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GRACE Y SUN MD
NPI 1033796479
Radiology - Radiation Oncology in Orland Park, IL

Active since March 24, 2021PECOS Enrolled
15300 WEST AVE # LL, ORLAND PARK, IL 60462(708) 448-9393(708) 448-7530 Get Directions Write a Review

NPPES record last updated: August 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 13, 2026, Jul 11, 2022, Mar 24, 2021 (3 updates tracked since 2021).

About Grace Y Sun Md NPPES

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

GRACE Y SUN MD (NPI 1033796479) is an individual radiation oncology provider in Orland Park, Illinois, licensed in Illinois (036181224) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS and maintains a secondary practice location in Ann Arbor.

NPPES Registry Identity

NPI1033796479
Entity TypeIndividualFemale
Primary Taxonomy2085R0001X
Provider Legal NameGRACE Y SUNCredential: MD
Location Address15300 WEST AVE # LLOrland Park, IL 60462-4600
Mailing Address15300 West AveOrland Park, IL 60462-4600 · (708) 448-9393
Phone(708) 448-9393
Fax(708) 448-7530
Sole ProprietorNo
Enumeration DateMarch 24, 2021
Last NPPES UpdateAugust 13, 20263 updates tracked since enumeration
NPPES CertifiedAugust 13, 2026
✔ NPI 1033796479 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
License✔ Licensed in IL · 036181224
Definition
A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
15300 WEST AVE # LL, Orland Park, IL 60462
Open in Google Maps ↗

Secondary Practice Location 1

Location 11500 E Medical Center DrAnn Arbor, MI 48109-5000 · Phone (734) 936-4300

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grace Y Sun 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 Reassignment

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

Northwestern Medical Faculty Foundation
36 mi
Multi-Specialty
DEPT 5777
Carol Stream, IL 60122
  • Reassigned Medicare billing, Illinois enrollment
  • 4,817 clinicians in this Medicare group
NPI 1346235314 (855) 694-2866

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 60462 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
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
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 2

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

MS. KRISTINA NANCY HAJEK PA-C
Physician Assistant
15300 WEST AVE # LL
ORLAND PARK, IL 60462
Cook County (708) 923-5173
MS. HELEN SKRZECZ APRN, CNP
Nurse Practitioner (Family)
15300 WEST AVE # LL
ORLAND PARK, IL 60462
Cook County (708) 923-5550

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 Grace Sun's NPI number?

The NPI number for Grace Sun is 1033796479. It was assigned to this individual provider in the NPPES registry on March 24, 2021.

Where is Grace Sun located?

Grace Sun practices at 15300 West Ave # Ll, Orland Park, IL 60462. The listed phone number is (708) 448-9393.

What is Grace Sun's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Grace Sun enrolled in Medicare?

Yes. Grace Sun is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Grace Sun's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grace Sun reassigns Medicare benefits to Northwestern Medical Faculty Foundation (Carol Stream, IL). The 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 Grace Sun'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 Grace Sun was last updated on August 13, 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.