Samuel Yejin Chang

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA68670 Issued in CA

Practice address

1310 Club Dr
Vallejo, CA 94592-1187

Phone

(707) 638-5809

NPI assigned

Oct 23, 2023

Sex

Male

Sole proprietor

Yes

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

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Specialty

Physician Assistant

Education

Other, 2026

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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

{
    "created_epoch": "1698019200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784073600000",
    "number": "1689446825",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1310 CLUB DR",
            "city": "VALLEJO",
            "state": "CA",
            "postal_code": "945921187",
            "telephone_number": "707-638-5809"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1310 CLUB DR",
            "city": "VALLEJO",
            "state": "CA",
            "postal_code": "945921187",
            "telephone_number": "707-638-5809"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "400 Parnassus Ave Fl 4",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941432202",
            "country_code": "US",
            "telephone_number": "415-343-2421",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHANG",
        "first_name": "SAMUEL",
        "middle_name": "YEJIN",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2023-10-23",
        "last_updated": "2026-07-15",
        "certification_date": "2026-07-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA68670",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jae Ki Chang, PHARM.D.
• Joan CHI-CHI Chang, L.AC.,PH.D.
• Lawrence Chang, DPT
• Rebekah Chang, MD
• Sabrina Chang
• Tiffany Lap Cheng Chang
• Xinyue Chang
• Wendy Chengman Chao
• William Chao, D.M.D.
• Marla Charbonneau

• Physician Assistant in Vallejo, CA
• Providers in Vallejo, CA by specialty
• Physician Assistant in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 15, 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.