William Toan Nguyen, M.D.
Allergy & Immunology Physician · Redmond, WA
William Toan Nguyen, M.D. is an allergy & immunology physician with a practice address in Redmond, Washington, and NPI 1861445017, issued on May 18, 2006. Check the license (Washington MD61174262, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- William Toan Nguyen
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- MD61174262 WA
Self-reported in NPPES; status is on the state search - Practice location
- 8301 161St Ave NE Ste 308, Redmond, WA 98052
- Phone
- (206) 527-1200
- Enumerated
- May 18, 2006
- Record last updated
- Mar 26, 2024
- Medicare enrollment
- Enrolled (PECOS I20220329001148); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 90 in Washington → Look up another NPI →
Verify William Toan Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61174262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
603 Medicare Part D claims for 131 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Montelukast Sodium86 claims
- Trelegy Ellipta52 claims
- Albuterol Sulfate Hfa49 claims
- Fluticasone-Salmeterol47 claims
- Azelastine Hcl29 claims
- Breo Ellipta24 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: $13,474.87
89 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Bills Medicare through one group practice
- Northwest Asthma And Allergy CenterSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Toan Nguyen among 90 allergy & immunology physician records in Washington
William Toan Nguyen, M.D. is one of 90 allergy & immunology physician records with a practice address in Washington. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 40% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated1997 · median 2002 among the 46 with a school on file
- Record last updated2024 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Washington
There are 90 allergy & immunology physician records in Washington.
All 90 in Washington → Every provider in Redmond → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Michael Weiss, M.D.Redmond, WA 980521326075268
- Melanie Chong, M.D.Renton, WA 980551083977557
- Steven McClean, MD PCRenton, WA 980551780612887
- Jocelyn Cooper, MDSnoqualmie, WA 980651407485105
- Margaret Kim, M.D.Kirkland, WA 980331649632654
- Jennifer Regan, M.D., PH.DIssaquah, WA 980271548571284
- Jennifer Lee, MDMill Creek, WA 980121578577516
- Kevin Dooms, MDBellevue, WA 980041548226285
Common questions
What is William Toan Nguyen, M.D.'s NPI number?
William Toan Nguyen, M.D.'s National Provider Identifier (NPI) is 1861445017, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Toan Nguyen, M.D. located?
The NPPES record lists a practice address at 8301 161St Ave NE Ste 308, Redmond, WA, 98052. Phone: (206) 527-1200. Providers update this record themselves, so call before visiting.
How can I verify William Toan Nguyen, M.D.'s license?
NPPES lists Washington license number MD61174262, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Toan Nguyen, M.D. prescribe under Medicare Part D?
In 2024, William Toan Nguyen, M.D. had 603 Medicare Part D claims for 131 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
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.