Ethan-Quan H. Nguyen, MD
Procedural Dermatology Physician · Riverside, CA
Ethan-Quan H. Nguyen, MD is a procedural dermatology physician with a practice address in Riverside, California, and NPI 1104828508, issued on Aug 15, 2005. Check the license (California G77748, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ethan-Quan H. Nguyen
- Credential
- MD
- Primary taxonomy
- Procedural Dermatology Physician 207NS0135X
- License number
- G77748 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4336 Market St, Riverside, CA 92501
- Phone
- (951) 682-9293
- Enumerated
- Aug 15, 2005
- Record last updated
- Aug 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040123000963); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest procedural dermatology physician records → All 120 in California → Look up another NPI →
Verify Ethan-Quan H. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77748Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average procedural dermatology physician in 2024
619 Medicare Part D claims for 220 beneficiaries, against an average of 713 among the 446 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Triamcinolone Acetonide67 claims
- Cephalexin66 claims
- Clobetasol Propionate56 claims
- Fluticasone Propionate30 claims
- Hydroxyzine Hcl30 claims
- Prednisone29 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,415.96
121 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 377 providers of this specialty with any payment received $10,439.11 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Ethan-Quan H. Nguyen among 120 procedural dermatology physician records in California
Ethan-Quan H. Nguyen, MD is one of 120 procedural dermatology physician records with a practice address in California. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1991 · median 1993 among the 62 with a school on file
- Record last updated2013 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207NS0135X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Procedural Dermatology Physician providers in California
There are 120 procedural dermatology physician records in California.
All 120 in California → Every provider in Riverside → Procedural Dermatology Physician nationwide →
The 8 procedural dermatology physician records with the nearest ZIP codes
- Jafar Koupaie, MDRiverside, CA 925031508940644
- Olivia Jenks, LPERiverside, CA 925061427893767
- Patricia BrennIrvine, CA 926121609281328
- Lina Kennedy, M.D.Corona Del Mar, CA 926251467719260
- Laila Elkeeb, MDNewport Beach, CA 926601023196649
- Tanya Foreman, M.D.Newport Beach, CA 926601497706113
- Kay Sung, M.D.Newport Beach, CA 926631336278720
- Christopher Carlin, M.D.San Clemente, CA 926731336186493
Common questions
What is Ethan-Quan H. Nguyen, MD's NPI number?
Ethan-Quan H. Nguyen, MD's National Provider Identifier (NPI) is 1104828508, issued on Aug 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ethan-Quan H. Nguyen, MD located?
The NPPES record lists a practice address at 4336 Market St, Riverside, CA, 92501. Phone: (951) 682-9293. Providers update this record themselves, so call before visiting.
How can I verify Ethan-Quan H. Nguyen, MD's license?
NPPES lists California license number G77748, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ethan-Quan H. Nguyen, MD prescribe under Medicare Part D?
In 2024, Ethan-Quan H. Nguyen, MD had 619 Medicare Part D claims for 220 beneficiaries; the average among procedural dermatology physician prescribers was 713. Part D covers Medicare prescriptions only.
What is Ethan-Quan H. Nguyen, MD's MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.