Quest Diagnostics LLC

Quest Diagnostics LLC is a healthcare organization registered as Clinical Medical Laboratory in Marlborough, MA, holding Type 2 (organization) NPI 1952347791 since 2006. The authorized official on file is Charles Bowles, Sr. Vice President.

✓ Active NPI ✓ Valid NPI checksum Organization subpart

NPI	1952347791
Entity type	Organization (Type 2)
Legal business name	Quest Diagnostics LLC
Parent organization	Quest Diagnostics Incorporated
Practice address	200 FOREST ST, 3RD FLOOR,SUITE B, Marlborough, MA, 01752
Phone	7743693900
Enumeration date	2006-06-21
Last updated in NPPES	2024-02-12

Authorized official

Name	Charles Bowles
Title	Sr. Vice President
Phone	6104544122

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
291U00000X	Clinical Medical Laboratory	Primary	22D0076229	MA

Copy-ready billing details

Provider: Quest Diagnostics LLC
NPI: 1952347791
Taxonomy: 291U00000X (Clinical Medical Laboratory)
Address: 200 FOREST ST, 3RD FLOOR,SUITE B, Marlborough, MA, 01752

Providers at this address

NPI	Name	Type	Specialty	Location
1326037490	Lisa Blazejewski	Individual	Genetic Counselor (M.S.)	Marlborough, MA
1023063062	Blueprint Genetics Inc.	Organization	Clinical Medical Laboratory	Marlborough, MA
1831234939	Athena Diagnostics, Inc.	Organization	Clinical Medical Laboratory	Marlborough, MA
1699040964	Meagan Nashawaty	Individual	Genetic Counselor (M.S.)	Marlborough, MA
1194062448	Quest Diagnostics Massachusetts LLC	Organization	Clinical Medical Laboratory	Marlborough, MA
1699175760	Ameripath New York, LLC	Organization	Clinical Medical Laboratory	Marlborough, MA
1770383085	Lokinendi Rao	Individual	Clinical Laboratory Director (Non-physician)	Marlborough, MA

Verify this record

Cross-check NPI 1952347791 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 2024-02-12. Verify at npiregistry.cms.hhs.gov.

Where is Quest Diagnostics LLC located?

The practice location on file with NPPES is in Marlborough, MA.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2024-02-12.