Dr. Ethan-Quan H. Nguyen, MD
- Medicare patients, 2024
- 394
- Part D claims, 2024
- 619
- Industry payments
- $856
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 4336 Market St, Riverside, CA 92501-3518
- Practice phone
- Call (951) 682-9293
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Raincross Dermatology & Cosmetic Surgery
Physician office · Riverside, 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. Ethan-Quan H. Nguyen is a procedural dermatology physician in Riverside, California
Dr. Nguyen practices at Raincross Dermatology & Cosmetic Surgery in Riverside, California.
Dr. Nguyen's NPI is 1104828508. Dr. Nguyen graduated from Georgetown University School of Medicine in 1991. Dr. Nguyen holds California license G77748.
- NPI
- 1104828508NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820990377
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 682-9293
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ethan-Quan H. Nguyen practices at Raincross Dermatology & Cosmetic Surgery in Riverside, California
Dr. Nguyen's primary practice is Raincross Dermatology & Cosmetic Surgery, at 4336 Market St, Riverside, CA 92501-3518. The practice phone is (951) 682-9293.
- Raincross Dermatology & Cosmetic Surgery4336 Market St, Riverside, CA 92501-3518Phone(951) 682-9293
Source: Dmand AI Affiliation Data
Dr. Ethan-Quan H. Nguyen is affiliated with 1 site of care
Dr. Nguyen's primary practice is Raincross Dermatology & Cosmetic Surgery in Riverside, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ethan-Quan H. Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Raincross Dermatology & Cosmetic Surgery | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ethan-Quan H. Nguyen is one of 101 procedural dermatology physicians in California
Procedural dermatology is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207NS0135X. Dr. Nguyen is licensed in California.
Specialties and state licenses
- Procedural dermatology, CaliforniaPrimary
Procedural dermatology physicians near Dr. Nguyen
Counts of procedural dermatology physicians 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. Ethan-Quan H. Nguyen treated 394 Medicare patients in 2024, average age 77
CMS counts 394 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 75 to 84, with 186 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.28, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nguyen's median patient age at 58, with 58% women.
Dr. Nguyen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nguyen's Medicare patients by sex, 2024
- Women17745%
- Men21755%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Chronic kidney disease31%
- Diabetes30%
- Ischemic heart disease30%
- Mood disorders19%
- Atrial fibrillation18%
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 58
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ethan-Quan H. Nguyen wrote 619 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 619 Medicare Part D claims for 220 patients. 86% of them were for generic drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic530 claims86%
- Brand-name89 claims14%
Drug classes CMS tracks in Dr. Nguyen's Part D claims, 2024
- Antibiotics20%126 of 619 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ethan-Quan H. Nguyen scored 0 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 0 out of 100 for Dr. Nguyen for performance year 2024, reported individually. Dr. Nguyen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 90 procedures of melanoma (skin cancer) excision by Dr. Nguyen, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Nguyen's MIPS scores, performance year 2024
- 0of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 0of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Nguyen ranks in Medicare procedure volume
- Removal of skin lesions
- 84th percentile384 procedures
- Removal of skin cancer
- 31st percentile178 procedures
- Skin biopsy
- 82nd percentile160 procedures
- Melanoma (skin cancer) excision
- 92nd percentile90 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ethan-Quan H. Nguyen received $856 in industry payments in 2025
CMS Open Payments shows 37 general payments to Dr. Nguyen from 10 drug and device companies in 2025. Food and beverage make up the largest share, 90% of the total. Abbvie Inc. paid the most, $368.
General payments to Dr. Nguyen by kind, 2025 to 2025
- Food and beverage$77190%
- Education$8510%
Companies that paid Dr. 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
Dr. Ethan-Quan H. Nguyen graduated from Georgetown University School of Medicine
Dr. Nguyen graduated from Georgetown University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ethan-Quan H. 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 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)Doctors and Clinicians Utilization Data (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. Ethan-Quan H. 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. Ethan-Quan H. Nguyen's NPI number?
Dr. Ethan-Quan H. Nguyen's NPI number is 1104828508. It is active in the NPI Registry.
What kind of doctor is Dr. Ethan-Quan H. Nguyen?
Dr. Ethan-Quan H. Nguyen is a procedural dermatology physician in Riverside, California. The primary specialty in the NPI Registry is Procedural Dermatology Physician (taxonomy code 207NS0135X).
Where does Dr. Ethan-Quan H. Nguyen practice?
Dr. Nguyen practices at 4336 Market St, Riverside, CA 92501-3518. Dr. Nguyen's primary practice is Raincross Dermatology & Cosmetic Surgery in Riverside, California.
What is Dr. Ethan-Quan H. Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (951) 682-9293.
What is Dr. Ethan-Quan H. Nguyen's medical license number?
Dr. Nguyen holds California license G77748.
Does Dr. Ethan-Quan H. Nguyen accept Medicare?
Yes. CMS lists Dr. Nguyen as accepting Medicare assignment.
What is Dr. Ethan-Quan H. Nguyen's MIPS score?
Dr. Nguyen's MIPS final score for performance year 2024 is 0 out of 100, reported individually.
How many Medicare patients does Dr. Ethan-Quan H. Nguyen see?
CMS counts 394 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 77.
Where did Dr. Ethan-Quan H. Nguyen go to medical school?
Dr. Nguyen graduated from Georgetown University School of Medicine in 1991.
Has Dr. Ethan-Quan H. Nguyen received payments from drug or device companies?
CMS Open Payments shows $856 in general payments to Dr. Nguyen from 10 companies from 2025 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Ethan-Quan H. Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1991, 35 years ago.
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