Quest Diagnostics LLC

Quest Diagnostics LLC is a healthcare organization registered as Clinical Medical Laboratory in Newington, CT, holding Type 2 (organization) NPI 1831391473 since 2007. The authorized official on file is Charles Bowles, Vice President.

✓ Active NPI ✓ Valid NPI checksum Organization subpart

NPI	1831391473
Entity type	Organization (Type 2)
Legal business name	Quest Diagnostics LLC
Parent organization	Quest Diagnostics Incorporated
Practice address	955 MAIN ST, Newington, CT, 06111
Phone	8778682191
Enumeration date	2007-06-05
Last updated in NPPES	2022-11-01

Authorized official

Name	Charles Bowles
Title	Vice President
Phone	6104546000

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
291U00000X	Clinical Medical Laboratory	Primary	07D1026235	CT

Copy-ready billing details

Provider: Quest Diagnostics LLC
NPI: 1831391473
Taxonomy: 291U00000X (Clinical Medical Laboratory)
Address: 955 MAIN ST, Newington, CT, 06111

Verify this record

Cross-check NPI 1831391473 against the authoritative CMS record: view Quest Diagnostics LLC on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-11-01. Verify at npiregistry.cms.hhs.gov.

Where is Quest Diagnostics LLC located?

The practice location on file with NPPES is in Newington, CT.

Source: CMS NPPES (public data). Snapshot 2026-07-09. Provider record last updated 2022-11-01.