QUEST DIAGNOSTICS LLC
NPI 1093917544
Clinical Medical Laboratory in Danbury, CT
About Quest Diagnostics Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
QUEST DIAGNOSTICS LLC (NPI 1093917544) is a healthcare organization registered as a clinical medical laboratory in Danbury, Connecticut and active in the NPI registry since June 2007. The organization holds a CLIA Certificate of Compliance certificate valid through March 10, 2027 and lists Leah D Timmerman, Sr. Vp, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and revalidation status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Quest Diagnostics Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
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 Compliance 07D0696809
Quest Diagnostics · Danbury, CTOther Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 1093917544. It was assigned to this organization in the NPPES registry on June 5, 2007.
Where is Quest Diagnostics LLC located?
Quest Diagnostics LLC is located at 7 Germantown Rd, Danbury, CT 06810. The listed phone number is (877) 868-2191.
What is Quest Diagnostics LLC's specialty?
The primary specialty registered for this NPI is Clinical Medical Laboratory with taxonomy code 291U00000X.
Is Quest Diagnostics LLC enrolled in Medicare?
Yes. Quest Diagnostics LLC is registered in the Medicare PECOS enrollment system.
When is Quest Diagnostics LLC's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Connecticut, Independent Clinical Laboratory) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
Does Quest Diagnostics LLC hold a CLIA laboratory certificate?
Yes. A Certificate of Compliance (number 07D0696809) is associated with this NPI, valid through March 10, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Quest Diagnostics LLC accept?
Health plans from CHRISTUS Health Plan, Oscar Health Insurance, Oscar Health Maintenance Organization of Florida, Oscar Health Plan, Inc. and Oscar Insurance Company and 1 other insurer list Quest Diagnostics LLC 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.
When was this NPI record last updated?
The NPPES record for Quest Diagnostics LLC was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 days 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.