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DR. KARL MICHAEL NAPEKOSKI M.D.
NPI 1235372301
Pathology - Anatomic Pathology & Clinical Pathology in Downers Grove, IL

Active since April 19, 2009PECOS EnrolledAccepts Medicare Assignment
3815 HIGHLAND AVE, DOWNERS GROVE, IL 60515(630) 275-1027 Get Directions Write a Review

NPPES record last updated: April 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 23, 2026, Dec 15, 2025 (2 updates tracked since 2025).

About Dr. Karl Michael Napekoski M.d. NPPES

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

DR. KARL MICHAEL NAPEKOSKI M.D. (NPI 1235372301) is an individual anatomic pathology & clinical pathology provider in Downers Grove, Illinois, licensed in Illinois (036.134795) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with Advocate Sherman Hospital, and maintains a secondary practice location in La Grange Highlands.

NPPES Registry Identity

NPI1235372301
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameDR. KARL MICHAEL NAPEKOSKICredential: M.D.
Location Address3815 HIGHLAND AVEDowners Grove, IL 60515-1500
Mailing Address145 W Bailey RdNaperville, IL 60565-4199 · (937) 416-8229
Phone(630) 275-1027
Sole ProprietorYes
Medical School CMSOtherGraduated 2009
Enumeration DateApril 19, 2009
Last NPPES UpdateApril 23, 20262 updates tracked since enumeration
NPPES CertifiedApril 23, 2026
✔ NPI 1235372301 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in IL · 036.134795
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Also ListedPathology · DermatopathologyTaxonomy 207ZD0900X · License 036.134795 (IL)
3815 HIGHLAND AVE, Downers Grove, IL 60515
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Secondary Practice Location 1

Location 15201 Willow Springs Rd Ste 430LA Grange Highlands, IL 60525-6538 · Phone (708) 482-3213

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Karl Michael Napekoski M.d. 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 ID6406070424
PECOS Enrollment IDI20140613001140
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.

Areas of Expertise CMS Part B claims 15

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
8,363 services4,542 patients
Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
772 services487 patients
Pathology examination of tissue using a microscope, moderately low complexity 88304
A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.
184 services172 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
143 services46 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
139 services136 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
93 services37 patients

Hospital Affiliations CMS Care Compare 5

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

Advocate Sherman Hospital

Acute Care Hospitals · Elgin, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140030
Location1425 North Randall RoadElgin, IL 60123 · Kane County
Emergency services Birthing friendly

Advocate Trinity Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140048
Location2320 E 93rd StChicago, IL 60617 · Cook County
Emergency services Birthing friendly

Advocate Christ Hospital & Medical Center

Acute Care Hospitals · Oak Lawn, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140208
Location4440 W 95th StreetOak Lawn, IL 60453 · Cook County
Emergency services Birthing friendly

Advocate Lutheran General Hospital

Acute Care Hospitals · Park Ridge, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140223
Location1775 Dempster StPark Ridge, IL 60068 · Cook County
Emergency services Birthing friendly

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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
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
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
DR. HEMANT PANCHAL M.D.
Pain Medicine (Interventional Pain Medicine)
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 Karl Napekoski's NPI number?

The NPI number for Karl Napekoski is 1235372301. It was assigned to this individual provider in the NPPES registry on April 19, 2009.

Where is Karl Napekoski located?

Karl Napekoski practices at 3815 Highland Ave, Downers Grove, IL 60515. The listed phone number is (630) 275-1027.

What is Karl Napekoski's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Karl Napekoski enrolled in Medicare?

Yes. Karl Napekoski 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.

What insurance does Karl Napekoski accept?

Health plans from Oscar Insurance Company list Karl Napekoski 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 Karl Napekoski affiliated with any hospitals?

According to CMS data, Karl Napekoski is affiliated with Advocate Sherman Hospital, Advocate Trinity Hospital, Advocate Christ Hospital & Medical Center, Advocate Lutheran General Hospital and Advocate Good Samaritan Hospital.

When was this NPI record last updated?

The NPPES record for Karl Napekoski was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.