Naili Alexander Chen, D.O., MPH, MASC

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

20A7408 Issued in CA

Practice address

44439 17TH St W
Lancaster, CA 93534-2831

Phone

(661) 729-8655

NPI assigned

Nov 8, 2005

Last updated

May 20, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 7

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Osteopathy

State licenses

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

{
    "created_epoch": "1131408000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779235200000",
    "number": "1649251661",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "44439 17TH ST W",
            "city": "LANCASTER",
            "state": "CA",
            "postal_code": "935342831",
            "telephone_number": "661-729-8655"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "44439 17TH ST W",
            "city": "LANCASTER",
            "state": "CA",
            "postal_code": "935342831",
            "telephone_number": "661-729-8655"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3551 Roger Brooke Dr",
            "address_purpose": "LOCATION",
            "city": "Fort Sam Houston",
            "state": "TX",
            "postal_code": "782344504",
            "country_code": "US",
            "telephone_number": "210-539-9582",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1100 Wilford Hall Loop Bldg 4554",
            "address_purpose": "LOCATION",
            "city": "Jbsa Lackland",
            "state": "TX",
            "postal_code": "782365638",
            "country_code": "US",
            "telephone_number": "210-539-9582",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHEN",
        "first_name": "NAILI",
        "middle_name": "ALEXANDER",
        "name_prefix": "Dr.",
        "credential": "D.O., MPH, MASC",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-11-08",
        "last_updated": "2026-05-20",
        "certification_date": "2026-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207PE0004X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Emergency Medical Services",
            "state": "CA",
            "license": "20A7408",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "OS-009459-L",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "20A7408",
            "primary": true
        },
        {
            "code": "2083A0100X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Aerospace Medicine",
            "state": "CA",
            "license": "20A7408",
            "primary": false
        },
        {
            "code": "2083P0500X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Preventive Medicine/Occupational Environmental Medicine",
            "state": "CA",
            "license": "20A7408",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "PA",
            "license": "OS-009459L",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CA",
            "license": "20A7048",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS OF CALIFORNIA",
            "identifier": "20A7408",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Milton Cheek IV, SUDRC#16932
• Sophia Chellappa
• Tiffany T Chen Romero, OD
• Kristi L. Chen, CPNP
• Miaoyun Chen, LCSW
• Ponnamma Medappa Chenanda, M.D.
• Kristine Chermakyan, APCC
• Man-Ching L Cheung, LCSW
• Mary Lou Chheng, PHARMD
• Kwang Hyun CHI, D.D.S.

• Internal Medicine Physician in Lancaster, CA
• Providers in Lancaster, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 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.