Individual provider Active NPI

Michael Thomas Guthrie, M.D.

  • Hospitalist Physician
  • Lancaster, CA
National Provider Identifier
1598875585
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
A51655 Issued in CA
Practice address
43839 15TH St W
Lancaster, CA 93534-4756
Phone
(661) 945-5984
Fax
(661) 723-6446
NPI assigned
Aug 30, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X A51655 CA
Hospitalist Physician 208M00000X A51655 CA Primary

Addresses

Primary practice location

43839 15TH St W
Lancaster, CA 93534-4756

Mailing address

1348 Las Canoas Rd
Pacific Palisades, CA 90272-2426
Phone (310) 230-0174

Other identifiers 1

IdentifierTypeStateIssuer
00A516550MedicaidCA

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

State licenses

LicenseStateTypeSpecialty
51655CAMDGeneral Practice Dentistry
A51655CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Lakeside Medical Associates, a Medical Group, Inc. Past Accepting new patients
Caremore Medical Group Internal Medicine Past Accepting new patients
Flintridge Physical Therapy PastSince Jan 2, 2022 Accepting new patients

Interoperability endpoints

  • Direct secure messaging: michael.guthrie.p1@direct.lakeside.nextgenshare.com

Organizations & group practices 3

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1156896000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1598875585",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1348 LAS CANOAS RD",
            "city": "PACIFIC PALISADES",
            "state": "CA",
            "postal_code": "902722426",
            "telephone_number": "310-230-0174"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "43839 15TH ST W",
            "city": "LANCASTER",
            "state": "CA",
            "postal_code": "935344756",
            "telephone_number": "661-945-5984",
            "fax_number": "661-723-6446"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUTHRIE",
        "first_name": "MICHAEL",
        "middle_name": "THOMAS",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-30",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A51655",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CA",
            "license": "A51655",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A516550",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Lancaster, CA

Sources for this page

  • 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.