Gerald Wisniewski, MD
NPI 1164432647 · Internal Medicine Physician · Racine, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Wisniewski, MD is a Internal Medicine Physician provider in Racine, WI (NPI 1164432647).
Provider details
- NPI number
- 1164432647
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 19072 (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
19 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 · 42 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Metoprolol Succinate | 58 |
| Atorvastatin Calcium | 57 |
| Furosemide | 57 |
| Potassium Chloride | 53 |
| Levothyroxine Sodium | 43 |
| Triamcinolone Acetonide | 42 |
| Pantoprazole Sodium | 38 |
| Amlodipine Besylate | 30 |
| Losartan Potassium | 29 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gerald Wisniewski's NPI number?
- Gerald Wisniewski's National Provider Identifier (NPI) is 1164432647, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Wisniewski's specialty?
- Gerald Wisniewski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Wisniewski located?
- Gerald Wisniewski's practice location on file with NPPES is 1 Main St, Racine, WI 53403-1079.
- What is Gerald Wisniewski's phone number?
- The practice phone number listed in the NPPES registry for Gerald Wisniewski is (262) 687-6100.
- Does Gerald Wisniewski accept Medicare?
- Gerald Wisniewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Wisniewski's NPI active?
- Yes — Gerald Wisniewski's NPI (1164432647) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.