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THOMAS M KAZMIERCZAK JR. DO
NPI 1225033871
Obstetrics & Gynecology in Morris, IL

Active since June 20, 2005PECOS EnrolledAccepts Medicare Assignment
936 W US ROUTE 6, MORRIS, IL 60450(815) 942-0525(815) 942-3501 Get Directions Write a Review

NPPES record last updated: August 9, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 9, 2023, Jan 26, 2021, Aug 22, 2017 and 1 more (4 updates tracked since 2016).

About Thomas M Kazmierczak Jr. Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS M KAZMIERCZAK JR. DO (NPI 1225033871) is an individual obstetrics & gynecology provider in Morris, Illinois, licensed in Illinois (036107879) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS, is affiliated with Silver Cross Hospital And Medical Centers, and is a graduate of Other (2000).

NPPES Registry Identity

NPI1225033871
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameTHOMAS M KAZMIERCZAK JR.Credential: DO
Location Address936 W US ROUTE 6Morris, IL 60450-8858
Mailing AddressPo Box 713260Chicago, IL 60677-1260 · (630) 469-9200
Phone(815) 942-0525
Fax(815) 942-3501
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateJune 20, 2005
Last NPPES UpdateAugust 9, 20234 updates tracked since enumeration
NPPES CertifiedAugust 9, 2023
✔ NPI 1225033871 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in IL · 036107879
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
936 W US ROUTE 6, Morris, IL 60450
Open in Google Maps ↗

Other Identifiers 4

Other259912IL · Healthlink
Other3229984IL · Bcbs
Other020438IL · Health Alliance
Medicaid036107897IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Thomas M Kazmierczak Jr. Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698757227
PECOS Enrollment IDI20040607000259
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Thomas Kazmierczak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dupage Medical Group Ltd
40 mi
Multi-Specialty
1100 W 31ST ST, STE 300
Downers Grove, IL 60515
  • Reassigned Medicare billing, Illinois enrollment
  • 1,061 clinicians in this Medicare group
NPI 1801833983 (630) 469-9200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
24 services20 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Silver Cross Hospital And Medical Centers

Acute Care Hospitals · New Lenox, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140213
Location1900 Silver Cross BlvdNew Lenox, IL 60451 · Will County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60450 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
Established Patient
$68.64 typical visit price
range $17.16 – $136.56
Typical copayment $17.16 (range $4.29 – $34.14)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

PETER P VIENNE JR. DO
Obstetrics & Gynecology
936 W US ROUTE 6
MORRIS, IL 60450
Grundy County (815) 942-0525
ELITE GYNECOLOGY S.C.
Obstetrics & Gynecology
936 W US ROUTE 6
MORRIS, IL 60450
Grundy County (815) 942-0525

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Kazmierczak's NPI number?

The NPI number for Thomas Kazmierczak is 1225033871. It was assigned to this individual provider in the NPPES registry on June 20, 2005.

Where is Thomas Kazmierczak located?

Thomas Kazmierczak practices at 936 W Us Route 6, Morris, IL 60450. The listed phone number is (815) 942-0525.

What is Thomas Kazmierczak's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Thomas Kazmierczak enrolled in Medicare?

Yes. Thomas Kazmierczak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Thomas Kazmierczak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Kazmierczak reassigns Medicare benefits to Dupage Medical Group Ltd (Downers Grove, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Thomas Kazmierczak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Thomas Kazmierczak affiliated with any hospitals?

According to CMS data, Thomas Kazmierczak is affiliated with Silver Cross Hospital And Medical Centers.

When was this NPI record last updated?

The NPPES record for Thomas Kazmierczak was last updated on August 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.