Dr. Thai Dinh Nguyen, MD
- Medicare services, 2024
- 2,970
- Medicare patients, 2024
- 343
- Part D claims, 2024
- 10,473
- Hospital affiliations
- 1
- Industry payments
- $14,606
- Practice address
- 15576 Brookhurst St, Westminster, CA 92683
- Practice phone
- Call (714) 775-8090
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Theresa Thanh Ngoc Nguyen, MD, Inc.
Westminster, 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. Thai Dinh Nguyen is an internist in Westminster, California
Dr. Nguyen practices at Theresa Thanh Ngoc Nguyen, MD, Inc. in Westminster, California.
Dr. Nguyen's NPI, 1467547042, was assigned on October 3, 2006. Dr. Nguyen graduated from University of Iowa, RJ & L Carver College of Medicine in 2003. Dr. Nguyen holds California license A91024.
- NPI
- 1467547042NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254435811
- NPI enumeration date
- October 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 775-8090
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thai Dinh Nguyen practices at Theresa Thanh Ngoc Nguyen, MD, Inc. in Westminster, California
Dr. Nguyen's primary practice is Theresa Thanh Ngoc Nguyen, MD, Inc., at 15576 Brookhurst St, Westminster, CA 92683 in Orange County. The practice phone is (714) 775-8090.
- Theresa Thanh Ngoc Nguyen, MD, Inc.15576 Brookhurst St, Westminster, CA 92683 · Orange CountyPhone(714) 775-8090
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thai Dinh Nguyen is affiliated with 6 sites of care and 3 medical groups
Dr. Nguyen's primary practice is Theresa Thanh Ngoc Nguyen, MD, Inc. in Westminster, California. Dr. Nguyen is also affiliated with UCI Health - Orange. The medical group on file is Theresa Thanh Ngoc Nguyen, MD, Inc. Dmand AI also links Dr. Nguyen to 2 more group practices and clinics, 2 home health agencies and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thai Dinh Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Theresa Thanh Ngoc Nguyen, MD, Inc. | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thai Dinh 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. Thai Dinh Nguyen billed Medicare for 2,970 services in 2024
CMS data shows 2,970 Medicare services from Dr. Nguyen across 15 procedure codes in 2024, for 343 Medicare patients. Medicare paid $186,234 for them. Every service was in an office.
Dr. Nguyen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,9062024: 1,8274%
- Surgery
- 2023: 6112024: 6639%
- Other services
- 2023: 3932024: 33714%
- Tests and treatments
- 2023: 1632024: 14312%
Dr. Nguyen compared with the California median for internists, 2024
- Dr. Nguyen
- California median
- Medicare services
- 2,970vs 3618.2 times
- Medicare patients
- 343vs 1512.3 times
- Part D claims
- 9,777vs 42123.2 times
Medians across 15,815 internists 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thai Dinh Nguyen treated 343 Medicare patients in 2024, average age 75
CMS counts 343 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 65 to 74, with 159 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 90% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 63, with 42% women.
Dr. Nguyen's Medicare patients by age, 2024
Dr. Nguyen's Medicare patients by sex, 2024
- Women18755%
- Men15645%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes45%
- Arthritis43%
- Ischemic heart disease24%
- Osteoporosis22%
- Chronic kidney disease18%
- Heart failure18%
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 63
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thai Dinh Nguyen wrote 10,473 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 10,473 Medicare Part D claims for 699 patients. 85% of them were for generic drugs. CMS names the drug for 9,777 of them, across 134 drugs with 11 or more claims each, at $1,226,753 in total drug cost. In 2023, CMS named 8,847 claims across 137 drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic8,865 claims85%
- Brand-name1,451 claims14%
- Other157 claims1%
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
- Opioids0%44 of 10,473 claims
- Antibiotics1%113 of 10,473 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: 8,8472024: 9,77711%
Drugs named by CMS: 134 in 2024, 137 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
How Dr. Thai Dinh 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)
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Dr. Thai Dinh Nguyen received $14,606 in industry payments from 2016 to 2025
CMS Open Payments shows 444 general payments to Dr. Nguyen from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $2,605.
General payments to Dr. Nguyen by program year, 2016 to 2025
General payments to Dr. Nguyen by kind, 2016 to 2025
- Food and beverage$14,554100%
- Education$510%
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. Thai Dinh Nguyen graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. Nguyen graduated from University of Iowa, RJ & L Carver College of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thai Dinh 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 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) |
| 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. Thai Dinh 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. Thai Dinh Nguyen's NPI number?
Dr. Thai Dinh Nguyen's NPI number is 1467547042. It was assigned on October 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thai Dinh Nguyen?
Dr. Thai Dinh Nguyen is an internist in Westminster, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thai Dinh Nguyen practice?
Dr. Nguyen practices at 15576 Brookhurst St, Westminster, CA 92683. Dr. Nguyen's primary practice is Theresa Thanh Ngoc Nguyen, MD, Inc. in Westminster, California. Dmand AI also links Dr. Nguyen to 2 group practices and clinics, 2 home health agencies and 2 medical groups.
What is Dr. Thai Dinh Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (714) 775-8090.
What is Dr. Thai Dinh Nguyen's medical license number?
Dr. Nguyen holds California license A91024.
Which hospitals is Dr. Thai Dinh Nguyen affiliated with?
Dr. Nguyen is affiliated with UCI Health - Orange.
What medical group is Dr. Thai Dinh Nguyen part of?
Dr. Nguyen is linked to Theresa Thanh Ngoc Nguyen, MD, Inc. Dmand AI links Dr. Nguyen to 2 more medical groups.
Does Dr. Thai Dinh Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 2,970 services in 2024, and Dr. Nguyen accepts Medicare assignment.
How many Medicare patients does Dr. Thai Dinh Nguyen see?
CMS counts 343 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 75.
What services does Dr. Thai Dinh Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99213) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Thai Dinh Nguyen go to medical school?
Dr. Nguyen graduated from University of Iowa, RJ & L Carver College of Medicine in 2003.
What drugs does Dr. Thai Dinh Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Thai Dinh Nguyen received payments from drug or device companies?
CMS Open Payments shows $14,606 in general payments to Dr. Nguyen from 42 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Thai Dinh Nguyen been practicing?
Dr. Nguyen graduated from medical school in 2003, 23 years ago.
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