Karolina Stack, M.D.
Pediatrics Physician · Oshkosh, WI
Karolina Stack, M.D. is a pediatrics physician with a practice address in Oshkosh, Wisconsin, and NPI 1053842443, issued on Mar 27, 2017. Check the license (Wisconsin 83243, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Karolina Stack
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- 83243 WI
036.151998 IL
1053842243 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2700 W 9TH Ave Ste 211, Oshkosh, WI 54904
- Phone
- (920) 223-8000
- Enumerated
- Mar 27, 2017
- Record last updated
- Jun 30, 2025
- Medicaid ID
- 100273308 WI
- Medicare enrollment
- Enrolled (PECOS I20240515004175); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 1,203 in Wisconsin → Look up another NPI →
Verify Karolina Stack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 83243Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Ascension Medical Group-Fox Valley Wisconsin IncOshkosh, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karolina Stack among 1,203 pediatrics physician records in Wisconsin
Karolina Stack, M.D. is one of 1,203 pediatrics physician records with a practice address in Wisconsin. 20% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 78% of them.
- NPI issued2017 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 20% of these records are
- In the CMS Doctors and Clinicians fileYes · 12% of these records are
- Graduated2017 · median 2012 among the 142 with a school on file
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Wisconsin
There are 1,203 pediatrics physician records in Wisconsin.
All 1,203 in Wisconsin → Every provider in Oshkosh → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Andrew Collins, MDOshkosh, WI 549041730197187
- Matthew Downs, M.D.Oshkosh, WI 549041376651596
- Scott Johnson, MDOshkosh, WI 549041215045836
- Vee Ly, MDOshkosh, WI 549041336256882
- Laurie Muller, MDOshkosh, WI 549041962496869
- Jelena Shadick, M.D.Oshkosh, WI 549041316331960
- Jean Thur, DOOshkosh, WI 549041306953419
- Valerie Zapolsky, MDOshkosh, WI 549041942319637
Common questions
What is Karolina Stack, M.D.'s NPI number?
Karolina Stack, M.D.'s National Provider Identifier (NPI) is 1053842443, issued on Mar 27, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Karolina Stack, M.D. located?
The NPPES record lists a practice address at 2700 W 9TH Ave Ste 211, Oshkosh, WI, 54904. Phone: (920) 223-8000. Providers update this record themselves, so call before visiting.
How can I verify Karolina Stack, M.D.'s license?
NPPES lists Wisconsin license number 83243, 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.
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.