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AARON ZIRK D.O.
NPI 1386917268
Emergency Medicine in Naperville, IL

Active since February 22, 2012PECOS EnrolledAccepts Medicare Assignment
94.1/100
CMS Quality Rating
1041 ROYAL SAINT GEORGE DR, NAPERVILLE, IL 60563(773) 791-2478 Get Directions Write a Review

NPPES record last updated: July 19, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 19, 2024, Jan 9, 2019, Nov 24, 2015 (3 updates tracked since 2015).

About Aaron Zirk D.o. NPPES

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

AARON ZIRK D.O. (NPI 1386917268) is an individual emergency medicine provider in Naperville, Illinois, licensed in Illinois (036.136027) and active in the NPI registry since February 2012. He is enrolled in Medicare PECOS, is affiliated with Sarah Bush Lincoln Health Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1386917268
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameAARON ZIRKCredential: D.O.
Location Address1041 ROYAL SAINT GEORGE DRNaperville, IL 60563-2322
Mailing Address1041 Royal Saint George DrNaperville, IL 60563-2322 · (773) 791-2478
Phone(773) 791-2478
Sole ProprietorYes
Medical School CMSOtherGraduated 2012
Enumeration DateFebruary 22, 2012
Last NPPES UpdateJuly 19, 20243 updates tracked since enumeration
NPPES CertifiedJuly 19, 2024
✔ NPI 1386917268 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in IL · 036.136027
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1041 ROYAL SAINT GEORGE DR, Naperville, IL 60563
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Secondary Practice Locations 2

Location 11041 Royal Saint George DrNaperville, IL 60563-2322 · Phone (773) 791-2478
Location 21000 Health Center DrMattoon, IL 61938-9261 · Phone (217) 258-2551 · Fax (217) 258-2256

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

Aaron Zirk D.o. 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 ID9436475290
PECOS Enrollment IDI20150313001459
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

6

Medicare enrollment records show Aaron Zirk reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advanced Wellness Medical, LLC
5.2 mi
General Practice
6325 MAIN STREET, SUITE 120
Woodridge, IL 60517
  • Reassigned Medicare billing, Illinois enrollment
  • 6 clinicians in this Medicare group
NPI 1831597194 (630) 541-6773
Cep America - Illinois, LLP
8.2 mi
Emergency Medicine
1325 N HIGHLAND AVE
Aurora, IL 60506
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Cepamerica Illinois LLP
  • 982 clinicians in this Medicare group
NPI 1164975371 (630) 859-2222
Illinois Emergency Medicine Specialists, LLC
8.6 mi
Emergency Medical Services
500 REMINGTON BLVD
Bolingbrook, IL 60440
  • Reassigned Medicare billing, Illinois enrollment
  • 187 clinicians in this Medicare group
NPI 1003150962 (630) 312-5000
Northwestern Medical Faculty Foundation
18 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
Community First Healthcare Of Illinois, Inc.
23 mi
Internal Medicine
5645 W ADDISON ST
Chicago, IL 60634
  • Reassigned Medicare billing, Illinois enrollment
  • 174 clinicians in this Medicare group
NPI 1962894675 (773) 794-8320
Sarah Bush Lincoln Health Center
159 mi
Family Medicine
1000 HEALTH CENTER DR
Mattoon, IL 61938
  • Reassigned Medicare billing, Illinois enrollment
  • 652 clinicians in this Medicare group
NPI 1568581379 (217) 258-2525

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
365 services353 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
289 services282 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
59 services58 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
16 services16 patients

Hospital Affiliations CMS Care Compare 3

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

Sarah Bush Lincoln Health Center

Acute Care Hospitals · Mattoon, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140189
Location1000 Health Center Drive P O Box 372Mattoon, IL 61938 · Coles County
Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140242
Location25 North Winfield RoadWinfield, IL 60190 · Du Page County
Emergency services Birthing friendly

Northwestern Medicine Kishwaukee Hospital

Acute Care Hospitals · Dekalb, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140286
LocationOne Kish Hospital DriveDekalb, IL 60115 · De Kalb County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60563 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.1/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality82.59
Promoting Interoperability100
Improvement Activities40

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 Aaron Zirk's NPI number?

The NPI number for Aaron Zirk is 1386917268. It was assigned to this individual provider in the NPPES registry on February 22, 2012.

Where is Aaron Zirk located?

Aaron Zirk practices at 1041 Royal Saint George Dr, Naperville, IL 60563. The listed phone number is (773) 791-2478.

What is Aaron Zirk's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Aaron Zirk enrolled in Medicare?

Yes. Aaron Zirk 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 Aaron Zirk's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Zirk reassigns Medicare benefits to 6 organizations: Advanced Wellness Medical, LLC (Woodridge, IL), Cep America - Illinois, LLP (Aurora, IL), Illinois Emergency Medicine Specialists, LLC (Bolingbrook, IL), Northwestern Medical Faculty Foundation (Carol Stream, IL), Community First Healthcare Of Illinois, Inc. (Chicago, IL) and 1 more organization, listed in the Medicare section above. 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 Aaron Zirk's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Aaron Zirk affiliated with any hospitals?

According to CMS data, Aaron Zirk is affiliated with Sarah Bush Lincoln Health Center, Northwestern Medicine Central Dupage Hospital and Northwestern Medicine Kishwaukee Hospital.

When was this NPI record last updated?

The NPPES record for Aaron Zirk was last updated on July 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.