Matthew Merwin
NPI 1801680517 · Internal Medicine Physician · Madison, WI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Merwin is a Internal Medicine Physician provider in Madison, WI (NPI 1801680517).
Provider details
- NPI number
- 1801680517
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 101677-851 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-04-07
- Last updated
- 2025-06-30
- Certified
- 2025-06-08
Frequently asked questions
- What is Matthew Merwin's NPI number?
- Matthew Merwin's National Provider Identifier (NPI) is 1801680517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Merwin's specialty?
- Matthew Merwin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Merwin located?
- Matthew Merwin's practice location on file with NPPES is Uw Hospitals and Clinics 600 Highland Ave, Madison, WI 53792-0001.
- What is Matthew Merwin's phone number?
- The practice phone number listed in the NPPES registry for Matthew Merwin is (608) 263-6400.
- Does Matthew Merwin accept Medicare?
- Matthew Merwin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Merwin's NPI active?
- Yes — Matthew Merwin's NPI (1801680517) is active in the NPPES registry as of the last update on 2025-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.