An Thi-Ngoc Nguyen, D.O.
Family Medicine Physician · Costa Mesa, CA
An Thi-Ngoc Nguyen, D.O. is a family medicine physician with a practice address in Costa Mesa, California, and NPI 1669729513, issued on Aug 10, 2012. Check the license (California 20A12373, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- An Thi-Ngoc Nguyen
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A12373 CA
Self-reported in NPPES; status is on the state search - Practice location
- 150 Paularino Ave Ste D182, Costa Mesa, CA 92626
- Phone
- (949) 353-5053
- Enumerated
- Aug 10, 2012
- Record last updated
- Jun 14, 2022
- Fax
- (949) 799-2808
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 150 Paularino Ave Ste D182
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lina HoFamily Nurse Practitioner1538835079
- Madison LucasFamily Nurse Practitioner1023703063
- Uchenna Ohiri, FNP--CFamily Nurse Practitioner1457859738
- Karen Anne ShadrickNurse Practitioner1205322872
- Katherine Yi, FNPFamily Nurse Practitioner1154033371
Verify An Thi-Ngoc Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A12373Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% more Medicare Part D claims than the average family medicine physician in 2024
5,643 Medicare Part D claims for 345 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 120 claims were for opioids.
Most prescribed
- Levothyroxine Sodium283 claims
- Atorvastatin Calcium224 claims
- Trazodone Hcl213 claims
- Quetiapine Fumarate212 claims
- Tamsulosin Hcl158 claims
- Furosemide134 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
An Thi-Ngoc Nguyen among 17,133 family medicine physician records in California
An Thi-Ngoc Nguyen, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 66% of them.
- NPI issued2012 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 family medicine physician records list a practice address in Costa Mesa
They are 56 of the 4,286 NPPES records with a practice address in Costa Mesa, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Costa Mesa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ronald Bangsil, MDCosta Mesa, CA 926261043261654
- David Chun, MDCosta Mesa, CA 926261932199213
- James Ferguson, DOCosta Mesa, CA 926261689625212
- Sienna Go, M.D.Costa Mesa, CA 926261295759298
- Guy Gottschalk, M.D.Costa Mesa, CA 926261235228750
- Joseph Horejsi, MDCosta Mesa, CA 926261295726347
- Michael Kao, M.D.Costa Mesa, CA 926261316953805
- Ena Kariya, MDCosta Mesa, CA 926261588655658
Common questions
What is An Thi-Ngoc Nguyen, D.O.'s NPI number?
An Thi-Ngoc Nguyen, D.O.'s National Provider Identifier (NPI) is 1669729513, issued on Aug 10, 2012. An NPI identifies a provider in billing; it is not a license.
Where is An Thi-Ngoc Nguyen, D.O. located?
The NPPES record lists a practice address at 150 Paularino Ave Ste D182, Costa Mesa, CA, 92626. Phone: (949) 353-5053. Providers update this record themselves, so call before visiting.
How can I verify An Thi-Ngoc Nguyen, D.O.'s license?
NPPES lists California license number 20A12373, 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.
How much does An Thi-Ngoc Nguyen, D.O. prescribe under Medicare Part D?
In 2024, An Thi-Ngoc Nguyen, D.O. had 5,643 Medicare Part D claims for 345 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.