Catherine Nguyen, MD
Family Medicine Physician · Costa Mesa, CA
Catherine Nguyen, MD is a family medicine physician with a practice address in Costa Mesa, California, and NPI 1730569005, issued on Jun 2, 2015. Check the license (California A144732, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Nguyen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A144732 CA
Self-reported in NPPES; status is on the state search - Practice location
- 722 Baker St, Costa Mesa, CA 92626
- Phone
- (714) 557-6300
- Enumerated
- Jun 2, 2015
- Record last updated
- Dec 13, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (714) 966-9567
- Medicare enrollment
- Enrolled (PECOS I20190501002569); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 722 Baker St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Chun, MDFamily Medicine Physician1932199213
- Loi Doan, DOFamily Medicine Physician1316523178
- Rachit Doshi, M.D.Family Medicine Physician1548555394
- Ashkan Farhadi, M.D.Gastroenterology Physician1760423123
- Joseph Horejsi, MDFamily Medicine Physician1295726347
- Ena Kariya, MDFamily Medicine Physician1588655658
Verify Catherine Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A144732Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average family medicine physician in 2024
563 Medicare Part D claims for 70 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Atorvastatin Calcium46 claims
- Levothyroxine Sodium43 claims
- Gabapentin31 claims
- Lisinopril29 claims
- Rosuvastatin Calcium27 claims
- Metformin Hcl24 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.
Bills Medicare through one group practice
- Memorialcare Medical FoundationCosta Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Nguyen among 17,133 family medicine physician records in California
Catherine Nguyen, MD 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 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2015 · median 2005 among the 10,652 with a school on file
- Record last updated2018 · 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 Catherine Nguyen, MD's NPI number?
Catherine Nguyen, MD's National Provider Identifier (NPI) is 1730569005, issued on Jun 2, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Nguyen, MD located?
The NPPES record lists a practice address at 722 Baker St, Costa Mesa, CA, 92626. Phone: (714) 557-6300. Providers update this record themselves, so call before visiting.
How can I verify Catherine Nguyen, MD's license?
NPPES lists California license number A144732, 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 Catherine Nguyen, MD prescribe under Medicare Part D?
In 2024, Catherine Nguyen, MD had 563 Medicare Part D claims for 70 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.