Naili Alexander Chen, D.O., MPH, MASC
Internal Medicine Physician · Lancaster, CA
Naili Alexander Chen, D.O., MPH, MASC is an internal medicine physician with a practice address in Lancaster, California, and NPI 1649251661, issued on Nov 8, 2005. Check the license (California 20A7408, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Naili Alexander Chen
- Credential
- D.O., MPH, MASC
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 20A7408 CA
20A7048 CA
OS-009459-L PA
OS-009459L PA
Self-reported in NPPES; status is on the state search - Practice location
- 44439 17TH St W, Lancaster, CA 93534
- Phone
- (661) 729-8655
- Enumerated
- Nov 8, 2005
- Record last updated
- May 20, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 44439 17TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Naili Alexander Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Naili Alexander Chen among 17,696 internal medicine physician records in California
Naili Alexander Chen, D.O., MPH, MASC is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
55 internal medicine physician records list a practice address in Lancaster
They are 55 of the 4,273 NPPES records with a practice address in Lancaster, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Harihar Agarwal, M.D.Lancaster, CA 935341215964150
- Anthony Dulgeroff, M.D.Lancaster, CA 935341720199763
- Antony Fung, MDLancaster, CA 935341477526846
- Miranda Gaw, MDLancaster, CA 935341891705885
- Marvin Ginsburg, M.D.Lancaster, CA 935341508976580
- Shahid Hassan, M.D.Lancaster, CA 935341851401988
- Charles Lim, M.D.Lancaster, CA 935341205947231
- George Mya, M.D.Lancaster, CA 935341790895936
Common questions
What is Naili Alexander Chen, D.O., MPH, MASC's NPI number?
Naili Alexander Chen, D.O., MPH, MASC's National Provider Identifier (NPI) is 1649251661, issued on Nov 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Naili Alexander Chen, D.O., MPH, MASC located?
The NPPES record lists a practice address at 44439 17TH St W, Lancaster, CA, 93534. Phone: (661) 729-8655. Providers update this record themselves, so call before visiting.
How can I verify Naili Alexander Chen, D.O., MPH, MASC's license?
NPPES lists California license number 20A7408, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.