Dr. Hiep Nguyen, MD
- Medicare services, 2019
- 157
- Part D claims, 2022
- 79
- Hospital affiliations
- 1
- Industry payments
- $658
- State license
- 1
- Practice address
- 5555 West Las Positas Boulevard, Pleasanton, CA 94588
- Practice phone
- Call (925) 847-3000
- 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. Hiep Nguyen is an internist in Pleasanton, California
Dr. Nguyen practices at Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University.
Dr. Nguyen's NPI, 1184716151, was assigned on September 28, 2006. Dr. Nguyen graduated from Ho Chi Minh City Medicine and Pharmacy University in 1974. Dr. Nguyen holds California license A52455.
- NPI
- 1184716151NPI Registry (opens in a new tab)
- NPI enumeration date
- September 28, 2006
- NPI status
- Active
- Practice phone
- (925) 847-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Hiep Nguyen practices at Stanford Health Care Tri-Valley in Pleasanton, California
Dr. Nguyen's primary practice is Stanford Health Care Tri-Valley, at 5555 West Las Positas Boulevard, Pleasanton, CA 94588 in Alameda County. The practice phone is (925) 847-3000.
- Stanford Health Care Tri-Valley5555 West Las Positas Boulevard, Pleasanton, CA 94588 · Alameda CountyPhone(925) 847-3000
Source: Dmand AI Affiliation Data
Dr. Hiep Nguyen is affiliated with 1 site of care
Dr. Nguyen's primary practice is Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Hiep Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Health Care Tri-Valley | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hiep 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 licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
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. Hiep Nguyen billed Medicare for 157 services in 2019
CMS data shows 157 Medicare services from Dr. Nguyen across 3 procedure codes in 2019. Medicare paid $14,426 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nguyen's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 2782019: 15744%
Dr. Nguyen compared with the California median for internists, 2019
- Dr. Nguyen
- California median
- Medicare services
- 157vs 36157% below
- Part D claims
- 79vs 42181% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Nguyen's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hiep Nguyen's patients have a median age of 81
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 81, with 17% 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 81
Patient panel by sex, all payers
- Women17%
- Men83%
Source: Dmand AI Patient Panel Data
Dr. Hiep Nguyen wrote 79 Medicare Part D claims in 2022
In 2022, Dr. Nguyen wrote 79 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $712 in total drug cost. In 2021, CMS named 481 claims across 20 drugs.
Dr. Nguyen's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 4812022: 7984%
Drugs named by CMS: 5 in 2022, 20 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Hiep Nguyen received $658 in industry payments from 2018 to 2023
CMS Open Payments shows 8 general payments to Dr. Nguyen from 6 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $243.
General payments to Dr. Nguyen by program year, 2018 to 2023
Companies that paid Dr. Nguyen the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hiep Nguyen graduated from Ho Chi Minh City Medicine and Pharmacy University
Dr. Nguyen graduated from Ho Chi Minh City Medicine and Pharmacy University in 1974.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Hiep 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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Hiep 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. Hiep Nguyen's NPI number?
Dr. Hiep Nguyen's NPI number is 1184716151. It was assigned on September 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Hiep Nguyen?
Dr. Hiep Nguyen is an internist in Pleasanton, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Hiep Nguyen practice?
Dr. Nguyen practices at 5555 West Las Positas Boulevard, Pleasanton, CA 94588. Dr. Nguyen's primary practice is Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University.
What is Dr. Hiep Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (925) 847-3000.
What is Dr. Hiep Nguyen's medical license number?
Dr. Nguyen holds California license A52455.
Which hospitals is Dr. Hiep Nguyen affiliated with?
Dr. Nguyen practices at Stanford Health Care Tri-Valley in Pleasanton, California.
Does Dr. Hiep Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 157 services in 2019.
What services does Dr. Hiep Nguyen bill to Medicare?
In 2019, Dr. Nguyen's most billed Medicare services were nursing facility care (99310), nursing facility care (99309) and nursing facility care (99306).
Where did Dr. Hiep Nguyen go to medical school?
Dr. Nguyen graduated from Ho Chi Minh City Medicine and Pharmacy University in 1974.
What drugs does Dr. Hiep Nguyen prescribe most?
In 2022 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Allopurinol, Losartan Potassium and Amlodipine Besylate.
Has Dr. Hiep Nguyen received payments from drug or device companies?
CMS Open Payments shows $658 in general payments to Dr. Nguyen from 6 companies from 2018 to 2023. The largest total came from Gilead Sciences, Inc.
How long has Dr. Hiep Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1974, 52 years ago.
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