Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GARY A STEINECKER MD
NPI 1699880872
Internal Medicine - Medical Oncology in Oak Lawn, IL

Q: What is Gary Steinecker's NPI number?

The NPI number for Gary Steinecker is 1699880872. It was assigned to this individual provider in the NPPES registry on August 20, 2006.

Q: What is Gary Steinecker's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Q: When was this NPI record last updated?

The NPPES record for Gary Steinecker was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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 August 20, 2006PECOS Enrolled

4400 W 95TH ST, #302, OAK LAWN, IL 60453(708) 346-4100(708) 346-2095 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Gary A Steinecker Md NPPES

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

GARY A STEINECKER MD (NPI 1699880872) is an individual medical oncology provider in Oak Lawn, Illinois, licensed in Illinois (03645587) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1699880872

Entity TypeIndividualMale

Primary Taxonomy207RX0202X

Provider Legal NameGARY A STEINECKERCredential: MD

Location Address4400 W 95TH ST, #302Oak Lawn, IL 60453

Mailing Address4400 W 95th St, #302Oak Lawn, IL 60453 · (708) 346-4100 · Fax (708) 346-2095

Phone(708) 346-4100

Fax(708) 346-2095

Sole ProprietorNo

Enumeration DateAugust 20, 2006

Last NPPES UpdateSeptember 29, 2026

✔ NPI 1699880872 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RX0202X

License✔ Licensed in IL · 03645587

Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

4400 W 95TH ST, Oak Lawn, IL 60453

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Other Identifiers 2

Other110166600IL · Railroad Medicare

Medicaid036045587IL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gary A Steinecker Md 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

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

Affiliated Oncologists, LLC

Same address

Medical Oncology

4400 W 95TH ST, SUITE 311
Oak Lawn, IL 60453

Reassigned Medicare billing, Illinois enrollment
57 clinicians in this Medicare group

NPI 1225314362 (310) 335-4000

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

$183.39 typical visit price

range $60.08 – $183.39

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

Most-billed visit code 99205

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 20

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

RONALD MYINT M.D.

Internal Medicine

4400 W 95TH ST, SUITE 311
OAK LAWN, IL 60453

Cook County (708) 424-9710

MS. JANINE ROSE ROSENBERG M.S., C.G.C.

Genetic Counselor, MS

4400 W 95TH ST, PHYSICIANS' PAVILLION SUITE 207
OAK LAWN, IL 60453

Cook County (708) 684-1564

MISS JACQUELINE ROSE ZDON PA-C

Physician Assistant (Surgical)

4400 W 95TH ST, SUITE 205
OAK LAWN, IL 60453

Cook County (708) 346-4040

JOHN LOUIS ANCONA PA

Physician Assistant

4400 W 95TH ST, SUITE 205
OAK LAWN, IL 60453

Cook County (630) 977-9764

MARK S. REITER, M.D., S.C.

Clinic/Center

4400 W 95TH ST, SUITE 405
OAK LAWN, IL 60453

Cook County (708) 499-2323

ARIHA SHAH

Psychologist

4400 W 95TH ST
OAK LAWN, IL 60453

Cook County (708) 684-5832

MRS. ANNE ZIELLNSKI SCHAIBLE MD

Obstetrics & Gynecology

4400 W 95TH ST, STE 403
OAK LAWN, IL 60453

Cook County (708) 422-3984

DR. JOEL ROY GUILLORY JR. M. D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

4400 W 95TH ST, STE 205
OAK LAWN, IL 60453

Cook County (708) 346-4040

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 Gary Steinecker's NPI number?

The NPI number for Gary Steinecker is 1699880872. It was assigned to this individual provider in the NPPES registry on August 20, 2006.

Where is Gary Steinecker located?

Gary Steinecker practices at 4400 W 95th St #302, Oak Lawn, IL 60453. The listed phone number is (708) 346-4100.

What is Gary Steinecker's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Gary Steinecker enrolled in Medicare?

Yes. Gary Steinecker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gary Steinecker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Steinecker reassigns Medicare benefits to 2 organizations: Affiliated Oncologists, LLC (Oak Lawn, IL) and Advocate Health & Hospitals Corporation (Oak Lawn, 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 Gary Steinecker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gary Steinecker was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.