Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Johnny Nguyen DO, MD

Individual provider Internal Medicine Physician · NPI 1235371675

Johnny Nguyen DO, MD practises Internal Medicine in Orange, California. Graduated from Eastern Virginia Medical School in 2007, 19 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Washington.

Years since qualifying
19
Trained at
Eastern Virginia Medical School
Licensed in
CA, WA
In the registry since
2009
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1100 W Stewart Dr
Orange, CA 92868-3849
Phone: (714) 771-8000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 5633 N Lidgerwood St, Spokane, WA 99208-1224 — (509) 868-0876

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A107046 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD60335318 (WA)
Pediatrics Physician Taxonomy 208000000X · Licence MD60335318 (WA)
Hospitalist Physician Taxonomy 208M00000X · Licence MD60335318 (WA)

Record details

NPI number1235371675
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 31, 2009
Last updated in NPPESOctober 21, 2021
Certification dateOctober 21, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolEASTERN VIRGINIA MEDICAL SCHOOL
Graduated 2007 (19 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients227
Services billed 608 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $88 3 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Providence St. Joseph Hospital Hospital · Orange, CA

Colleagues at Providence Medical Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1465 clinicians in the practice; 12 are shown here.

Other providers in Orange