Active NPI
Quest Diagnostics LLC Il
- Clinical Medical Laboratory
- Schaumburg, IL
National Provider Identifier
1346389764
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Medical Laboratory
- License
- 14D0416537
- Legal business name
- QUEST DIAGNOSTICS LLC IL
- Practice address
- 506 E State Pkwy
Schaumburg, IL 60173-4538 - Phone
- (708) 885-2010
- NPI assigned
- Feb 5, 2007
- Organization subpart
- Yes
- Parent organization
- QUEST DIAGNOSTICS INCORPORATED
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Leah D Timmerman
- Title
- Vice President
- Phone
- (973) 520-2700
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Clinical Medical Laboratory | 291U00000X | 14D0416537 | IL | Primary |
Addresses
Primary practice location
506 E State Pkwy
Schaumburg, IL 60173-4538
Mailing address
4770 Regent Blvd
Irving, TX 75063-2445
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| O20040526000665 | IL | Part B Supplier - Independent Clinical Laboratory | 3779474986 |
12 other NPIs on this enrollment Practice locations: East Moline, IL; Wood Dale, IL; Schaumburg, IL; Rock Island, IL; Moline, IL; Chicago, IL |
Other NPIs with the same Medicare PAC ID 4
NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).
-
- Anatomic Pathology & Clinical Pathology Physician
- Beaver Dam, WI
- NPI 1851901466
3779474986
Other NPIs on the same Medicare enrollment 11
NPIs listed together on one Medicare enrollment, typically parts of the same organization.
Laboratory certificates & supplier records
Derived by NPIMapThese CMS records do not include an NPI. They are shown because their name and street address match this provider’s.
CLIA laboratory certificates
| CLIA number | Laboratory | Certificate | Expires |
|---|---|---|---|
| 14D0416537 | Quest Diagnostics LLC (Il) | Accreditation | Feb 8, 2027 |
National Provider Directory
National Provider Directory- Part of
- Questdiagnost Ic Inc
Locations
506 E State Pkwy
Ste A
Schaumburg, IL 60173
Phone (414) 732-2577
Ownership & related parties
Parent organization (reported in NPPES) 1
This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.
-
- Clinical Medical Laboratory
- Moline, IL
- NPI 1558389510
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1170633600000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1783641600000",
"number": "1346389764",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4770 REGENT BLVD",
"city": "IRVING",
"state": "TX",
"postal_code": "750632445"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "506 E STATE PKWY",
"city": "SCHAUMBURG",
"state": "IL",
"postal_code": "601734538",
"telephone_number": "708-885-2010"
}
],
"practiceLocations": [],
"basic": {
"organization_name": "QUEST DIAGNOSTICS LLC IL",
"organizational_subpart": "YES",
"parent_organization_legal_business_name": "QUEST DIAGNOSTICS INCORPORATED",
"enumeration_date": "2007-02-05",
"last_updated": "2026-07-10",
"certification_date": "2026-07-10",
"status": "A",
"authorized_official_last_name": "TIMMERMAN",
"authorized_official_first_name": "LEAH",
"authorized_official_middle_name": "D",
"authorized_official_title_or_position": "VICE PRESIDENT",
"authorized_official_telephone_number": "973-520-2700"
},
"taxonomies": [
{
"code": "291U00000X",
"taxonomy_group": "",
"desc": "Clinical Medical Laboratory",
"state": "IL",
"license": "14D0416537",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Schaumburg, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 10, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.