Ai (Theresa) Diem Nguyen, OD
- Medicare patients, 2024
- 121
- Part D claims, 2024
- 90
- MIPS score, 2024
- 90
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 3747 Sunset Lane, Antioch, CA 94509
- Practice phone
- Call (925) 754-2300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
California Eye Clinic
Surgery Center - Medicare-Certified · Antioch, California
Find Ai (Theresa) 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.
Ai (Theresa) Diem Nguyen is an optometrist in Antioch, California
Ai (Theresa) Nguyen practices at California Eye Clinic in Antioch, California.
Ai (Theresa) Nguyen's NPI, 1508857533, was assigned on October 31, 2005. Ai (Theresa) Nguyen graduated from Pennsylvania College of Optometry in 2000. Ai (Theresa) Nguyen holds California license OPT11481.
- NPI
- 1508857533NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951331156
- NPI enumeration date
- October 31, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (925) 754-2300
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Ai (Theresa) Diem Nguyen practices at California Eye Clinic in Antioch, California
Ai (Theresa) Nguyen's primary practice is California Eye Clinic, at 3747 Sunset Lane, Antioch, CA 94509. The practice phone is (925) 754-2300.
- California Eye Clinic3747 Sunset Lane, Antioch, CA 94509Phone(925) 754-2300
Source: Dmand AI Affiliation Data
Ai (Theresa) Diem Nguyen is affiliated with 2 sites of care and 2 medical groups
Ai (Theresa) Nguyen's primary practice is California Eye Clinic in Antioch, California. Dmand AI also links Ai (Theresa) Nguyen to 2 medical groups and 1 group practice or clinic, each named with a free account. Ai (Theresa) Nguyen's employer is on file too: a surgery center (asc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Ai (Theresa) Diem Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Ai (Theresa) Nguyen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| California Eye Clinic | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Ai (Theresa) Diem Nguyen is one of 7,206 optometrists in California
Optometrist is Ai (Theresa) Nguyen's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Ai (Theresa) Nguyen is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Ai (Theresa) 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
Ai (Theresa) Diem Nguyen treated 121 Medicare patients in 2024, average age 73
CMS counts 121 Medicare patients who saw Ai (Theresa) Nguyen in 2024. The largest group is 65 to 74, with 50 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 64% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Ai (Theresa) Nguyen's median patient age at 67, with 48% women.
Ai (Theresa) Nguyen's Medicare patients by age, 2024
Ai (Theresa) Nguyen's Medicare patients by sex, 2024
- Women8772%
- Men3428%
Chronic conditions among Ai (Theresa) Nguyen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis43%
- Diabetes36%
- Mood disorders23%
- Chronic kidney disease22%
- Depression22%
- Anxiety21%
Share of Medicare patients with each condition. A patient can have several.
Ai (Theresa) 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 67
Patient panel by sex, all payers
- Women48%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Ai (Theresa) Diem Nguyen wrote 90 Medicare Part D claims in 2024
In 2024, Ai (Theresa) Nguyen wrote 90 Medicare Part D claims for 45 patients. 50% of them were for generic drugs.
Ai (Theresa) Nguyen's Part D claims by kind of drug, 2024
- Generic45 claims50%
- Brand-name45 claims50%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Ai (Theresa) Diem Nguyen scored 90 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Ai (Theresa) Nguyen for performance year 2024, reported as part of a group. Ai (Theresa) Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Ai (Theresa) Nguyen's MIPS scores, performance year 2024
- 90of 100Final score
- 93.4of 100Quality
- 40of 100Improvement Activities
- 58of 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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Ai (Theresa) Diem Nguyen graduated from Pennsylvania College of Optometry
Ai (Theresa) Nguyen graduated from Pennsylvania College of Optometry in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Ai (Theresa) Diem 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 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) |
| 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 Ai (Theresa) Diem 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 Ai (Theresa) Diem Nguyen's NPI number?
Ai (Theresa) Diem Nguyen's NPI number is 1508857533. It was assigned on October 31, 2005, and it is active in the NPI Registry.
What does Ai (Theresa) Diem Nguyen specialize in?
Ai (Theresa) Diem Nguyen is an optometrist in Antioch, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Ai (Theresa) Diem Nguyen practice?
Ai (Theresa) Nguyen practices at 3747 Sunset Lane, Antioch, CA 94509. Ai (Theresa) Nguyen's primary practice is California Eye Clinic in Antioch, California. Dmand AI also links Ai (Theresa) Nguyen to 2 medical groups and 1 group practice or clinic.
What is Ai (Theresa) Diem Nguyen's office phone number?
The practice phone on file for Ai (Theresa) Nguyen is (925) 754-2300.
What is Ai (Theresa) Diem Nguyen's medical license number?
Ai (Theresa) Nguyen holds California license OPT11481.
Does Ai (Theresa) Diem Nguyen accept Medicare?
Yes. CMS lists Ai (Theresa) Nguyen as accepting Medicare assignment.
What is Ai (Theresa) Diem Nguyen's MIPS score?
Ai (Theresa) Nguyen's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.
How many Medicare patients does Ai (Theresa) Diem Nguyen see?
CMS counts 121 Medicare patients who saw Ai (Theresa) Nguyen in 2024, with an average age of 73.
Where did Ai (Theresa) Diem Nguyen go to medical school?
Ai (Theresa) Nguyen graduated from Pennsylvania College of Optometry in 2000.
How long has Ai (Theresa) Diem Nguyen been practicing?
Ai (Theresa) Nguyen graduated from medical school in 2000, 26 years ago.
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