Katherine Suzanne Winiarczyk, MD
Internal Medicine Physician · Ladysmith, WI
Katherine Suzanne Winiarczyk, MD is an internal medicine physician with a practice address in Ladysmith, Wisconsin, and NPI 1841670726, issued on Jun 4, 2015. Check the license (Wisconsin 66082-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Suzanne Winiarczyk
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 66082-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1200 Port Arthur RD, Ladysmith, WI 54848
- Phone
- (715) 532-2300
- Enumerated
- Jun 4, 2015
- Record last updated
- Sep 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20190214002252); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 1200 Port Arthur RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kellsey Fellbaum, DNP, FNP-BCFamily Nurse Practitioner1811584147
- Kryselle Geroy, PTPhysical Therapist1245538768
- Amber Hall, NPFamily Nurse Practitioner1174308019
- Ernest Hall, NPPsychiatric/Mental Health Nurse Practitioner1245015171
Verify Katherine Suzanne Winiarczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 66082-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,075 Medicare Part D claims for 491 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 234 claims were for opioids.
Most prescribed
- Lisinopril388 claims
- Atorvastatin Calcium379 claims
- Levothyroxine Sodium370 claims
- Furosemide344 claims
- Amlodipine Besylate273 claims
- Gabapentin266 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $24.26
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mchs Hospitals IncMarshfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine Suzanne Winiarczyk among 2,078 internal medicine physician records in Wisconsin
Katherine Suzanne Winiarczyk, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2015 · median 2002 among the 1,098 with a school on file
- Record last updated2025 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Wisconsin
There are 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Ladysmith → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zahid Hameed, MDLake Nebagamon, WI 548491508818469
- Jemstone Bathe, M.D.Rice Lake, WI 548681063945483
- William Carpenter, MDRice Lake, WI 548681275638900
- Srinivas Chetty, MDRice Lake, WI 548681982711255
- Vidya Sagar Reddy Cirra, MDRice Lake, WI 548681124339593
- Leland Crandall, MDRice Lake, WI 548681467552836
- Conrad Eastwold, MDRice Lake, WI 548681780791046
- Jin Ha Kim, MDRice Lake, WI 548681215174859
Common questions
What is Katherine Suzanne Winiarczyk, MD's NPI number?
Katherine Suzanne Winiarczyk, MD's National Provider Identifier (NPI) is 1841670726, issued on Jun 4, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Suzanne Winiarczyk, MD located?
The NPPES record lists a practice address at 1200 Port Arthur RD, Ladysmith, WI, 54848. Phone: (715) 532-2300. Providers update this record themselves, so call before visiting.
How can I verify Katherine Suzanne Winiarczyk, MD's license?
NPPES lists Wisconsin license number 66082-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Katherine Suzanne Winiarczyk, MD prescribe under Medicare Part D?
In 2024, Katherine Suzanne Winiarczyk, MD had 10,075 Medicare Part D claims for 491 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Katherine Suzanne Winiarczyk, MD's MIPS final score?
The 2023 MIPS final score is 78.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 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.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.