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ADAM LAWRENCE ZACK
NPI 1568048015
Internal Medicine - Critical Care Medicine in Oak Lawn, IL

Active since March 23, 2021PECOS EnrolledAccepts Medicare Assignment
4440 W 95TH ST STE AIP, OAK LAWN, IL 60453(708) 283-5500 Get Directions Write a Review

NPPES record last updated: August 26, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 26, 2026, Mar 23, 2021 (2 updates tracked since 2021).

About Adam Lawrence Zack NPPES

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

ADAM LAWRENCE ZACK (NPI 1568048015) is an individual critical care medicine provider in Oak Lawn, Illinois, licensed in Illinois (036166835) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Mt Sinai Hospital Medical Center, and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1568048015
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameADAM LAWRENCE ZACK
Location Address4440 W 95TH ST STE AIPOak Lawn, IL 60453-2600
Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900 · Fax (847) 390-4757
Phone(708) 283-5500
Sole ProprietorNo
Medical School CMSMidwestern University, Chicago College Of Osteopathic MedGraduated 2021
Enumeration DateMarch 23, 2021
Last NPPES UpdateAugust 26, 20262 updates tracked since enumeration
NPPES CertifiedAugust 26, 2026
✔ NPI 1568048015 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License✔ Licensed in IL · 036166835
Definition
An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
Also ListedEmergency MedicineTaxonomy 207P00000X · License 036166835 (IL)
4440 W 95TH ST STE AIP, Oak Lawn, IL 60453
Open in Google Maps ↗

Secondary Practice Location 1

Location 17435 W Talcott AveChicago, IL 60631-3707 · Phone (773) 990-7921

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 and accepts Medicare assignment

Adam Lawrence Zack 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 ID3375992100
PECOS Enrollment IDI20231205003584
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

3

Medicare enrollment records show Adam Zack reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

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
Cepamerica Illinois LLP
4.0 mi
Emergency Medicine
2701 W 68TH ST
Chicago, IL 60629
  • Reassigned Medicare billing, Illinois enrollment
  • 982 clinicians in this Medicare group
NPI 1164944369 (773) 884-9000
Community First Healthcare Of Illinois, Inc.
16 mi
Diagnostic Radiology
5645 W ADDISON ST
Chicago, IL 60634
  • Reassigned Medicare billing, Illinois enrollment
  • 174 clinicians in this Medicare group
NPI 1053102269 (773) 282-7000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 4

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

Mt Sinai Hospital Medical Center

Acute Care Hospitals · Chicago, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140018
Location1500 S Fairfield AveChicago, IL 60608 · Cook County
Emergency services Birthing friendly

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

Holy Cross Hospital

Acute Care Hospitals · Chicago, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140133
Location2701 W 68th StreetChicago, IL 60629 · Cook County
Emergency services

Community First Medical Center

Acute Care Hospitals · Chicago, IL
1/5 CMS rating
OwnershipProprietary
CMS Certification Number140251
Location5645 W Addison StreetChicago, IL 60634 · Cook County
Emergency services

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 6

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

DR. DANIEL MARCOS GONZALEZ MD
Internal Medicine (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (800) 655-2656
DR. ARAVIND KUMAR BOMMIASAMY M.D.
Internal Medicine (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (708) 283-5500
DR. WILLIAM DANIEL YOUNG MD
Anesthesiology (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (219) 677-7866
OMAR A SIDDIQUI M.D.
Internal Medicine (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (708) 684-5094
LAUREN BECKER MD
Internal Medicine (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (708) 283-5500
NATASHA ROCHON
Nurse Practitioner (Critical Care Medicine)
4440 W 95TH ST STE AIP
OAK LAWN, IL 60453
Cook County (708) 283-5500

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 Adam Zack's NPI number?

The NPI number for Adam Zack is 1568048015. It was assigned to this individual provider in the NPPES registry on March 23, 2021.

Where is Adam Zack located?

Adam Zack practices at 4440 W 95th St Ste Aip, Oak Lawn, IL 60453. The listed phone number is (708) 283-5500.

What is Adam Zack's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Adam Zack enrolled in Medicare?

Yes. Adam Zack 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.

Which organizations bill Medicare for Adam Zack's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Adam Zack reassigns Medicare benefits to 3 organizations: Advocate Health & Hospitals Corporation (Oak Lawn, IL), Cepamerica Illinois LLP (Chicago, IL) and Community First Healthcare Of Illinois, Inc. (Chicago, 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 Adam Zack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Adam Zack accept?

Health plans from Oscar Health list Adam Zack 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 Adam Zack affiliated with any hospitals?

According to CMS data, Adam Zack is affiliated with Mt Sinai Hospital Medical Center, Advocate Sherman Hospital, Holy Cross Hospital and Community First Medical Center.

When was this NPI record last updated?

The NPPES record for Adam Zack was last updated on August 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.