Katherine Winiarczyk, MD
NPI 1841670726 · Internal Medicine Physician · Ladysmith, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Winiarczyk, MD is a Internal Medicine Physician provider in Ladysmith, WI (NPI 1841670726).
Provider details
- NPI number
- 1841670726
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 66082-20 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
11 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 152 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 388 | 103 |
| Atorvastatin Calcium | 379 | 94 |
| Levothyroxine Sodium | 370 | 79 |
| Furosemide | 344 | 62 |
| Amlodipine Besylate | 273 | 68 |
| Gabapentin | 266 | 60 |
| Losartan Potassium | 252 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$24 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1001 E 11th St NLadysmith, WI 54848-1455Phone: (715) 532-5546Fax: (715) 532-0296
Registry dates
- Enumerated
- 2015-06-04
- Last updated
- 2025-09-22
- Certified
- 2025-09-22
Frequently asked questions
- What is Katherine Winiarczyk's NPI number?
- Katherine Winiarczyk's National Provider Identifier (NPI) is 1841670726, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Winiarczyk's specialty?
- Katherine Winiarczyk is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Winiarczyk located?
- Katherine Winiarczyk's practice location on file with NPPES is 1200 Port Arthur Rd, Ladysmith, WI 54848-1137.
- What is Katherine Winiarczyk's phone number?
- The practice phone number listed in the NPPES registry for Katherine Winiarczyk is (715) 532-2300.
- Does Katherine Winiarczyk accept Medicare?
- Katherine Winiarczyk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Winiarczyk's NPI active?
- Yes — Katherine Winiarczyk's NPI (1841670726) is active in the NPPES registry as of the last update on 2025-09-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.