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AUGUST DIDION SIGELKO MD
NPI 1053815225
Internal Medicine - Critical Care Medicine in Aurora, IL

Active since March 21, 2018PECOS EnrolledAccepts Medicare Assignment
2040 OGDEN AVE STE 401, AURORA, IL 60504(630) 499-7500(630) 898-3970 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 2, 2021, Mar 21, 2018 (2 updates tracked since 2018).

About August Didion Sigelko Md NPPES

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

AUGUST DIDION SIGELKO MD (NPI 1053815225) is an individual critical care medicine provider in Aurora, Illinois, licensed in Illinois (036160895) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Copley Memorial Hospital, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1053815225
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameAUGUST DIDION SIGELKOCredential: MD
Location Address2040 OGDEN AVE STE 401Aurora, IL 60504-7208
Mailing Address2000 Ogden Ave Ste P050Aurora, IL 60504-7222 · (630) 499-2404 · Fax (630) 499-4750
Phone(630) 499-7500
Fax(630) 898-3970
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateMarch 21, 2018
Last NPPES UpdateJuly 1, 20262 updates tracked since enumeration
NPPES CertifiedJuly 1, 2026
✔ NPI 1053815225 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 · 036160895
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 ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 036160895 (IL)
2040 OGDEN AVE STE 401, Aurora, IL 60504
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.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

August Didion Sigelko Md 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 ID6406106889
PECOS Enrollment IDI20260605000516
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 August Sigelko 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 Center
15 mi
Internal Medicine
2011 YORK ROAD, 2ND FLOOR
Oak Brook, IL 60523
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Rush University Medical Group
  • 2,169 clinicians in this Medicare group
NPI 1801375696 (630) 724-1310
Rush Medical Group
28 mi
Internal Medicine
1620 W HARRISON ST
Chicago, IL 60612
  • Reassigned Medicare billing, Illinois enrollment
  • 548 clinicians in this Medicare group
NPI 1467312850 (312) 942-5000

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

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

Copley Memorial Hospital

Acute Care Hospitals · Aurora, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140029
Location2000 Ogden AvenueAurora, IL 60504 · Kane County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60504 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
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.

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.

MRS. SONAL MUKESH PATEL APRN DNP
Nurse Practitioner (Gerontology)
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 978-4889
TOMMY PACANA M.D.
Internal Medicine (Gastroenterology)
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 499-6688
MRS. DEBRA JUNE QUINN M. S.
Audiologist
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 466-3470
DR. JONATHAN HWAIEN HUANG M.D.
Urology
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 692-5700
DR. AKHTAR K SIDDIQUI M.D.
Internal Medicine (Pulmonary Disease)
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 499-7500
CATHLEEN KOVANIC AU.D., CCC-A
Audiologist
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 978-6895
DR. SUNEETHA VYSETTI MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 978-4889
STEPHANIE KALANT D.O
Internal Medicine (Gastroenterology)
2040 OGDEN AVE STE 401
AURORA, IL 60504
Dupage County (630) 499-6688

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 August Sigelko's NPI number?

The NPI number for August Sigelko is 1053815225. It was assigned to this individual provider in the NPPES registry on March 21, 2018.

Where is August Sigelko located?

August Sigelko practices at 2040 Ogden Ave Ste 401, Aurora, IL 60504. The listed phone number is (630) 499-7500.

What is August Sigelko's specialty?

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

Is August Sigelko enrolled in Medicare?

Yes. August Sigelko 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 August Sigelko's services?

According to the CMS Revalidation Reassignment List (October 2026 release), August Sigelko reassigns Medicare benefits to 2 organizations: Rush University Medical Center (Oak Brook, IL) and Rush Medical Group (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 August Sigelko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does August Sigelko accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list August Sigelko 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 August Sigelko affiliated with any hospitals?

According to CMS data, August Sigelko is affiliated with Copley Memorial Hospital.

When was this NPI record last updated?

The NPPES record for August Sigelko was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.