Accepting new patients
County of Ventura CurrentSince Nov 29, 2024 Accepting new patients
County of Ventura Current Accepting new patients
County of Santa Clara CurrentSince Jul 19, 2021 Accepting new patients
County of Santa Clara Current Accepting new patients
Katherine E. Wagner, MD, a Professional Corporation Neurological Surgery CurrentSince Aug 7, 2025 Accepting new patients
County of Santa Clara CurrentSince Jul 19, 2021 Accepting new patients
County of Ventura CurrentSince Nov 29, 2024 Accepting new patients

Locations

7475 Camino Arroyo
Gilroy, CA 95020
Phone (408) 852-2400

1993 McKee Rd
San Jose, CA 95116
Phone (408) 254-6320

1996 Lundy Ave
San Jose, CA 95131
Phone (408) 299-5846

2101 Alexian Dr
San Jose, CA 95116
Phone (408) 272-6050

500 Tully Rd
San Jose, CA 95111
Phone (408) 817-1433

750 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-2320

751 S Bascom Ave
San Jose, CA 95128
Phone (408) 885-5110

825 N 10th St
Santa Paula, CA 93060
Phone (805) 933-8600

300 Pasteur Dr
Stanford, CA 94305
Phone (650) 498-5710

660 S Fair Oaks Ave
Sunnyvale, CA 94086
Phone (408) 885-7366

168 N Brent St
Ste 408
Ventura, CA 93003
Phone (805) 643-2179

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

300 Hillmont Ave
Ste 401
Ventura, CA 93003
Phone (805) 648-9830

800 S Victoria Ave
#L4640
Ventura, CA 93009

Interoperability endpoints

  • FHIR API: https://fhir4.healow.com/fhir/r4/IBDHDD/Endpoint/IBDHDD
  • Direct secure messaging: katherine.wagner@ventura.cernerdirect.com

Organizations & group practices 11

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.

Hospital & facility affiliations 13

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

View all 13

NPI Registry JSON

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

{
    "created_epoch": "1399334400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775433600000",
    "number": "1093125478",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "168 N BRENT ST STE 408",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930032824",
            "telephone_number": "617-281-5273",
            "fax_number": "805-643-0672"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "168 N BRENT ST STE 408",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930032824",
            "telephone_number": "617-281-5273",
            "fax_number": "805-643-0672"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "300 Hillmont Ave",
            "address_purpose": "LOCATION",
            "city": "Ventura",
            "state": "CA",
            "postal_code": "930031651",
            "country_code": "US",
            "telephone_number": "805-652-6000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "825 N 10th St",
            "address_purpose": "LOCATION",
            "city": "Santa Paula",
            "state": "CA",
            "postal_code": "930601309",
            "country_code": "US",
            "telephone_number": "805-933-8650",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WAGNER",
        "first_name": "KATHERINE",
        "middle_name": "ELIZABETH",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2014-05-06",
        "last_updated": "2026-04-06",
        "certification_date": "2026-04-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "CA",
            "license": "A171941",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "katherine.wagner@ventura.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "Cerner Direct Secure Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Direct Information",
            "address_1": "825 N 10th St",
            "city": "Santa Paula",
            "state": "CA",
            "country_code": "US",
            "postal_code": "930601309",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Ventura, CA

Sources for this page

Verify at the official NPI Registry.