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THOMAS KENNETH GRUDOWSKI
NPI 1508326745
Emergency Medicine in Downers Grove, IL

Active since March 22, 2019PECOS EnrolledAccepts Medicare Assignment
3815 HIGHLAND AVE, DOWNERS GROVE, IL 60515(708) 275-5900 Get Directions Write a Review

NPPES record last updated: July 26, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 22, 2022, Apr 27, 2022, Mar 22, 2019 (3 updates tracked since 2019).

About Thomas Kenneth Grudowski NPPES

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

THOMAS KENNETH GRUDOWSKI (NPI 1508326745) is an individual emergency medicine provider in Downers Grove, Illinois, licensed in Illinois (036-157973) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Advocate Good Samaritan Hospital, and maintains a secondary practice location in Oak Lawn.

NPPES Registry Identity

NPI1508326745
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameTHOMAS KENNETH GRUDOWSKI
Location Address3815 HIGHLAND AVEDowners Grove, IL 60515-1500
Mailing Address29373 Network PlChicago, IL 60673-2827 · (847) 390-5900
Phone(708) 275-5900
Sole ProprietorNo
Medical School CMSMidwestern University, Chicago College Of Osteopathic MedGraduated 2019
Enumeration DateMarch 22, 2019
Last NPPES UpdateJuly 26, 20253 updates tracked since enumeration
NPPES CertifiedJuly 26, 2025
✔ NPI 1508326745 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in IL · 036-157973
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
3815 HIGHLAND AVE, Downers Grove, IL 60515
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Secondary Practice Location 1

Location 14440 W 95th StOak Lawn, IL 60453-2600 · Phone (708) 684-8000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

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 Kenneth Grudowski 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 ID6305223082
PECOS Enrollment IDI20220804003252
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 Reassignments

4

Medicare enrollment records show Thomas Grudowski reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advocate Health And Hospitals Corporation
Same address
General Acute Care Hospital
3815 HIGHLAND AVE
Downers Grove, IL 60515
  • Reassigned Medicare billing, Illinois enrollment
  • 4,870 clinicians in this Medicare group
NPI 1578670543 (630) 275-5900
Dupage Emergency Physicians Ltd
0.1 mi
Emergency Medicine
3815 HIGHLAND AVE
Downers Grove, IL 60515
  • Reassigned Medicare billing, Illinois enrollment
  • 36 clinicians in this Medicare group
NPI 1255323481 (630) 275-5900
Dupage Emergency Physicians Convenient Care LLC
11 mi
Emergency Medicine
15900 127TH ST
Lemont, IL 60439
  • Reassigned Medicare billing, Illinois enrollment
  • 54 clinicians in this Medicare group
NPI 1922000363 (630) 243-7100
Em Strategies,ltd.
19 mi
Emergency Medicine
1900 SILVER CROSS BLVD
New Lenox, IL 60451
  • Reassigned Medicare billing, Illinois enrollment
  • 66 clinicians in this Medicare group
NPI 1679791834 (815) 300-1100

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 4

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
497 services475 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
164 services161 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
128 services127 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
90 services86 patients

Hospital Affiliations CMS Care Compare

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

Advocate Good Samaritan Hospital

Acute Care Hospitals · Downers Grove, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140288
Location3815 Highland AvenueDowners Grove, IL 60515 · Du Page County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60515 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
Most-billed visit code 99214
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 20

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

STEPHANIE WOLFF PA-C
Physician Assistant
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 275-5900
ABIGAIL MAZUREK
Physical Therapist
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 275-5900
DR. MICHAEL J IWANICKI D.O.
Surgery
3815 HIGHLAND AVE, TOWER 2, SUITE 107
DOWNERS GROVE, IL 60515
Dupage County (630) 275-7800
TRAUMA AND SURGICAL SPECIALISTS OF DUPAGE, LLC
Surgery
3815 HIGHLAND AVE, TOWER 2, SUITE 107
DOWNERS GROVE, IL 60515
Dupage County (630) 275-7800
DR. JUSTIN GRIFFITH MILLER M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 324-7913
ZACHARY JOHN BASTIAN M.D.
Anesthesiology
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 275-5900
MANISA BAKER APN
Clinical Nurse Specialist (Acute Care)
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 275-5900
MARY SUE DAILEY APRN
Clinical Nurse Specialist (Adult Health)
3815 HIGHLAND AVE
DOWNERS GROVE, IL 60515
Dupage County (630) 275-5900

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 Grudowski's NPI number?

The NPI number for Thomas Grudowski is 1508326745. It was assigned to this individual provider in the NPPES registry on March 22, 2019.

Where is Thomas Grudowski located?

Thomas Grudowski practices at 3815 Highland Ave, Downers Grove, IL 60515. The listed phone number is (708) 275-5900.

What is Thomas Grudowski's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Thomas Grudowski enrolled in Medicare?

Yes. Thomas Grudowski 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 organizations bill Medicare for Thomas Grudowski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Grudowski reassigns Medicare benefits to 4 organizations: Advocate Health And Hospitals Corporation (Downers Grove, IL), Dupage Emergency Physicians Ltd (Downers Grove, IL), Dupage Emergency Physicians Convenient Care LLC (Lemont, IL) and Em Strategies,ltd. (New Lenox, IL). Each 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 Grudowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Grudowski accept?

Health plans from Oscar Health list Thomas Grudowski as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Thomas Grudowski affiliated with any hospitals?

According to CMS data, Thomas Grudowski is affiliated with Advocate Good Samaritan Hospital.

When was this NPI record last updated?

The NPPES record for Thomas Grudowski was last updated on July 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.