Individual provider Active NPI

Robert J Lock, MD

  • Cardiovascular Disease Physician
  • Eureka, CA
National Provider Identifier
1821079393
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Cardiovascular Disease PhysicianTaxonomy code 207RC0000X
License
G51176 Issued in CA
Practice address
2535 Harrison Avenue
Eureka, CA 95501-3220
Phone
(707) 268-8718
Fax
(707) 268-8008
NPI assigned
Nov 10, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Cardiovascular Disease Physician 207RC0000X G51176 CA Primary

Addresses

Primary practice location

2535 Harrison Avenue
Eureka, CA 95501-3220

Mailing address

2535 Harrison Ave
Eureka, CA 95501-3220
Phone (707) 268-8718

Other identifiers 1

IdentifierTypeStateIssuer
00G511760MedicaidCA

Medicare participation

Medicare enrollment files
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: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20100929001405 CA Practitioner - Cardiovascular Disease (Cardiology)Practitioner - Internal MedicinePractitioner - Interventional Cardiology 7416073226 Practice locations: Eureka, CA

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
G51176CAMDCardiovascular Disease Physician

NPI Registry JSON

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

{
    "created_epoch": "1131580800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1821079393",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2535 HARRISON AVE",
            "city": "EUREKA",
            "state": "CA",
            "postal_code": "955013220",
            "telephone_number": "707-268-8718",
            "fax_number": "707-268-8008"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2535 HARRISON AVENUE",
            "city": "EUREKA",
            "state": "CA",
            "postal_code": "955013220",
            "telephone_number": "707-268-8718",
            "fax_number": "707-268-8008"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LOCK",
        "first_name": "ROBERT",
        "middle_name": "J",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-10",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "CA",
            "license": "G51176",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G511760",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Eureka, CA

Sources for this page

Verify at the official NPI Registry.