Julie Nguyen, MD
Internal Medicine Physician · Vacaville, CA
Julie Nguyen, MD is an internal medicine physician with a practice address in Vacaville, California, and NPI 1568059822, issued on Dec 21, 2020. Check the license (California 202539, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Julie Nguyen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 202539 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Quality Dr, Vacaville, CA 95688
- Phone
- (707) 815-9049
- Enumerated
- Dec 21, 2020
- Record last updated
- Sep 19, 2025
- Medicare enrollment
- Enrolled (PECOS I20250909001491); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1 Quality Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lamia Alazzawi, PHARM.D.Pharmacist1407380645
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Verify Julie Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 202539Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
231 Medicare Part D claims for 27 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Gabapentin22 claims
- Furosemide18 claims
- Atorvastatin Calcium16 claims
- Spiriva Handihaler16 claims
- Pantoprazole Sodium12 claims
- Ozempic11 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
- Permanente Medical Group IncVacaville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Julie Nguyen among 17,696 internal medicine physician records in California
Julie Nguyen, MD 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2022 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
53 internal medicine physician records list a practice address in Vacaville
They are 53 of the 1,903 NPPES records with a practice address in Vacaville, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Vacaville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kyaw Aung, MDVacaville, CA 956881386722114
- Hon Chan, M.D.Vacaville, CA 956881265529549
- Anne Chen, M.D.Vacaville, CA 956881003852708
- Thomas Fashinell, MDVacaville, CA 956881609926419
- Andleeb Judge, M.D.Vacaville, CA 956881932141124
- Frank Karneges, DOVacaville, CA 956881336220581
- Richard Lasslo, MDVacaville, CA 956881467526780
- James Lee, MDVacaville, CA 956881134279847
Common questions
What is Julie Nguyen, MD's NPI number?
Julie Nguyen, MD's National Provider Identifier (NPI) is 1568059822, issued on Dec 21, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Julie Nguyen, MD located?
The NPPES record lists a practice address at 1 Quality Dr, Vacaville, CA, 95688. Phone: (707) 815-9049. Providers update this record themselves, so call before visiting.
How can I verify Julie Nguyen, MD's license?
NPPES lists California license number 202539, 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 Julie Nguyen, MD prescribe under Medicare Part D?
In 2024, Julie Nguyen, MD had 231 Medicare Part D claims for 27 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.