David Yoonseok Ahn, DMD

Primary specialty

Oral and Maxillofacial Surgery (Dentist)Taxonomy code 1223S0112X

License

104284 Issued in CA

Practice address

4150 Clement St
San Francisco, CA 94121-1563

Phone

(415) 221-4810

NPI assigned

Aug 14, 2013

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

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: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

State licenses

Interoperability endpoints

• Direct secure messaging: dahn691023@hisp.ehr.sutterhealth.org

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

{
    "created_epoch": "1376438400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780444800000",
    "number": "1265865216",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4150 CLEMENT ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941211563",
            "telephone_number": "415-221-4810"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4150 CLEMENT ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941211563",
            "telephone_number": "415-221-4810"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "AHN",
        "first_name": "DAVID",
        "middle_name": "YOONSEOK",
        "name_prefix": "Dr.",
        "credential": "DMD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-08-14",
        "last_updated": "2026-06-03",
        "certification_date": "2026-06-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223S0112X",
            "taxonomy_group": "",
            "desc": "Dentist, Oral and Maxillofacial Surgery",
            "state": "CA",
            "license": "104284",
            "primary": true
        },
        {
            "code": "1223G0001X",
            "taxonomy_group": "",
            "desc": "Dentist, General Practice",
            "state": "CA",
            "license": "104284",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mohammed Osman Ahmed, MD
• Mohd Ahmed
• Sabi Ahmed, M.D.
• Sarah Ahmed
• Shalla Ahmed, MSN, RN, AGNP
• Grace Gyungah Ahn, M.D.
• Jiyong Ahn
• Justin Ahn, M.D.
• Seoiyoung Ahn, MD, MS
• Trevor Maxwell Ahrendt, M.A.

• Oral and Maxillofacial Surgery (Dentist) in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Oral and Maxillofacial Surgery (Dentist) in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 3, 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.