Quoc Ai Nguyen, M.D.
Otolaryngic Allergy Physician · Garden Grove, CA
Quoc Ai Nguyen, M.D. is an otolaryngic allergy physician with a practice address in Garden Grove, California, and NPI 1659394419, issued on Jul 25, 2006. Check the license (California G75928, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Quoc Ai Nguyen
- Credential
- M.D.
- Primary taxonomy
- Otolaryngic Allergy Physician 207YX0602X
- License number
- G75928 CA
Self-reported in NPPES; status is on the state search - Practice location
- 13362 Brookhurst St, Garden Grove, CA 92843
- Phone
- (714) 534-4471
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 29, 2022
- Fax
- (714) 534-4481
- Medicaid ID
- 00G759280 CA
- Medicare enrollment
- Enrolled (PECOS I20090120000094); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1991
- Entity
- Type 1 · individual
Verify Quoc Ai Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G75928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average otolaryngic allergy physician in 2024
2,259 Medicare Part D claims for 481 beneficiaries, against an average of 867 among the 91 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Fluticasone Propionate673 claims
- Fluocinolone Acetonide Oil251 claims
- Azelastine Hcl231 claims
- Ofloxacin101 claims
- Omeprazole84 claims
- Pilocarpine Hcl73 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Otolaryngic Allergy Physician providers in California
There are 12 otolaryngic allergy physician records in California.
Other otolaryngic allergy physician records in California
- Naveen Bhandarkar, M.D.Orange, CA1205010360
- Donald Burt, MDMorgan Hill, CA1942244108
- Mary DereberyLos Angeles, CA1457440992
- Ivor Emanuel, MDSan Francisco, CA1649208612
- Sidney Fishman, MDNewport Beach, CA1417953043
- Akira Ishiyama, MDLos Angeles, CA1932125044
- Edward Kuan, MDOrange, CA1295091155
- David Liu, MDStanford, CA1427898089
- Marc Seftel, MDSanta Cruz, CA1457307761
- Nathalia Velasquez, M.DFremont, CA1477903987
Common questions
What is Quoc Ai Nguyen, M.D.'s NPI number?
Quoc Ai Nguyen, M.D.'s National Provider Identifier (NPI) is 1659394419, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Quoc Ai Nguyen, M.D. located?
The NPPES record lists a practice address at 13362 Brookhurst St, Garden Grove, CA, 92843. Phone: (714) 534-4471. Providers update this record themselves, so call before visiting.
How can I verify Quoc Ai Nguyen, M.D.'s license?
NPPES lists California license number G75928, 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 Quoc Ai Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Quoc Ai Nguyen, M.D. had 2,259 Medicare Part D claims for 481 beneficiaries; the average among otolaryngic allergy physician prescribers was 867. Part D covers Medicare prescriptions only.
What is Quoc Ai Nguyen, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.