Karen Yen Quan, MD, MS

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

A199635 Issued in CA

Practice address

101 The City Dr S BLDG 3
Orange, CA 92868-3201

Phone

(714) 456-5770

NPI assigned

Apr 4, 2023

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Master of Science

State licenses

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

{
    "created_epoch": "1680566400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786924800000",
    "number": "1023713450",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3800 W CHAPMAN AVE STE 500",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928681638",
            "telephone_number": "714-456-5770"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 THE CITY DR S BLDG 3",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928683201",
            "telephone_number": "714-456-5770"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3800 W Chapman Ave Ste 500",
            "address_purpose": "LOCATION",
            "city": "Orange",
            "state": "CA",
            "postal_code": "928681638",
            "country_code": "US",
            "telephone_number": "714-456-5770",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "23291 Mill Creek Dr Ste 200",
            "address_purpose": "LOCATION",
            "city": "Laguna Hills",
            "state": "CA",
            "postal_code": "926531631",
            "country_code": "US",
            "telephone_number": "949-458-2715",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "800 N Main St",
            "address_purpose": "LOCATION",
            "city": "Santa Ana",
            "state": "CA",
            "postal_code": "927013576",
            "country_code": "US",
            "telephone_number": "714-456-5770",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "QUAN",
        "first_name": "KAREN",
        "middle_name": "YEN",
        "name_prefix": "Dr.",
        "credential": "MD, MS",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-04-04",
        "last_updated": "2026-08-17",
        "certification_date": "2026-08-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "A199635",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Quadrant Ca Virtual Pediatric Medical Care PC
• Syeda Arshya Quadri, M.D.
• Quality Autism Services
• Quality Hearing 4 Less
• Derek Quan, RPH
• Lisa Quan, PHARM.D.
• Vincent W Quan, DC
• Lisa K Quane, MD
• Anh Thach Quang
• Esha Qudrat

• Psychiatry Physician in Orange, CA
• Providers in Orange, CA by specialty
• Psychiatry Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 17, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.