Thomas M. Kazmierczak, DO
Obstetrics & Gynecology Physician · Morris, IL
Thomas M. Kazmierczak, DO is an obstetrics & gynecology physician with a practice address in Morris, Illinois, and NPI 1225033871, issued on Jun 20, 2005. Check the license (Illinois 036107879, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas M. Kazmierczak
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 036107879 IL
Self-reported in NPPES; status is on the state search - Practice location
- 936 W US Route 6, Morris, IL 60450
- Phone
- (815) 942-0525
- Enumerated
- Jun 20, 2005
- Record last updated
- Aug 9, 2023
- Fax
- (815) 942-3501
- Medicaid ID
- 036107897 IL
- Medicare enrollment
- Enrolled (PECOS I20040607000259); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 2,062 in Illinois → Look up another NPI →
Also registered at 936 W US Route 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Vienne, DOObstetrics & Gynecology Physician1518962174
Verify Thomas M. Kazmierczak 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 036107879Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
114 Medicare Part D claims for 33 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol24 claims
- Levothyroxine Sodium11 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.
Bills Medicare through one group practice
- Dupage Medical Group LtdTinley Park, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas M. Kazmierczak among 2,062 obstetrics & gynecology physician records in Illinois
Thomas M. Kazmierczak, DO is one of 2,062 obstetrics & gynecology physician records with a practice address in Illinois. 72% 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, 88% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2000 · median 2006 among the 1,168 with a school on file
- Record last updated2023 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 obstetrics & gynecology physician records list a practice address in Morris
They are 9 of the 385 NPPES records with a practice address in Morris, and 2,062 obstetrics & gynecology physician records in Illinois.
All 2,062 in Illinois → Every provider in Morris → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Rosa Aramburo Paredes, MDMorris, IL 604501689178360
- Andrea Chen, MDMorris, IL 604501235395492
- Mary Fitzgibbon, MDMorris, IL 604501629002464
- Mark Kijek, MD SCMorris, IL 604501659336519
- Victoria Ochoa, DOMorris, IL 604501396907606
- Leticia Setrini-Best, M.D.Morris, IL 604501235113812
- Douglas Toussaint, D.O.Morris, IL 604501710984901
- Peter Vienne, DOMorris, IL 604501518962174
Common questions
What is Thomas M. Kazmierczak, DO's NPI number?
Thomas M. Kazmierczak, DO's National Provider Identifier (NPI) is 1225033871, issued on Jun 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas M. Kazmierczak, DO located?
The NPPES record lists a practice address at 936 W US Route 6, Morris, IL, 60450. Phone: (815) 942-0525. Providers update this record themselves, so call before visiting.
How can I verify Thomas M. Kazmierczak, DO's license?
NPPES lists Illinois license number 036107879, 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 Thomas M. Kazmierczak, DO prescribe under Medicare Part D?
In 2024, Thomas M. Kazmierczak, DO had 114 Medicare Part D claims for 33 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.