Quest Diagnostics LLC
Quest Diagnostics LLC is a healthcare organization registered as Clinical Medical Laboratory in Branford, CT, holding Type 2 (organization) NPI 1841492444 since 2007. The authorized official on file is G Cartier, Vp of Billing.
✓ Active NPI ✓ Valid NPI checksum Organization subpart
| NPI | 1841492444 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Quest Diagnostics LLC |
| Parent organization | Quest Diagnostics Incorporated |
| Practice address | 1008 MAIN ST, Branford, CT, 06405 |
| Phone | 2039491260 |
| Enumeration date | 2007-06-05 |
| Last updated in NPPES | 2008-03-17 |
Authorized official
| Name | G Cartier |
|---|---|
| Title | Vp of Billing |
| Phone | 4846767000 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 291U00000X | Clinical Medical Laboratory | Primary | — | CT |
Copy-ready billing details
Provider: Quest Diagnostics LLC NPI: 1841492444 Taxonomy: 291U00000X (Clinical Medical Laboratory) Address: 1008 MAIN ST, Branford, CT, 06405
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1053477703 | Reza Yavari | Individual | Endocrinology, Diabetes & Metabolism Physician | Branford, CT |
Verify this record
Cross-check NPI 1841492444 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
What is the NPI number for Quest Diagnostics LLC?
Who is the authorized official for Quest Diagnostics LLC?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2008-03-17.