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Dr. Duke H. Nguyen, MD
NPI1679557797PAC ID2567453541
- Medicare services, 2024
- 542
- Medicare patients, 2024
- 222
- Part D claims, 2024
- 555
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 18111 Brookhurst St, Fountain Valley, CA 92708
- Practice phone
- Call (714) 378-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
MemorialCare Orange Coast Medical Center
Fountain Valley, California
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. Duke H. Nguyen is a gastroenterologist in Fountain Valley, California
Dr. Nguyen practices at MemorialCare Orange Coast Medical Center in Fountain Valley, California.
Dr. Nguyen's NPI, 1679557797, was assigned on December 1, 2005. Dr. Nguyen graduated from St. George's Hospital Medical School in 1996. Dr. Nguyen holds California license A72508.
NPI and contact details
- NPI
- 1679557797NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567453541
- NPI enumeration date
- December 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 378-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Duke H. Nguyen practices at MemorialCare Orange Coast Medical Center in Fountain Valley, California
Dr. Nguyen's primary practice is MemorialCare Orange Coast Medical Center, at 18111 Brookhurst St, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 378-7000.
- MemorialCare Orange Coast Medical Center18111 Brookhurst St, Fountain Valley, CA 92708 · Orange CountyPhone(714) 378-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Duke H. Nguyen is affiliated with 4 sites of care and 2 medical groups
Dr. Nguyen's primary practice is MemorialCare Orange Coast Medical Center in Fountain Valley, California. Dr. Nguyen is also affiliated with Orange Coast Medical Center. The medical group on file is Orange County Digestive Care. Dmand AI also links Dr. Nguyen to 2 more group practices and clinics and 1 medical group, each named with a free account.
MemorialCare Orange Coast Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Duke H. Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MemorialCare Orange Coast Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Duke H. Nguyen is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Nguyen is board certified in gastroenterology by the National Board of Physicians and Surgeons. Dmand AI has Dr. Nguyen's licenses on file in 2 states: California and Oregon.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
- Oregon license
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, chronic indigestion, cirrhosis of the liver, colonoscopy, fatty liver, gastrointestinal bleeding and hemorrhoids among the conditions Dr. Nguyen treats.
Gastroenterologists near Dr. Nguyen
Counts of gastroenterologists 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. Duke H. Nguyen billed Medicare for 542 services in 2024
CMS data shows 542 Medicare services from Dr. Nguyen across 8 procedure codes in 2024, for 222 Medicare patients. Medicare paid $58,401 for them.
Medicare services, 2024542
Medicare patients222
Paid by Medicare$58,401
Procedure codes8
Dr. Nguyen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3992024: 35910%
- Surgery
- 2023: 1762024: 1834%
Where Dr. Nguyen's Medicare services took place, 2024
- In an office34463%
- In a facility19837%
Dr. Nguyen compared with the California median for gastroenterologists, 2024
- Dr. Nguyen
- California median
- Medicare services
- 542vs 5868% below
- Medicare patients
- 222vs 30226% below
- Part D claims
- 470vs 38024% above
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Nguyen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Nguyen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Duke H. Nguyen treated 222 Medicare patients in 2024, average age 73
CMS counts 222 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 125 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 66% are also on Medicaid. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 59, with 55% women.
Medicare patients, 2024222
Average age73
Average risk score1.44
Also on Medicaid66%
Dr. Nguyen's Medicare patients by age, 2024
Dr. Nguyen's Medicare patients by sex, 2024
- Women12255%
- Men10045%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Diabetes41%
- Chronic kidney disease27%
- Ischemic heart disease27%
- Osteoporosis23%
- Anxiety20%
Share of Medicare patients with each condition. A patient can have several.
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 59
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Duke H. Nguyen wrote 555 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 555 Medicare Part D claims for 281 patients. 83% of them were for generic drugs. CMS names the drug for 470 of them, across 13 drugs with 11 or more claims each, at $90,609 in total drug cost. In 2023, CMS named 621 claims across 17 drugs.
