Individual provider Active NPI

Harris Ronald Fisk, MD PHD

  • Neurology Physician
  • Los Angeles, CA
National Provider Identifier
1386669190
Registry record updated Sep 6, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neurology PhysicianTaxonomy code 2084N0400X
License
G20300 Issued in CA
Practice address
8631 W 3Rd St
Suite 620E
Los Angeles, CA 90048-5901
Phone
(310) 657-0942
Fax
(310) 652-2499
NPI assigned
Jul 13, 2006
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 6, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Neurology Physician 2084N0400X G20300 CA Primary
Neurological Surgery Physician 207T00000X G20300 CA

Addresses

Primary practice location

8631 W 3Rd St
Suite 620E
Los Angeles, CA 90048-5901

Mailing address

8631 W 3Rd St
Suite 620-E
Los Angeles, CA 90048-5901
Phone (310) 657-0942

Other identifiers 1

IdentifierTypeStateIssuer
HG20300AMedicaidCA

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

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

NPI Registry JSON

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

{
    "created_epoch": "1152748800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788652800000",
    "number": "1386669190",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8631 W 3RD ST",
            "address_2": "SUITE 620-E",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900485901",
            "telephone_number": "310-657-0942",
            "fax_number": "310-652-2499"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8631 W 3RD ST",
            "address_2": "SUITE 620E",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900485901",
            "telephone_number": "310-657-0942",
            "fax_number": "310-652-2499"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FISK",
        "first_name": "HARRIS",
        "middle_name": "RONALD",
        "credential": "MD PHD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-07-13",
        "last_updated": "2026-09-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "CA",
            "license": "G20300",
            "primary": true
        },
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "CA",
            "license": "G20300",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "HG20300A",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Los Angeles, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 6, 2026; 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.