Vanguard Clinical Oversight, a Medical Corporation

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

Legal business name

VANGUARD CLINICAL OVERSIGHT, A MEDICAL CORPORATION

Practice address

3572 Northranch Way
Granite Bay, CA 95661-5973

Phone

(509) 730-4720

Fax

(509) 331-7054

NPI assigned

Mar 23, 2026

Organization subpart

No

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

Authorized official

Name

Dr. Mark Y Liu, DONPI 1710967914

Title

Owner/President

Phone

(509) 730-4720

Specialties & licenses 1

Addresses

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Mark Yeejen Liu, DO

  • Family Medicine Physician
  • Rocklin, CA
  • NPI 1710967914
  NPD Authorized official

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

{
    "created_epoch": "1774224000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1774224000000",
    "number": "1669310397",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6644 LONETREE BLVD STE 300",
            "city": "ROCKLIN",
            "state": "CA",
            "postal_code": "957654432",
            "telephone_number": "509-730-4720"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3572 NORTHRANCH WAY",
            "city": "GRANITE BAY",
            "state": "CA",
            "postal_code": "956615973",
            "telephone_number": "509-730-4720",
            "fax_number": "509-331-7054"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "VANGUARD CLINICAL OVERSIGHT, A MEDICAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-03-23",
        "last_updated": "2026-03-23",
        "certification_date": "2026-03-23",
        "status": "A",
        "authorized_official_last_name": "LIU",
        "authorized_official_first_name": "MARK",
        "authorized_official_middle_name": "Y",
        "authorized_official_title_or_position": "OWNER/PRESIDENT",
        "authorized_official_telephone_number": "509-730-4720",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "DO"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Family Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sierra Michelle Tsygankov
• Lindsey Turner
• Amy Aong Vang
• Chua Vang
• Toua Vang
• Diana E Vargas Gonzalez
• Leah Verceles
• Robert Villani
• Virtuoso Psychiatry Group
• Vivid Lumiere, a Medical Corporation

• Family Medicine Physician in Granite Bay, CA
• Providers in Granite Bay, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 23, 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.