Dr. John The Phong Nguyen, MD
- Hospital affiliations
- 1
- Industry payments
- $251
- Medical group
- 1
- Insurance carriers
- 1
- State licenses
- 2
- Practice address
- 1 Quality Drive, Vacaville, CA 95688
- Practice phone
- Call (707) 624-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nguyen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John The Phong Nguyen is an internist in Vacaville, California
Dr. Nguyen practices at Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente.
Dr. Nguyen's NPI, 1902868359, was assigned on April 3, 2006. Dr. Nguyen graduated from John A. Burns School of Medicine in 1998. Dr. Nguyen's Texas license number on file is M0511.
- NPI
- 1902868359NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597823500
- NPI enumeration date
- April 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 624-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John The Phong Nguyen practices at Vacaville Medical Center in Vacaville, California
Dr. Nguyen's primary practice is Vacaville Medical Center, at 1 Quality Drive, Vacaville, CA 95688 in Solano County. The practice phone is (707) 624-4000.
- Vacaville Medical Center1 Quality Drive, Vacaville, CA 95688 · Solano CountyPhone(707) 624-4000
Source: Dmand AI Affiliation Data
Dr. John The Phong Nguyen is affiliated with 2 sites of care and 1 medical group
Dr. Nguyen's primary practice is Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Nguyen to 1 more clinical lab, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John The Phong Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vacaville Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John The Phong Nguyen is one of 16,751 internists in California
Internal medicine is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Nguyen is board certified in anesthesiology by the American Board of Anesthesiology. Dmand AI has Dr. Nguyen's licenses on file in 2 states: Texas and California.
Specialties and state licenses
- Internal medicine, TexasPrimary
- California license
Internists near Dr. Nguyen
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John The Phong Nguyen's patients have a median age of 40
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 40, with 61% women.
Dr. Nguyen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women61%
- Men39%
Source: Dmand AI Patient Panel Data
How Dr. John The Phong Nguyen takes part in Medicare
Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Dr. John The Phong Nguyen received $251 in industry payments from 2018 to 2022
CMS Open Payments shows 3 general payments to Dr. Nguyen from 3 drug and device companies from 2018 to 2022. Food and beverage make up the largest share, 62% of the total. IBSA Pharma Inc. paid the most, $125.
General payments to Dr. Nguyen by program year, 2018 to 2022
General payments to Dr. Nguyen by kind, 2018 to 2022
- Food and beverage$15462%
- Education$9738%
Companies that paid Dr. Nguyen the most, 2018 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John The Phong Nguyen graduated from John A. Burns School of Medicine
Dr. Nguyen graduated from John A. Burns School of Medicine in 1998.
- Medical school
- Board certified in anesthesiology
Source: Dmand AI Professional Profile Data
Dr. John The Phong Nguyen accepts plans from 1 insurance carrier
Dr. Nguyen is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Nguyen accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John The Phong Nguyen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John The Phong Nguyen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John The Phong Nguyen's NPI number?
Dr. John The Phong Nguyen's NPI number is 1902868359. It was assigned on April 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John The Phong Nguyen?
Dr. John The Phong Nguyen is an internist in Vacaville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John The Phong Nguyen practice?
Dr. Nguyen practices at 1 Quality Drive, Vacaville, CA 95688. Dr. Nguyen's primary practice is Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente. Dmand AI also links Dr. Nguyen to 1 clinical lab.
What is Dr. John The Phong Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (707) 624-4000.
What is Dr. John The Phong Nguyen's medical license number?
Dr. Nguyen's Texas license number on file is M0511, one of the licenses on file in 2 states.
Which states has Dr. John The Phong Nguyen been licensed in?
Dmand AI has state licenses on file for Dr. Nguyen in Texas (2005 to 2009) and California (2000 to 2026).
Which hospitals is Dr. John The Phong Nguyen affiliated with?
Dr. Nguyen practices at Vacaville Medical Center in Vacaville, California.
What medical group is Dr. John The Phong Nguyen part of?
Dr. Nguyen is linked to The Permanente Medical Group, Inc.
Does Dr. John The Phong Nguyen accept Medicare?
Yes. CMS lists Dr. Nguyen as accepting Medicare assignment.
Is Dr. John The Phong Nguyen board certified?
Yes. Dr. Nguyen is board certified in anesthesiology by the American Board of Anesthesiology.
Show 4 more questionsShow fewer questions
Where did Dr. John The Phong Nguyen go to medical school?
Dr. Nguyen graduated from John A. Burns School of Medicine in 1998.
Has Dr. John The Phong Nguyen received payments from drug or device companies?
CMS Open Payments shows $251 in general payments to Dr. Nguyen from 3 companies from 2018 to 2022. The largest total came from IBSA Pharma Inc.
How long has Dr. John The Phong Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1998, 28 years ago.
What insurance does Dr. John The Phong Nguyen accept?
Dr. Nguyen is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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