Active NPI
Apex Diagnostics Inc.
- Radiology Clinic/Center
- Darien, IL
National Provider Identifier
1154949329
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Radiology Clinic/Center
- Legal business name
- APEX DIAGNOSTICS INC.
- Practice address
- 8205 Cass Ave Ste 108C
Darien, IL 60561-5319 - Phone
- (877) 589-1424
- NPI assigned
- Jul 14, 2020
- Last updated
- Jul 6, 2026
- Organization subpart
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Mr. Christopher Chalokwu
- Title
- Director
- Phone
- (877) 589-1424
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Radiology Clinic/Center | 261QR0200X | Primary |
Addresses
Primary practice location
8205 Cass Ave Ste 108C
Darien, IL 60561-5319
Mailing address
8205 Cass Ave Ste 108C
Darien, IL 60561-5319
Phone (877) 589-1424
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| O20201006000849 | IL | Part B Supplier - Independent Diagnostic Testing Facility (Idtf) | 9830518174 | Practice locations: Darien, IL |
National Provider Directory
National Provider DirectoryLocations
6201 W Howard St
Ste 211A
Niles, IL 60714
Phone (708) 428-2996
Practitioners & affiliated clinicians
Practitioners 4
Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.
-
- Diagnostic Radiology Physician
- Chicago, IL
- NPI 1821090622
-
- Cardiovascular Disease Physician
- Chicago, IL
- NPI 1316946700
-
- Cardiovascular Disease Physician
- La Grange, IL
- NPI 1861501728
-
- Diagnostic Radiology Physician
- Bethpage, NY
- NPI 1922070457
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1594684800000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1783296000000",
"number": "1154949329",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "8205 CASS AVE STE 108C",
"city": "DARIEN",
"state": "IL",
"postal_code": "605615319",
"telephone_number": "877-589-1424"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "8205 CASS AVE STE 108C",
"city": "DARIEN",
"state": "IL",
"postal_code": "605615319",
"telephone_number": "877-589-1424"
}
],
"practiceLocations": [],
"basic": {
"organization_name": "APEX DIAGNOSTICS INC.",
"organizational_subpart": "NO",
"enumeration_date": "2020-07-14",
"last_updated": "2026-07-06",
"certification_date": "2026-07-06",
"status": "A",
"authorized_official_last_name": "CHALOKWU",
"authorized_official_first_name": "CHRISTOPHER",
"authorized_official_title_or_position": "DIRECTOR",
"authorized_official_telephone_number": "877-589-1424",
"authorized_official_name_prefix": "Mr."
},
"taxonomies": [
{
"code": "261QR0200X",
"taxonomy_group": "",
"desc": "Clinic/Center, Radiology",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Darien, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.