John Y Hess MD a Medical Corporation

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

G32627 Issued in CA

Legal business name

JOHN Y HESS MD A MEDICAL CORPORATION

Practice address

2220 Lynn Rd
Suite 203
Thousand Oaks, CA 91360-1904

Phone

(805) 494-9494

Fax

(805) 374-9994

NPI assigned

Aug 31, 2006

Organization subpart

No

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

Authorized official

Name

Ms. Debra L. Williams

Title

Business Manager

Phone

(805) 494-9494

Specialties & licenses 1

Addresses

Other names 1

• JOHN Y. HESS, M.D., A MEDICAL CORPORATION Former legal business name

Locations

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

{
    "created_epoch": "1156982400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1780796151",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2220 LYNN RD",
            "address_2": "SUITE 201",
            "city": "THOUSAND OAKS",
            "state": "CA",
            "postal_code": "913601904",
            "telephone_number": "805-494-9494",
            "fax_number": "805-374-9994"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2220 LYNN RD",
            "address_2": "SUITE 203",
            "city": "THOUSAND OAKS",
            "state": "CA",
            "postal_code": "913601904",
            "telephone_number": "805-494-9494",
            "fax_number": "805-374-9994"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "JOHN Y HESS MD A MEDICAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-08-31",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "WILLIAMS",
        "authorized_official_first_name": "DEBRA",
        "authorized_official_middle_name": "L.",
        "authorized_official_title_or_position": "BUSINESS MANAGER",
        "authorized_official_telephone_number": "805-494-9494",
        "authorized_official_name_prefix": "Ms."
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "CA",
            "license": "G32627",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "JOHN Y. HESS, M.D., A MEDICAL CORPORATION",
            "code": "4",
            "type": "Former Legal Business Name"
        }
    ]
}

• Manraj Jaswir Singh Johal
• Johanna Jones
• Charles Toshimichi Johansen
• John D. Matrisciano MD Inc
• John M Delgado MD Inc
• Melissa M Johns, PT
• Amanda Johnson
• Charles P Johnson, M.D.
• Gregory H Johnson, MD
• Haylie Johnson

• Cardiovascular Disease Physician in Thousand Oaks, CA
• Providers in Thousand Oaks, CA by specialty
• Cardiovascular Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.