STEVEN CAMPBELL MAREK M.D.
NPI 1588953897
Hospitalist in Oak Lawn, IL

Q: What is Steven Marek's NPI number?

The NPI number for Steven Marek is 1588953897. It was assigned to this individual provider in the NPPES registry on April 7, 2011.

Q: What is Steven Marek's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Steven Marek was last updated on January 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since April 07, 2011PECOS Enrolled

4440 W 95TH ST STE 2177H, OAK LAWN, IL 60453(847) 723-5577(708) 684-4716 Get Directions Write a Review

NPPES record last updated: January 22, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 22, 2026, Jun 7, 2022 (2 updates tracked since 2022).

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About Steven Campbell Marek M.d. NPPES

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

STEVEN CAMPBELL MAREK M.D. (NPI 1588953897) is an individual hospitalist provider in Oak Lawn, Illinois, licensed in Illinois (036-143896) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and maintains a secondary practice location in Washington.

NPPES Registry Identity

NPI1588953897

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameSTEVEN CAMPBELL MAREKCredential: M.D.

Location Address4440 W 95TH ST STE 2177HOak Lawn, IL 60453-2600

Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900

Phone(847) 723-5577

Fax(708) 684-4716

Sole ProprietorNo

Enumeration DateApril 7, 2011

Last NPPES UpdateJanuary 22, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 22, 2026

✔ NPI 1588953897 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in IL · 036-143896

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedPediatricsTaxonomy 208000000X · License 0101256140 (VA), MD042379 (DC)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

4440 W 95TH ST STE 2177H, Oak Lawn, IL 60453

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Secondary Practice Location 1

Location 1111 Michigan Ave NW, Suite M-4800Washington, DC 20010-2916 · Phone (217) 390-4950

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Steven Campbell Marek M.d. 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 Reassignment

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

Advocate Health & Hospitals Corporation

Same address

Medical Specialty

4440 W 95TH ST
Oak Lawn, IL 60453

Reassigned Medicare billing, Illinois enrollment
Medicare enrollment name: Advocate Health And Hospitals Corporation
4,870 clinicians in this Medicare group

NPI 1912936014 (847) 390-5900

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 60453 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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 11

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

SEETAL MISHRA M.D.

Pediatrics