Thuytrang Diep Nguyen, M.D.
Internal Medicine Physician · San Juan Capistrano, CA
Thuytrang Diep Nguyen, M.D. is an internal medicine physician with a practice address in San Juan Capistrano, California, and NPI 1861537656, issued on Feb 20, 2007. Check the license (California A61868, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thuytrang Diep Nguyen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A61868 CA
Self-reported in NPPES; status is on the state search - Practice location
- 30300 Camino Capistrano, San Juan Capistrano, CA 92675
- Phone
- (949) 240-2030
- Enumerated
- Feb 20, 2007
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (949) 240-5869
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 30300 Camino Capistrano
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Heather AndriniPhysician Assistant1477361277
- Velva Berger, N.P., CNP-PCNurse Practitioner1891830998
- Ishani Dhillon, DDSGeneral Practice Dentistry1073044376
- Tessa Durbano, LCSWClinical Social Worker1578940722
- Summer Felcyn-Ghenco, WHNP-BCWomen's Health Nurse Practitioner1932823101
- Sierra Gage, RN, CPNP-PCPediatric Nurse Practitioner1356223853
Verify Thuytrang Diep Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average internal medicine physician in 2024
791 Medicare Part D claims for 107 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Amlodipine Besylate66 claims
- Atorvastatin Calcium58 claims
- Lisinopril47 claims
- Losartan Potassium38 claims
- Metformin Hcl35 claims
- Omeprazole26 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.
Thuytrang Diep Nguyen among 17,696 internal medicine physician records in California
Thuytrang Diep Nguyen, M.D. 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. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 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).
10 internal medicine physician records list a practice address in San Juan Capistrano
They are 10 of the 676 NPPES records with a practice address in San Juan Capistrano, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Juan Capistrano → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Patricia Ahearn, M.D.San Juan Capistrano, CA 926751982655304
- Bishen Bedi, MDSan Juan Capistrano, CA 926751538690284
- Gracia Covarrubias, MDSan Juan Capistrano, CA 926751730119751
- Yu-Hua Fang, M.D.San Juan Capistrano, CA 926751881647642
- Catherine McMillanSan Juan Capistrano, CA 926751114580222
- Deepa Oza, FNP-CSan Juan Capistrano, CA 926751336679323
- Audrey Rocco-Welch, MDSan Juan Capistrano, CA 926751770616716
- Jesus Valadez, MDSan Juan Capistrano, CA 926751144221839
Common questions
What is Thuytrang Diep Nguyen, M.D.'s NPI number?
Thuytrang Diep Nguyen, M.D.'s National Provider Identifier (NPI) is 1861537656, issued on Feb 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Thuytrang Diep Nguyen, M.D. located?
The NPPES record lists a practice address at 30300 Camino Capistrano, San Juan Capistrano, CA, 92675. Phone: (949) 240-2030. Providers update this record themselves, so call before visiting.
How can I verify Thuytrang Diep Nguyen, M.D.'s license?
NPPES lists California license number A61868, 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 Thuytrang Diep Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Thuytrang Diep Nguyen, M.D. had 791 Medicare Part D claims for 107 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.