OrganizationActive
Quest Diagnostics LLC
NPI 1780886333 · Clinical Medical Laboratory · Stamford, CT
Quest Diagnostics LLC is a Clinical Medical Laboratory organization in Stamford, CT (NPI 1780886333).
Provider details
- NPI number
- 1780886333
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Parent organization
- Quest Diagnostics Incorporated
- Organization subpart
- Yes
- Authorized official
- G Cartier, Vp of Billing(484) 676-7731
Specialties & taxonomies
Laboratories
Profile Score
Detailed profile(89/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1250 Summer St
Suite 206
Stamford, CT 06905-5358
Phone: (877) 868-2191
Street-level locationGet directions
Mailing address
2750 Monroe Blvd
Norristown, PA 19403-2429
Registry dates
- Enumerated
- 2007-06-05
- Last updated
- 2007-11-26
Frequently asked questions
- What is Quest Diagnostics LLC's NPI number?
- Quest Diagnostics LLC's National Provider Identifier (NPI) is 1780886333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Quest Diagnostics LLC?
- Quest Diagnostics LLC is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Quest Diagnostics LLC located?
- Quest Diagnostics LLC's practice location on file with NPPES is 1250 Summer St, Stamford, CT 06905-5358.
- What is Quest Diagnostics LLC's phone number?
- The practice phone number listed in the NPPES registry for Quest Diagnostics LLC is (877) 868-2191.
- Who is the authorized official for Quest Diagnostics LLC?
- The authorized official listed on Quest Diagnostics LLC's NPPES record is G Cartier, Vp of Billing. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Quest Diagnostics LLC's NPI active?
- Yes — Quest Diagnostics LLC's NPI (1780886333) is active in the NPPES registry as of the last update on 2007-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.