Part D claims, 2024555
Drugs named by CMS13
Total drug cost$90,609
Part D patients281
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic459 claims83%
- Brand-name and other96 claims17%
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
- Antibiotics3%15 of 555 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: 6212024: 47024%
Drugs named by CMS: 13 in 2024, 17 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. Duke H. Nguyen ranks in the 92nd percentile for colonoscopy 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 177 procedures of colonoscopy by Dr. Nguyen, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Nguyen ranks in Medicare procedure volume
- Colonoscopy
- 92nd percentile177 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 76th percentile96 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. Duke H. Nguyen has 1 publication on record
Dmand AI links 1 paper to Dr. Nguyen. Dr. Nguyen's most frequent co-authors are Douglas Graham Adler, MD and Emily K. Robinson, MD.
Papers1
Dr. Nguyen's most frequent co-authors
Recent publications by Dr. Nguyen
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 gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Duke H. Nguyen received $169,725 in industry payments from 2016 to 2025
CMS Open Payments shows 209 general payments to Dr. Nguyen from 12 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 80% of the total. Gilead Sciences, Inc. paid the most, $152,606.
General payments to Dr. Nguyen by program year, 2016 to 2025
General payments to Dr. Nguyen by kind, 2016 to 2025
$169.7Kin total
- Speaker and faculty fees$135,32080%
- Consulting fees$18,53011%
- Travel and lodging$8,2065%
- Food and beverage$7,5984%
- Gifts$720%
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. Duke H. Nguyen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Nguyen, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Nguyen
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Duke H. Nguyen graduated from St. George's Hospital Medical School
Dr. Nguyen graduated from St. George's Hospital Medical School in 1996.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Duke H. Nguyen accepts plans from 9 insurance carriers
Dr. Nguyen is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- +1 more carriersWith a free account
Plan types Dr. Nguyen accepts, by number of carriers
- Medicare9
- PPO7
- HMO4
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Duke H. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Duke H. 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. Duke H. Nguyen's NPI number?
Dr. Duke H. Nguyen's NPI number is 1679557797. It was assigned on December 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Duke H. Nguyen?
Dr. Duke H. Nguyen is a gastroenterologist in Fountain Valley, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Duke H. Nguyen practice?
Dr. Nguyen practices at 18111 Brookhurst St, Fountain Valley, CA 92708. Dr. Nguyen's primary practice is MemorialCare Orange Coast Medical Center in Fountain Valley, California. Dmand AI also links Dr. Nguyen to 2 group practices and clinics and 1 medical group.
What is Dr. Duke H. Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (714) 378-7000.
What is Dr. Duke H. Nguyen's medical license number?
Dr. Nguyen holds California license A72508, one of the licenses on file in 2 states.
Which states has Dr. Duke H. Nguyen been licensed in?
Dmand AI has state licenses on file for Dr. Nguyen in California (2000 to 2026) and Oregon (since 2004).
Which hospitals is Dr. Duke H. Nguyen affiliated with?
Dr. Nguyen is affiliated with Orange Coast Medical Center.
What medical group is Dr. Duke H. Nguyen part of?
Dr. Nguyen is linked to Orange County Digestive Care. Dmand AI links Dr. Nguyen to 1 more medical group.
Does Dr. Duke H. Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 542 services in 2024, and Dr. Nguyen accepts Medicare assignment.
Does Dr. Duke H. Nguyen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nguyen as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Duke H. Nguyen see?
CMS counts 222 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 73.
Is Dr. Duke H. Nguyen board certified?
Yes. Dr. Nguyen is board certified in gastroenterology by the National Board of Physicians and Surgeons.
What services does Dr. Duke H. Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. Duke H. Nguyen go to medical school?
Dr. Nguyen graduated from St. George's Hospital Medical School in 1996.
What drugs does Dr. Duke H. Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Omeprazole, Famotidine and Gavilyte-G.
Has Dr. Duke H. Nguyen received payments from drug or device companies?
CMS Open Payments shows $169,725 in general payments to Dr. Nguyen from 12 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Duke H. Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1996, 30 years ago.
Does Dr. Duke H. Nguyen do research?
Dmand AI links 1 publication to Dr. Nguyen.
Who does Dr. Duke H. Nguyen publish with?
Dr. Nguyen's most frequent co-authors are Douglas Graham Adler, MD (1 shared paper) and Emily K. Robinson, MD (1 shared paper).
What insurance does Dr. Duke H. Nguyen accept?
Dr. Nguyen is in network with 9 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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