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MARK J. SOKOLOWSKI MD
NPI 1346278017
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in Chicago, IL

Active since June 29, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 14D2053678 · Waiver
1743 N HARLEM AVE, CHICAGO, IL 60707(708) 529-4500 Get Directions Write a Review

NPPES record last updated: February 23, 2017. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 23, 2017, Sep 2, 2016 (2 updates tracked since 2016).

About Mark J. Sokolowski Md NPPES

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

MARK J. SOKOLOWSKI MD (NPI 1346278017) is an individual orthopaedic surgery of the spine provider in Chicago, Illinois, licensed in Illinois (036111925) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through February 4, 2027, and is affiliated with Northwest Community Hospital 1.

NPPES Registry Identity

NPI1346278017
Entity TypeIndividualMale
Primary Taxonomy207XS0117X
Provider Legal NameMARK J. SOKOLOWSKICredential: MD
Location Address1743 N HARLEM AVEChicago, IL 60707-4305
Mailing AddressPo Box 4571Lisle, IL 60532-9571 · (708) 529-4500
Phone(708) 529-4500
Sole ProprietorYes
Medical School CMSRush Medical College Of Rush UniversityGraduated 2001
Enumeration DateJune 29, 2006
Last NPPES UpdateFebruary 23, 20172 updates tracked since enumeration
✔ NPI 1346278017 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Orthopaedic Surgery of the SpineAllopathic & Osteopathic Physicians
Taxonomy Code207XS0117X
License✔ Licensed in IL · 036111925
Definition
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic surgeons of the spine deal with the evaluation and nonoperative and operative treatment of the full spectrum of primary spinal disorders including trauma, degenerative, deformity, tumor, and reconstructive.
1743 N HARLEM AVE, Chicago, IL 60707
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Other Identifiers 2

Medicare UPINI56106
Medicare PINK39858

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

Mark J. Sokolowski Md 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 ID4789697251
PECOS Enrollment IDI20070806000249
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 14D2053678

Mark Sokolowski M D · Chicago, IL
Active · expires Feb 4, 2027
CLIA Number14D2053678
Laboratory TypePhysician Office
Certificate Effective DateFebruary 5, 2025
Certificate Expiration DateFebruary 4, 2027
Laboratory DirectorMark J. Sokolowski
Laboratory Phone(708) 529-4500
Laboratory LocationMark Sokolowski M D1743 N Harlem Ave, Chicago, IL 60707
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 3

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 moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
46 services37 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
16 services16 patients
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.
16 services13 patients

Hospital Affiliations CMS Care Compare

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

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140252
Location800 W Central RoadArlington Heights, IL 60005 · Cook County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES

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

MARK J SOKOLOWSKI MD SC
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
1743 N HARLEM AVE
CHICAGO, IL 60707
Cook County (773) 295-5025

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 Mark Sokolowski's NPI number?

The NPI number for Mark Sokolowski is 1346278017. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is Mark Sokolowski located?

Mark Sokolowski practices at 1743 N Harlem Ave, Chicago, IL 60707. The listed phone number is (708) 529-4500.

What is Mark Sokolowski's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Is Mark Sokolowski enrolled in Medicare?

Yes. Mark Sokolowski 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.

Does Mark Sokolowski hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 14D2053678) is associated with this NPI, valid through February 4, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

Is Mark Sokolowski affiliated with any hospitals?

According to CMS data, Mark Sokolowski is affiliated with Northwest Community Hospital 1.

When was this NPI record last updated?

The NPPES record for Mark Sokolowski was last updated on February 23, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.