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DAVID J. MIKOLAJCZAK D.O.
NPI 1255368395
Emergency Medicine in New Lenox, IL

Active since June 26, 2006PECOS Enrolled
1900 SILVER CROSS BLVD, SILVER CROSS HOSPITAL, NEW LENOX, IL 60451(815) 740-1100 Get Directions Write a Review

NPPES record last updated: September 8, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About David J. Mikolajczak D.o. NPPES

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

DAVID J. MIKOLAJCZAK D.O. (NPI 1255368395) is an individual emergency medicine provider in New Lenox, Illinois, licensed in Illinois (036-073719) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1255368395
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDAVID J. MIKOLAJCZAKCredential: D.O.
Location Address1900 SILVER CROSS BLVD, SILVER CROSS HOSPITALNew Lenox, IL 60451-9509
Mailing Address18021 South Hunt Club DriveMokena, IL 60448
Phone(815) 740-1100
Sole ProprietorNo
Enumeration DateJune 26, 2006
Last NPPES UpdateSeptember 8, 2016
✔ NPI 1255368395 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in IL · 036-073719
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.
1900 SILVER CROSS BLVD, New Lenox, IL 60451
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Other Identifiers 3

Medicare UPINC40474IL
MedicaidO36073719IL
Medicare PINK38275IL

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 (PECOS)

David J. Mikolajczak D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

2

Medicare enrollment records show David Mikolajczak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Health Service Systems, Inc
0.1 mi
Internal Medicine
1851 SILVER CROSS BOULEVARD, SUITE 110
New Lenox, IL 60451
  • Reassigned Medicare billing, Illinois enrollment
  • 133 clinicians in this Medicare group
NPI 1851323257 (815) 300-3060
Em Strategies,ltd.
0.2 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60451 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.

MRS. CONNIE LYNN MACHETTA RDN, LDN
Dietitian, Registered
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 474-0458
ADVANCED MIDWEST RADIOLOGY S C
Radiology (Diagnostic Radiology)
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 717-8478
SILVER CROSS MSO LLC
Clinic/Center (Multi-Specialty)
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-7106
IMRAN AKHTAR D.O
Internal Medicine
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-1100
MRS. SARA MILANO FNP-BC
Nurse Practitioner
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-7097
MS. CAMMIE C LIU MMS, PA-C
Physician Assistant
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-1032
MOHAMMAD MUSTAFA ALSHEIKH
Nurse Anesthetist, Certified Registered
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-1100
SILVER CROSS HEALTH CONNECTION, LLC
Health Maintenance Organization
1900 SILVER CROSS BLVD
NEW LENOX, IL 60451
Will County (815) 300-1100

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 David Mikolajczak's NPI number?

The NPI number for David Mikolajczak is 1255368395. It was assigned to this individual provider in the NPPES registry on June 26, 2006.

Where is David Mikolajczak located?

David Mikolajczak practices at 1900 Silver Cross Blvd Silver Cross Hospital, New Lenox, IL 60451. The listed phone number is (815) 740-1100.

What is David Mikolajczak's specialty?

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

Is David Mikolajczak enrolled in Medicare?

Yes. David Mikolajczak is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for David Mikolajczak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Mikolajczak reassigns Medicare benefits to 2 organizations: Health Service Systems, Inc (New Lenox, 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 David Mikolajczak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Mikolajczak accept?

Health plans from Oscar Health list David Mikolajczak 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.

When was this NPI record last updated?

The NPPES record for David Mikolajczak was last updated on September 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.