Roger Nguyen, M.D
Allergy Physician · Garden Grove, CA
Roger Nguyen, M.D is an allergy physician with a practice address in Garden Grove, California, and NPI 1982625430, issued on Jul 21, 2006. Check the license (California A68125, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roger Nguyen
- Credential
- M.D
- Primary taxonomy
- Allergy Physician 207KA0200X
- License number
- A68125 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9746 Westminster Ave Ste A, Garden Grove, CA 92844
- Phone
- (714) 638-4433
- Enumerated
- Jul 21, 2006
- Entity
- Type 1 · individual
Verify Roger Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A68125Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
45% fewer Medicare Part D claims than the average allergy physician in 2024
445 Medicare Part D claims for 115 beneficiaries, against an average of 805 among the 637 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Levocetirizine Dihydrochloride134 claims
- Triamcinolone Acetonide45 claims
- Azelastine Hcl34 claims
- Ipratropium Bromide28 claims
- Montelukast Sodium27 claims
- Mometasone Furoate24 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.
Industry payments in 2024: $2,161.59
73 payments, mostly food and beverage; the largest payer was Genzyme Corporation. The 486 providers of this specialty with any payment received $7,736.70 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.
Allergy Physician providers in California
There are 160 allergy physician records in California.
Other allergy physician records in California
- Shilpi Anand, M.D.Walnut Creek, CA1871556605
- Paula Ardron, MDBakersfield, CA1851468789
- Tania Aung, M.D.Vacaville, CA1760654263
- Julia Bae, MDBakersfield, CA1821169897
- Sally Bailey, MDSan Ramon, CA1700815677
- Jeffrey Balduzzi, M.D.Stockton, CA1235405952
- Lori Banka, D.O.Torrance, CA1235419342
- Muhammad Bashir, MDPalo Alto, CA1053613711
- Gillian Bassirpour, MDAliso Viejo, CA1811216765
- Maxine Baum, M.D.Los Angeles, CA1568689594
Common questions
What is Roger Nguyen, M.D's NPI number?
Roger Nguyen, M.D's National Provider Identifier (NPI) is 1982625430, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger Nguyen, M.D located?
The NPPES record lists a practice address at 9746 Westminster Ave Ste A, Garden Grove, CA, 92844. Phone: (714) 638-4433. Providers update this record themselves, so call before visiting.
How can I verify Roger Nguyen, M.D's license?
NPPES lists California license number A68125, 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 Roger Nguyen, M.D prescribe under Medicare Part D?
In 2024, Roger Nguyen, M.D had 445 Medicare Part D claims for 115 beneficiaries; the average among allergy physician prescribers was 805. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.