QUEST DIAGNOSTICS LLC
NPI 1609460765
Clinical Medical Laboratory in Chicago, IL

Active since March 01, 2021CLIA 14D2211007 · Waiver
1431 N WESTERN AVE STE 406, CHICAGO, IL 60622(312) 491-5250(312) 491-5020 Get Directions Write a Review

NPPES record last updated: December 2, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 2, 2024, Mar 1, 2021 (2 updates tracked since 2021).

About Quest Diagnostics Llc NPPES

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

QUEST DIAGNOSTICS LLC (NPI 1609460765) is a healthcare organization registered as a clinical medical laboratory in Chicago, Illinois and active in the NPI registry since March 2021. The organization holds a CLIA Waiver certificate valid through January 24, 2027 and lists Leah D Timmerman, Vice President, as its authorized official.

NPPES Registry Identity

NPI1609460765
Entity TypeOrganization
Primary Taxonomy291U00000X
Legal Business NameQUEST DIAGNOSTICS LLC
Location Address1431 N WESTERN AVE STE 406Chicago, IL 60622-1774
Mailing Address14275 Midway Rd Ste 400Addison, TX 75001-3614 · (214) 932-8018 · Fax (610) 271-4245
Fax(312) 491-5020
Organization SubpartYesParent: Quest Diagnostics Incorporated
Authorized OfficialLeah D TimmermanVice President · (973) 520-2700
Enumeration DateMarch 1, 2021
Last NPPES UpdateDecember 2, 20242 updates tracked since enumeration
NPPES CertifiedDecember 2, 2024
NPI 1609460765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyClinical Medical LaboratoryLaboratories
Taxonomy Code291U00000X
Definition
(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.
1431 N WESTERN AVE STE 406, Chicago, IL 60622

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 14D2211007

Quest Diagnostics - West Town Health Center · Chicago, IL
Active · expires Jan 24, 2027
CLIA Number14D2211007
Laboratory TypeIndependent
Certificate Effective DateJanuary 25, 2025
Certificate Expiration DateJanuary 24, 2027
Laboratory DirectorMatthew Kraiza
Laboratory Phone(312) 491-5250
Laboratory LocationQuest Diagnostics - West Town Health Center1431 N Western Ave - Ste 406, Chicago, IL 60622
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims

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.

Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
42 services28 patients

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.

Family Medicine
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Student in an Organized Health Care Education/Training Program
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Family Medicine
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Student in an Organized Health Care Education/Training Program
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Student in an Organized Health Care Education/Training Program
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Family Medicine
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Social Worker (Clinical)
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622
Student in an Organized Health Care Education/Training Program
1431 N WESTERN AVE STE 406
CHICAGO, IL 60622

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 Quest Diagnostics LLC's NPI number?

The NPI number for Quest Diagnostics LLC is 1609460765. It was assigned to this organization in the NPPES registry on March 1, 2021.

Where is Quest Diagnostics LLC located?

Quest Diagnostics LLC is located at 1431 N Western Ave Ste 406, Chicago, IL 60622. The listed phone number is (312) 491-5250.

What is Quest Diagnostics LLC's specialty?

The primary specialty registered for this NPI is Clinical Medical Laboratory with taxonomy code 291U00000X.

Does Quest Diagnostics LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 14D2211007) is associated with this NPI, valid through January 24, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Quest Diagnostics LLC was last updated on December 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.