John D. Nguyen, M.D.
Obstetrics & Gynecology Physician · Fallbrook, CA
John D. Nguyen, M.D. is an obstetrics & gynecology physician with a practice address in Fallbrook, California, and NPI 1306078522, issued on Aug 21, 2009. Check the license (California A109246, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John D. Nguyen
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A109246 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1328 S Mission RD, Fallbrook, CA 92028
- Phone
- (760) 451-4752
- Enumerated
- Aug 21, 2009
- Record last updated
- Apr 26, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 1328 S Mission RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Clapp, MDPediatrics Physician1699399337
- Goran Cvijanovic, MDInternal Medicine Physician1427393941
- Ganiat Gbadebo, NPNurse Practitioner1770002990
- Anthony Milliron, MDFamily Medicine Physician1265011084
- Elizabeth Nicolas, DDSDentist1982482089
- Claudine Volkart, RNCommunity Health Registered Nurse1871618124
Verify John D. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109246Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
235 Medicare Part D claims for 28 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium24 claims
- Lisinopril23 claims
- Famotidine13 claims
- Atenolol11 claims
- Clopidogrel11 claims
- Synthroid11 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.
7 obstetrics & gynecology physician records list a practice address in Fallbrook
They are 7 of the 372 NPPES records with a practice address in Fallbrook, and 5,088 obstetrics & gynecology physician records in California.
All 7 in Fallbrook → All 5,088 in California → Every provider in Fallbrook →
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Ahmed Abdelaziz, MDSanta Maria, CA1790039733
- Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
Common questions
What is John D. Nguyen, M.D.'s NPI number?
John D. Nguyen, M.D.'s National Provider Identifier (NPI) is 1306078522, issued on Aug 21, 2009. An NPI identifies a provider in billing; it is not a license.
Where is John D. Nguyen, M.D. located?
The NPPES record lists a practice address at 1328 S Mission RD, Fallbrook, CA, 92028. Phone: (760) 451-4752. Providers update this record themselves, so call before visiting.
How can I verify John D. Nguyen, M.D.'s license?
NPPES lists California license number A109246, 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 John D. Nguyen, M.D. prescribe under Medicare Part D?
In 2024, John D. Nguyen, M.D. had 235 Medicare Part D claims for 28 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.