Dr. Than Nguyen, DO
- Part D claims, 2024
- 982
- Publications
- 2
- Hospital affiliations
- 4
- Industry payments
- $4,721
- Medical groups
- 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. Than 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, 1316207236, was assigned on May 24, 2012. Dr. Nguyen graduated from LECOM at Seton Hill - Greensburg in 2012. Dr. Nguyen holds Michigan license L2226995.
- NPI
- 1316207236NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698068583
- NPI enumeration date
- May 24, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 624-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Than 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. Than Nguyen is affiliated with 7 sites of care and 2 medical groups
Dr. Nguyen's primary practice is Vacaville Medical Center in Vacaville, California, part of Kaiser Permanente. Dr. Nguyen is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Nguyen to 2 more hospitals, 2 group practices and clinics, 1 clinical lab and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Than Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 7 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 |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Than 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 internal medicine by the American Board of Internal Medicine. Dr. Nguyen is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Clinical focus
Dmand AI lists fatty liver among the conditions Dr. Nguyen treats.
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. Than Nguyen's patients have a median age of 53
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 53, with 53% 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 53
Patient panel by sex, all payers
- Women53%
- Men42%
Source: Dmand AI Patient Panel Data
Dr. Than Nguyen wrote 982 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 982 Medicare Part D claims for 527 patients. 95% of them were for generic drugs. CMS names the drug for 853 of them, across 15 drugs with 11 or more claims each, at $37,287 in total drug cost. In 2023, CMS named 603 claims across 12 drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic933 claims95%
- Brand-name49 claims5%
Dr. Nguyen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Nguyen's Part D claims, 2024
- Antibiotics2%16 of 982 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6032024: 85341%
Drugs named by CMS: 15 in 2024, 12 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Than Nguyen ranks in the 72nd percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nguyen as offering telehealth. CMS counts 79 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Nguyen, more than 72% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Nguyen ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 72nd percentile79 procedures
- Colonoscopy
- 63rd percentile49 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Than Nguyen has 2 publications on record
Dmand AI links 2 papers to Dr. Nguyen in 2020. Dr. Nguyen's most frequent co-authors are William J. Bommer, MD, Milind R. Dhond, MD and Naresh T. Gunaratnam, MD.
Dr. Nguyen's most frequent co-authors
- William J. Bommer, MD1 shared paper
- Milind R. Dhond, MD1 shared paper
- Naresh T. Gunaratnam, MD1 shared paper
Recent publications by Dr. Nguyen
Am J Geriatr Cardiol
See who Dr. Nguyen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nguyen works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Than Nguyen received $4,721 in industry payments from 2016 to 2025
CMS Open Payments shows 135 general payments to Dr. Nguyen from 21 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 73% of the total. Olympus Corporation of the Americas paid the most, $944.
General payments to Dr. Nguyen by program year, 2016 to 2025
General payments to Dr. Nguyen by kind, 2016 to 2025
- Food and beverage$3,44673%
- Travel and lodging$1,08623%
- Education$1894%
Companies that paid Dr. Nguyen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Than Nguyen graduated from LECOM at Seton Hill - Greensburg
Dr. Nguyen graduated from LECOM at Seton Hill - Greensburg in 2012.
- Medical school
- Board certified in internal medicine
- Board certified in gastroenterology
- Board certified in internal medicine
- Board certified in 2018 - 2026
- Board certified in 2017 - 2017
- Board certified in 2012 - 2018
Source: Dmand AI Professional Profile Data
Dr. Than Nguyen accepts plans from 2 insurance carriers
Dr. Nguyen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Nguyen accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Than 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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Than 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. Than Nguyen's NPI number?
Dr. Than Nguyen's NPI number is 1316207236. It was assigned on May 24, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Than Nguyen?
Dr. Than Nguyen is an internist in Vacaville, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Than 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 2 hospitals, 2 group practices and clinics, 1 clinical lab and 1 medical group.
What is Dr. Than Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (707) 624-4000.
What is Dr. Than Nguyen's medical license number?
Dr. Nguyen holds Michigan license L2226995.
Which hospitals is Dr. Than Nguyen affiliated with?
Dr. Nguyen practices at Vacaville Medical Center in Vacaville, California. Dr. Nguyen is also affiliated with Alta Bates Summit Medical Center | Alta Bates Campus. Dmand AI links Dr. Nguyen to 2 more hospitals.
What medical group is Dr. Than Nguyen part of?
Dr. Nguyen is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Nguyen to 1 more medical group.
Does Dr. Than Nguyen accept Medicare?
Yes. CMS lists Dr. Nguyen as accepting Medicare assignment.
Does Dr. Than Nguyen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nguyen as offering telehealth services.
Is Dr. Than Nguyen board certified?
Yes. Dr. Nguyen is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
Where did Dr. Than Nguyen go to medical school?
Dr. Nguyen graduated from LECOM at Seton Hill - Greensburg in 2012.
What drugs does Dr. Than Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Gavilyte-C, Pantoprazole Sodium and Omeprazole.
Has Dr. Than Nguyen received payments from drug or device companies?
CMS Open Payments shows $4,721 in general payments to Dr. Nguyen from 21 companies from 2016 to 2025. The largest total came from Olympus Corporation of the Americas.
How long has Dr. Than Nguyen been practicing?
Dr. Nguyen graduated from medical school in 2012, 14 years ago.
Does Dr. Than Nguyen do research?
Dmand AI links 2 publications to Dr. Nguyen.
Who does Dr. Than Nguyen publish with?
Dr. Nguyen's most frequent co-authors are William J. Bommer, MD (1 shared paper), Milind R. Dhond, MD (1 shared paper) and Naresh T. Gunaratnam, MD (1 shared paper).
What insurance does Dr. Than Nguyen accept?
Dr. Nguyen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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