1. Home
  2. Directory
  3. Illinois
  4. Chicago
  5. Nurse Practitioner
  6. NPI Profile

NATHAN ZITKO APRN, NNP-BC
NPI 1144923343
Nurse Practitioner - Neonatal in Chicago, IL

Active since March 24, 2023PECOS Enrolled
1620 W HARRISON ST, CHICAGO, IL 60612(312) 942-5000 Get Directions Write a Review

NPPES record last updated: April 7, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 7, 2026, Mar 24, 2023 (2 updates tracked since 2023).

About Nathan Zitko Aprn, Nnp-bc NPPES

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

NATHAN ZITKO APRN, NNP-BC (NPI 1144923343) is an individual neonatal provider in Chicago, Illinois, licensed in Illinois (209026988) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1144923343
Entity TypeIndividualMale
Primary Taxonomy363LN0000X
Provider Legal NameNATHAN ZITKOCredential: APRN, NNP-BC
Location Address1620 W HARRISON STChicago, IL 60612-3801
Mailing Address104 S Laflin St Apt 102Chicago, IL 60607-2482 · (630) 338-7631
Phone(312) 942-5000
Sole ProprietorNo
Enumeration DateMarch 24, 2023
Last NPPES UpdateApril 7, 20262 updates tracked since enumeration
NPPES CertifiedApril 7, 2026
✔ NPI 1144923343 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · NeonatalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LN0000X
License✔ Licensed in IL · 209026988
1620 W HARRISON ST, Chicago, IL 60612
Open in Google Maps ↗

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)

Nathan Zitko Aprn, Nnp-bc 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 Nathan Zitko reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Rush University Medical Group
Same address
Internal Medicine
1620 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • 2,169 clinicians in this Medicare group
NPI 1093819542 (312) 942-5000
Adventist Health Partners, Inc
6.5 mi
Family Medicine
6723 ROOSEVELT RD
Berwyn, IL 60402
  • Reassigned Medicare billing, Illinois enrollment
  • 381 clinicians in this Medicare group
NPI 1659624849 (708) 383-6346

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 60612 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
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.

NICHOLAS RIGLER
Internal Medicine
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
KABEER RAJAN MASIH MD
Radiology (Vascular & Interventional Radiology)
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
MARGARET C SCHERMERHORN MD
Obstetrics & Gynecology
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
ANDREW MAX MELCHIORIS MD, MBA
Internal Medicine
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (314) 942-5000
NICOLE HALEY SULIMA DNP
Nurse Practitioner (Gerontology)
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
KRINA PATEL MD
Psychiatry & Neurology (Psychiatry)
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
LAYNE MITCHELL BESSA
Registered Nurse
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
COLETTE MITCHELL OT
Occupational Therapist
1620 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5800

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 Nathan Zitko's NPI number?

The NPI number for Nathan Zitko is 1144923343. It was assigned to this individual provider in the NPPES registry on March 24, 2023.

Where is Nathan Zitko located?

Nathan Zitko practices at 1620 W Harrison St, Chicago, IL 60612. The listed phone number is (312) 942-5000.

What is Nathan Zitko's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, with taxonomy code 363LN0000X.

Is Nathan Zitko enrolled in Medicare?

Yes. Nathan Zitko is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nathan Zitko's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Zitko reassigns Medicare benefits to 2 organizations: Rush University Medical Group (Chicago, IL) and Adventist Health Partners, Inc (Berwyn, 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 Nathan Zitko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nathan Zitko accept?

Health plans from Oscar Health list Nathan Zitko 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 Nathan Zitko was last updated on April 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.