Cynthia Ong Nguyen, PA-C
- Medicare services, 2024
- 969
- Medicare patients, 2024
- 278
- Part D claims, 2024
- 496
- Industry payments
- $1,910
- Affiliated sites
- 2
- Practice address
- 4300 Rose Dr, Yorba Linda, CA 92886
- Practice phone
- Call (714) 449-4900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Providence Medical Foundation
Yorba Linda, California
Find Cynthia Nguyen's professional email, personal email and mobile number
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Cynthia Ong Nguyen is a physician assistant in Yorba Linda, California
Cynthia Nguyen practices at Providence Medical Foundation in Yorba Linda, California.
Cynthia Nguyen's NPI, 1922775121, was assigned on August 25, 2021. Cynthia Nguyen holds California license 60499.
- NPI
- 1922775121NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264811355
- NPI enumeration date
- August 25, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 449-4900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Cynthia Ong Nguyen practices at Providence Medical Foundation in Yorba Linda, California
Cynthia Nguyen's primary practice is Providence Medical Foundation, at 4300 Rose Dr, Yorba Linda, CA 92886 in Orange County. The practice phone is (714) 449-4900.
- Providence Medical Foundation4300 Rose Dr, Yorba Linda, CA 92886 · Orange CountyPhone(714) 449-4900
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Cynthia Ong Nguyen is affiliated with 3 sites of care and 2 medical groups
Cynthia Nguyen's primary practice is Providence Medical Foundation in Yorba Linda, California. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Cynthia Nguyen to 2 more group practices and clinics and 1 medical group, 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 Cynthia Ong Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Cynthia Nguyen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Medical Foundation | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Cynthia Ong Nguyen is one of 11,482 physician assistants in California
Physician assistant is Cynthia Nguyen's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Cynthia Nguyen is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Clinical focus
Dmand AI lists acute skin infection, ankle or foot injury, benign or precancerous skin growths, contact dermatitis, rash and skin discoloration among the conditions Cynthia Nguyen treats.
Physician assistants near Cynthia Nguyen
Counts of physician assistants 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
Cynthia Ong Nguyen billed Medicare for 969 services in 2024
CMS data shows 969 Medicare services from Cynthia Nguyen across 12 procedure codes in 2024, for 278 Medicare patients. Medicare paid $39,537 for them. Every service was in an office.
Cynthia Nguyen's Medicare services by type, 2024
- Surgery684
- Office and hospital visits285
Cynthia Nguyen compared with the California median for physician assistants, 2024
- Cynthia Nguyen
- California median
- Medicare services
- 969vs 2044.8 times
- Medicare patients
- 278vs 1052.6 times
- Part D claims
- 396vs 24363% above
Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.
Cynthia 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
Cynthia Ong Nguyen treated 278 Medicare patients in 2024, average age 76
CMS counts 278 Medicare patients who saw Cynthia Nguyen in 2024. The largest group is 65 to 74, with 132 patients. 75% of them have high cholesterol, and 64% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Cynthia Nguyen's median patient age at 63, with 64% women.
Cynthia Nguyen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Cynthia Nguyen's Medicare patients by sex, 2024
- Women15756%
- Men12144%
Chronic conditions among Cynthia Nguyen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure64%
- Arthritis49%
- Osteoporosis25%
- Chronic kidney disease22%
- Ischemic heart disease21%
- Mood disorders21%
- Diabetes20%
Share of Medicare patients with each condition. A patient can have several.
Cynthia 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
- Women64%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Cynthia Ong Nguyen wrote 496 Medicare Part D claims in 2024
In 2024, Cynthia Nguyen wrote 496 Medicare Part D claims for 247 patients. 96% of them were for generic drugs. CMS names the drug for 396 of them, across 10 drugs with 11 or more claims each, at $7,586 in total drug cost.
Cynthia Nguyen's Part D claims by kind of drug, 2024
- Generic476 claims96%
- Brand-name20 claims4%
Cynthia 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 Cynthia Nguyen's Part D claims, 2024
- Antibiotics6%29 of 496 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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 Cynthia Ong Nguyen takes part in Medicare
Cynthia 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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Cynthia Ong Nguyen received $1,910 in industry payments from 2024 to 2025
CMS Open Payments shows 67 general payments to Cynthia Nguyen from 13 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 95% of the total. Abbvie Inc. paid the most, $569.
General payments to Cynthia Nguyen by program year, 2024 to 2025
General payments to Cynthia Nguyen by kind, 2024 to 2025
- Food and beverage$1,81095%
- Education$1005%
Companies that paid Cynthia Nguyen the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Cynthia Ong 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) |
| 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 Cynthia Ong 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 Cynthia Ong Nguyen's NPI number?
Cynthia Ong Nguyen's NPI number is 1922775121. It was assigned on August 25, 2021, and it is active in the NPI Registry.
What does Cynthia Ong Nguyen specialize in?
Cynthia Ong Nguyen is a physician assistant in Yorba Linda, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Cynthia Ong Nguyen practice?
Cynthia Nguyen practices at 4300 Rose Dr, Yorba Linda, CA 92886. Cynthia Nguyen's primary practice is Providence Medical Foundation in Yorba Linda, California. Dmand AI also links Cynthia Nguyen to 2 group practices and clinics and 1 medical group.
What is Cynthia Ong Nguyen's office phone number?
The practice phone on file for Cynthia Nguyen is (714) 449-4900.
What is Cynthia Ong Nguyen's medical license number?
Cynthia Nguyen holds California license 60499.
What medical group is Cynthia Ong Nguyen part of?
Cynthia Nguyen is linked to St. Jude Heritage Medical Group. Dmand AI links Cynthia Nguyen to 1 more medical group.
Does Cynthia Ong Nguyen accept Medicare?
Yes. CMS data shows Cynthia Nguyen billed Medicare for 969 services in 2024, and Cynthia Nguyen accepts Medicare assignment.
How many Medicare patients does Cynthia Ong Nguyen see?
CMS counts 278 Medicare patients who saw Cynthia Nguyen in 2024, with an average age of 76.
What services does Cynthia Ong Nguyen bill to Medicare?
In 2024, Cynthia Nguyen's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
What drugs does Cynthia Ong Nguyen prescribe most?
In 2024 Medicare Part D data, Cynthia Nguyen's most prescribed drugs by claims were Ketoconazole, Mupirocin and Fluocinonide.
Has Cynthia Ong Nguyen received payments from drug or device companies?
CMS Open Payments shows $1,910 in general payments to Cynthia Nguyen from 13 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Cynthia Ong Nguyen been practicing?
Cynthia Nguyen graduated from medical school in 2021, 5 years ago.
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