William Duan, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

A189333 Issued in CA

Practice address

10333 El Camino Real
Atascadero, CA 93422-5808

Phone

(805) 468-2000

NPI assigned

Mar 31, 2022

Sex

Male

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

Specialty

Psychiatry

Education

Other, 2022

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: tourouniversitymedicalgroup.williamduan@155493.advancedmd-direct.com

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

{
    "created_epoch": "1648684800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786320000000",
    "number": "1881334308",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10333 EL CAMINO REAL",
            "city": "ATASCADERO",
            "state": "CA",
            "postal_code": "934225808",
            "telephone_number": "805-468-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10333 EL CAMINO REAL",
            "city": "ATASCADERO",
            "state": "CA",
            "postal_code": "934225808",
            "telephone_number": "805-468-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUAN",
        "first_name": "WILLIAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-03-31",
        "last_updated": "2026-08-10",
        "certification_date": "2026-08-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "A189333",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Courtney Dowd
• Jennifer Ann Drown, AMFT114345
• DRS. Chalker and Peterson, a Dental Partnership
• Drug and Alcohol Services
• DSH-Atascadero
• Dori Dueck, LMT
• Lindsay Duhn
• Yvette Duncan, LPT
• Jamie Noelle Dunn, LMFT
• Rachel Laetitia Duros, PHD

• Psychiatry Physician in Atascadero, CA
• Providers in Atascadero, 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 10, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.