Jan Wiacek, MD
Family Medicine Physician · Chicago, IL
Jan Wiacek, MD is a family medicine physician with a practice address in Chicago, Illinois, and NPI 1548263130, issued on May 27, 2005. Check the license (Illinois 036088918, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jan Wiacek
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036088918 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3204 N Oak Park Ave, Chicago, IL 60634
- Phone
- (773) 736-3131
- Enumerated
- May 27, 2005
- Record last updated
- Oct 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 036088918 IL
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 3204 N Oak Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Natalia Surowaniec, APNFamily Nurse Practitioner1871967869
Verify Jan Wiacek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036088918Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
32 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Famotidine13 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.
Jan Wiacek among 6,215 family medicine physician records in Illinois
Jan Wiacek, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2012 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,593 family medicine physician records list a practice address in Chicago
They are 1,593 of the 63,379 NPPES records with a practice address in Chicago, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Chicago → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Peter Calabrese, D.O.Chicago, IL 606341891766275
- James Daleo, MDChicago, IL 606341255314357
- Marek Gawrysz, MDChicago, IL 606341508818055
- Edward Ghislandi, MDChicago, IL 606341386623460
- Marian Kowalczyk, MDChicago, IL 606341740201664
- Beata Kowalczyk Budziakowska, MDChicago, IL 606341114952504
- Purchit Lacuesta, M.D.Chicago, IL 606341003887423
- Dulces Leon-Jauregui, MDChicago, IL 606341013999481
Common questions
What is Jan Wiacek, MD's NPI number?
Jan Wiacek, MD's National Provider Identifier (NPI) is 1548263130, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jan Wiacek, MD located?
The NPPES record lists a practice address at 3204 N Oak Park Ave, Chicago, IL, 60634. Phone: (773) 736-3131. Providers update this record themselves, so call before visiting.
How can I verify Jan Wiacek, MD's license?
NPPES lists Illinois license number 036088918, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jan Wiacek, MD prescribe under Medicare Part D?
In 2024, Jan Wiacek, MD had 32 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.