Dr. Tan The Nguyen, MD
- Medicare services, 2023
- 128
- Part D claims, 2024
- 2,465
- Industry payments
- $331
- Affiliated sites
- 8
- Medical groups
- 4
- Practice address
- 12882 Shackelford Lane, Garden Grove, CA 92841
- Practice phone
- Call (714) 638-9470
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Garden Grove Post Acute
Skilled Nursing Facility · Garden Grove, 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. Tan The Nguyen is an internist in Garden Grove, California
Dr. Nguyen practices at Garden Grove Post Acute in Garden Grove, California.
Dr. Nguyen's NPI, 1609839299, was assigned on April 6, 2006. Dr. Nguyen holds California license G67119.
- NPI
- 1609839299NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810995362
- NPI enumeration date
- April 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 638-9470
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tan The Nguyen practices at Garden Grove Post Acute in Garden Grove, California
Dr. Nguyen's primary practice is Garden Grove Post Acute, at 12882 Shackelford Lane, Garden Grove, CA 92841 in Orange County. The practice phone is (714) 638-9470.
- Garden Grove Post Acute12882 Shackelford Lane, Garden Grove, CA 92841 · Orange CountyPhone(714) 638-9470
Source: Dmand AI Affiliation Data
Dr. Tan The Nguyen is affiliated with 8 sites of care and 4 medical groups
Dr. Nguyen's primary practice is Garden Grove Post Acute in Garden Grove, California. The medical group on file is 360 Healthcare. Dmand AI also links Dr. Nguyen to 3 more home health agencies, 3 medical groups, 2 group practices and clinics, 1 hospice and 1 senior living community, 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. Tan The Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Garden Grove Post Acute | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tan The 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. Tan The Nguyen billed Medicare for 128 services in 2023
CMS data shows 128 Medicare services from Dr. Nguyen across 2 procedure codes in 2023. Medicare paid $5,541 for them. Every service was in an office.
Dr. Nguyen's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 3592023: 12864%
Dr. Nguyen compared with the California median for internists, 2023
- Dr. Nguyen
- California median
- Medicare services
- 128vs 36165% below
- Part D claims
- 1,833vs 4214.4 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Nguyen's most billed Medicare procedure codes, 2023
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. Tan The Nguyen's patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 74, with 52% 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 74
Patient panel by sex, all payers
- Women52%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Tan The Nguyen wrote 2,465 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 2,465 Medicare Part D claims for 192 patients. 84% of them were for generic drugs. CMS names the drug for 1,833 of them, across 63 drugs with 11 or more claims each, at $134,540 in total drug cost. In 2023, CMS named 2,635 claims across 81 drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic2,065 claims84%
- Brand-name370 claims15%
- Other30 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
- Opioids1%26 of 2,465 claims
- Antibiotics3%65 of 2,465 claims
- Antipsychotics, patients 65 and over1%33 of 2,465 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: 2,6352024: 1,83330%
Drugs named by CMS: 63 in 2024, 81 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. Tan The 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. Tan The Nguyen received $331 in industry payments from 2016 to 2024
CMS Open Payments shows 8 general payments to Dr. Nguyen from 6 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $236.
General payments to Dr. Nguyen by program year, 2016 to 2024
Companies that paid Dr. Nguyen the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Tan The 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)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) |
| 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. Tan The 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. Tan The Nguyen's NPI number?
Dr. Tan The Nguyen's NPI number is 1609839299. It was assigned on April 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Tan The Nguyen?
Dr. Tan The Nguyen is an internist in Garden Grove, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Tan The Nguyen practice?
Dr. Nguyen practices at 12882 Shackelford Lane, Garden Grove, CA 92841. Dr. Nguyen's primary practice is Garden Grove Post Acute in Garden Grove, California. Dmand AI also links Dr. Nguyen to 3 home health agencies, 3 medical groups, 2 group practices and clinics, 1 hospice and 1 senior living community.
What is Dr. Tan The Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (714) 638-9470.
What is Dr. Tan The Nguyen's medical license number?
Dr. Nguyen holds California license G67119.
What medical group is Dr. Tan The Nguyen part of?
Dr. Nguyen is linked to 360 Healthcare. Dmand AI links Dr. Nguyen to 3 more medical groups.
Does Dr. Tan The Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 128 services in 2023, and Dr. Nguyen accepts Medicare assignment.
What services does Dr. Tan The Nguyen bill to Medicare?
In 2023, Dr. Nguyen's most billed Medicare services were care management and other visits (99457) and care management and other visits (99454).
What drugs does Dr. Tan The Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Gabapentin.
Has Dr. Tan The Nguyen received payments from drug or device companies?
CMS Open Payments shows $331 in general payments to Dr. Nguyen from 6 companies from 2016 to 2024. The largest total came from Abbott Laboratories.
How long has Dr. Tan The Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1988, 38 years ago.
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