Matthew Bay, P.A.
NPI 1033359401 · Surgical Physician Assistant · Appleton, WI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Bay, P.A. is a Surgical Physician Assistant provider in Appleton, WI (NPI 1033359401).
Provider details
- NPI number
- 1033359401
- Entity type
- Individual
- Primary specialty
- Surgical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 2387-23 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 32 | — |
| Oxycodone Hcl | 30 | 26 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 27 | 26 |
| Atorvastatin Calcium | 11 | — |
| Diltiazem Hclbrand: Diltiazem 24hr Er | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-02-25
- Last updated
- 2026-01-05
- Certified
- 2026-01-05
Frequently asked questions
- What is Matthew Bay's NPI number?
- Matthew Bay's National Provider Identifier (NPI) is 1033359401, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Bay's specialty?
- Matthew Bay is listed in the NPPES registry with a primary specialty of Surgical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Matthew Bay located?
- Matthew Bay's practice location on file with NPPES is 2000 E Milestone Dr, Appleton, WI 54913-6701.
- What is Matthew Bay's phone number?
- The practice phone number listed in the NPPES registry for Matthew Bay is (920) 731-8131.
- Does Matthew Bay accept Medicare?
- Matthew Bay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Bay's NPI active?
- Yes — Matthew Bay's NPI (1033359401) is active in the NPPES registry as of the last update on 2026-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.