Matthew Bay, P.A.
Physician Assistant · Oshkosh, WI
Matthew Bay, P.A. is a physician assistant with a practice address in Oshkosh, Wisconsin, and NPI 1033359401, issued on Feb 25, 2009. Check the license (Wisconsin 2387, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Matthew Bay
- Credential
- P.A.
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 2387 WI
2387-23 WI
Self-reported in NPPES; status is on the state search - Practice location
- 855 N Westhaven Dr, Oshkosh, WI 54904
- Phone
- (920) 303-8700
- Enumerated
- Feb 25, 2009
- Entity
- Type 1 · individual
Also registered at 855 N Westhaven Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rami Abumasmah, MDHematology & Oncology Physician1972779551
- Abdulmajid AdamHospitalist Physician1528362258
- Awais Ahmed, MDInternal Medicine Physician1316213481
- Kate Alexander, PA-CMedical Physician Assistant1700466414
- Hussein Alramini, M.D.Internal Medicine Physician1497106512
- Ammar Alzoubi, MDInternal Medicine Physician1598773152
Verify Matthew Bay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
74% fewer Medicare Part D claims than the average physician assistant in 2024
213 Medicare Part D claims for 87 beneficiaries, against an average of 832 among the 95,030 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 65 claims were for opioids.
Most prescribed
- Eliquis32 claims
- Oxycodone Hcl30 claims
- Hydrocodone-Acetaminophen27 claims
- Atorvastatin Calcium11 claims
- Diltiazem 24hr Er11 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.
One hospital or facility affiliation
- Fox Valley Surgical Associates LtdAppleton, WI
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
39 physician assistant records list a Oshkosh practice address
They are 39 of the 1,527 NPPES records with a Oshkosh practice address, and 3,317 physician assistant records in Wisconsin.
All 39 in Oshkosh → All 3,317 in Wisconsin → Every provider in Oshkosh →
Other physician assistant records in Wisconsin
- Amber Abraham, PA-CGreen Bay, WI1598993297
- Roopa AchuriNeenah, WI1225531635
- Carleen Acker, PA-CMadison, WI1447514773
- Lauren Ackerman, PA-CCudahy, WI1992357982
- Jocelyn Acompanado, PA-CSheboygan, WI1770521486
- Kora Adam, PA-CBurlington, WI1952666554
- Stephanie Adamczyk, PAMilwaukee, WI1063007441
- Kristen Adamo, PANew Berlin, WI1437179520
- Beth Adams, PA-CMequon, WI1801237540
- Eric Adams, PAGreen Bay, WI1528445087
Common questions
What is Matthew Bay, P.A.'s NPI number?
Matthew Bay, P.A.'s National Provider Identifier (NPI) is 1033359401, issued on Feb 25, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Bay, P.A. located?
The NPPES record lists a practice address at 855 N Westhaven Dr, Oshkosh, WI, 54904. Phone: (920) 303-8700. Providers update this record themselves, so call before visiting.
How can I verify Matthew Bay, P.A.'s license?
NPPES lists Wisconsin license number 2387, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Matthew Bay, P.A. prescribe under Medicare Part D?
In 2024, Matthew Bay, P.A. had 213 Medicare Part D claims for 87 beneficiaries; the average among physician assistant prescribers was 832. 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.