Tiffany Thuong Nguyen, M.D.
Internal Medicine Physician · Garden Grove, CA
Tiffany Thuong Nguyen, M.D. is an internal medicine physician with a practice address in Garden Grove, California, and NPI 1770840530, issued on Apr 18, 2012. Check the license (California A128638, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tiffany Thuong Nguyen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A128638 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12100 Euclid St, Garden Grove, CA 92840
- Phone
- (888) 988-2800
- Enumerated
- Apr 18, 2012
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20151016000422); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 12100 Euclid St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maydole Aldalur, NURSE PRACTITIONERPediatric Nurse Practitioner1811317001
- Christine AtallaPharmacist1154860070
- Yvonne Bach, M.D.Pediatrics Physician1396967337
- Ashley Brown, M.D.Dermatology Physician1245591783
- Tuan Cao, PHARM.DPharmacist1679011571
- Jennifer Chan, D.O.Family Medicine Physician1821433830
Verify Tiffany Thuong Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128638Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,295 Medicare Part D claims for 269 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 13 claims were for opioids.
Most prescribed
- Atorvastatin Calcium176 claims
- Amlodipine Besylate131 claims
- Losartan Potassium100 claims
- Levothyroxine Sodium98 claims
- Metformin Hcl81 claims
- Simvastatin77 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
- Southern California Permanente Medical GroupGarden Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tiffany Thuong Nguyen among 17,696 internal medicine physician records in California
Tiffany Thuong 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 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- 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).
39 internal medicine physician records list a practice address in Garden Grove
They are 39 of the 4,572 NPPES records with a practice address in Garden Grove, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Garden Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Negin Behazin, MDGarden Grove, CA 928401497076301
- Bryan Choi, MDGarden Grove, CA 928401255525499
- Danh Dan, M.D.Garden Grove, CA 928401790917631
- Edward Ko, M.D.Garden Grove, CA 928401396911798
- Adriana Longo, M.D.Garden Grove, CA 928401124004999
- Benjamin Navarro, M.D.Garden Grove, CA 928401033208608
- Tan Nguyen, M.D.Garden Grove, CA 928401609839299
- Tam Nguyen, M.D.Garden Grove, CA 928401720153182
Common questions
What is Tiffany Thuong Nguyen, M.D.'s NPI number?
Tiffany Thuong Nguyen, M.D.'s National Provider Identifier (NPI) is 1770840530, issued on Apr 18, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Tiffany Thuong Nguyen, M.D. located?
The NPPES record lists a practice address at 12100 Euclid St, Garden Grove, CA, 92840. Phone: (888) 988-2800. Providers update this record themselves, so call before visiting.
How can I verify Tiffany Thuong Nguyen, M.D.'s license?
NPPES lists California license number A128638, 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 Tiffany Thuong Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Tiffany Thuong Nguyen, M.D. had 2,295 Medicare Part D claims for 269 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.