Tammy Nguyen, OD
- Medicare patients, 2024
- 24
- Part D claims, 2024
- 428
- MIPS score, 2024
- 85
- Industry payments
- $275
- Affiliated sites
- 2
- Practice address
- 50 S San Mateo Dr, San Mateo, CA 94401
- Practice phone
- Call (650) 348-5882
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Plastic Surgery Associates Surgery Center
San Mateo, California
Find Tammy 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.
Tammy Nguyen is an optometrist in San Mateo, California
Tammy Nguyen practices at Plastic Surgery Associates Surgery Center in San Mateo, California.
Tammy Nguyen's NPI, 1396864575, was assigned on March 28, 2007. Tammy Nguyen holds California license OPT 11827 TPA.
- NPI
- 1396864575NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305006180
- NPI enumeration date
- March 28, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 348-5882
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Tammy Nguyen practices at Plastic Surgery Associates Surgery Center in San Mateo, California
Tammy Nguyen's primary practice is Plastic Surgery Associates Surgery Center, at 50 S San Mateo Dr, San Mateo, CA 94401 in San Mateo County. The practice phone is (650) 348-5882.
- Plastic Surgery Associates Surgery Center50 S San Mateo Dr, San Mateo, CA 94401 · San Mateo CountyPhone(650) 348-5882
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Tammy Nguyen is affiliated with 3 sites of care and 2 medical groups
Tammy Nguyen's primary practice is Plastic Surgery Associates Surgery Center in San Mateo, California. Dmand AI also links Tammy Nguyen to 2 group practices and clinics 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 Tammy Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tammy Nguyen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Plastic Surgery Associates Surgery Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Tammy Nguyen is one of 7,206 optometrists in California
Optometrist is Tammy Nguyen's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Tammy Nguyen is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Tammy Nguyen
Counts of optometrists 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
Tammy Nguyen treated 24 Medicare patients in 2024, average age 79
CMS counts 24 Medicare patients who saw Tammy Nguyen in 2024. The largest group is 75 to 84, with 12 patients. 75% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 0.80, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Tammy Nguyen's median patient age at 82, with 53% women.
Tammy Nguyen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Tammy Nguyen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis54%
Share of Medicare patients with each condition. A patient can have several.
Tammy 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 82
Patient panel by sex, all payers
- Women53%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Tammy Nguyen wrote 428 Medicare Part D claims in 2024
In 2024, Tammy Nguyen wrote 428 Medicare Part D claims for 135 patients. 46% of them were for generic drugs.
Tammy Nguyen's Part D claims by kind of drug, 2024
- Generic197 claims46%
- Brand-name231 claims54%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Tammy Nguyen scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Tammy Nguyen for performance year 2024, reported as part of a group. Tammy Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Tammy Nguyen's MIPS scores, performance year 2024
- 85of 100Final score
- 81.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 67of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Tammy Nguyen received $275 in industry payments in 2025
CMS Open Payments shows 12 general payments to Tammy Nguyen from 6 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $77.
Companies that paid Tammy Nguyen the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Tammy 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 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 (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)Clinician Public Reporting: Overall MIPS Performance (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 Tammy 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 Tammy Nguyen's NPI number?
Tammy Nguyen's NPI number is 1396864575. It was assigned on March 28, 2007, and it is active in the NPI Registry.
What does Tammy Nguyen specialize in?
Tammy Nguyen is an optometrist in San Mateo, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Tammy Nguyen practice?
Tammy Nguyen practices at 50 S San Mateo Dr, San Mateo, CA 94401. Tammy Nguyen's primary practice is Plastic Surgery Associates Surgery Center in San Mateo, California. Dmand AI also links Tammy Nguyen to 2 group practices and clinics and 2 medical groups.
What is Tammy Nguyen's office phone number?
The practice phone on file for Tammy Nguyen is (650) 348-5882.
What is Tammy Nguyen's medical license number?
Tammy Nguyen holds California license OPT 11827 TPA.
Does Tammy Nguyen accept Medicare?
Yes. CMS lists Tammy Nguyen as accepting Medicare assignment.
What is Tammy Nguyen's MIPS score?
Tammy Nguyen's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Tammy Nguyen see?
CMS counts 24 Medicare patients who saw Tammy Nguyen in 2024, with an average age of 79.
Has Tammy Nguyen received payments from drug or device companies?
CMS Open Payments shows $275 in general payments to Tammy Nguyen from 6 companies from 2025 to 2025. The largest total came from Abbvie Inc.
How long has Tammy Nguyen been practicing?
Tammy Nguyen graduated from medical school in 2000, 26 years ago.
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