William A. Portuese, M.D.
Otolaryngology Physician · Seattle, WA
William A. Portuese, M.D. is an otolaryngology physician with a practice address in Seattle, Washington, and NPI 1649268210, issued on Oct 7, 2005. Check the license (Washington MD00028539, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- William A. Portuese
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- MD00028539 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Madison St, Seattle, WA 98104
- Phone
- (206) 624-6200
- Enumerated
- Oct 7, 2005
- Record last updated
- Jun 24, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (206) 624-0244
- Medicaid ID
- 8128381 WA
- Medicare enrollment
- Enrolled (PECOS I20070719000019); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 305 in Washington → Look up another NPI →
Also registered at 1101 Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sonal Avasare, M.D.Pediatric Nephrology Physician1811196686
- Ralph Aye, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1982788600
- Robert Ballard, MDOtolaryngology Physician1508854449
Verify William A. Portuese in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00028539Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average otolaryngology physician in 2024
77 Medicare Part D claims for 25 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Azithromycin18 claims
- Oxycodone-Acetaminophen11 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.
Bills Medicare through one group practice
- Aesthetic Associates Inc P SSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William A. Portuese among 305 otolaryngology physician records in Washington
William A. Portuese, M.D. is one of 305 otolaryngology physician records with a practice address in Washington. 75% 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, 90% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1985 · median 2007 among the 198 with a school on file
- Record last updated2010 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Washington
There are 305 otolaryngology physician records in Washington.
All 305 in Washington → Every provider in Seattle → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Robert Ballard, MDSeattle, WA 981041508854449
- Dewayne Bradley, MDSeattle, WA 981041144339276
- Mien-Chi Chen, M.D.Seattle, WA 981041407822679
- Felix Chu, MDSeattle, WA 981041568496123
- Fred Herzon, M.D.Seattle, WA 981041558346072
- Namou Kim, MDSeattle, WA 981041336125798
- Calvin Knapp, MDSeattle, WA 981041841258019
- Thomas Lamperti, MDSeattle, WA 981041780673392
Common questions
What is William A. Portuese, M.D.'s NPI number?
William A. Portuese, M.D.'s National Provider Identifier (NPI) is 1649268210, issued on Oct 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William A. Portuese, M.D. located?
The NPPES record lists a practice address at 1101 Madison St, Seattle, WA, 98104. Phone: (206) 624-6200. Providers update this record themselves, so call before visiting.
How can I verify William A. Portuese, M.D.'s license?
NPPES lists Washington license number MD00028539, 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 A. Portuese, M.D. prescribe under Medicare Part D?
In 2024, William A. Portuese, M.D. had 77 Medicare Part D claims for 25 beneficiaries; the average among otolaryngology physician prescribers was 541. 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.