OrganizationActive
Quest Diagnostics Incorporated
NPI 1386783637 · Clinical Medical Laboratory · Downey, CA
Quest Diagnostics Incorporated is a Clinical Medical Laboratory organization in Downey, CA (NPI 1386783637).
Provider details
- NPI number
- 1386783637
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Parent organization
- Quest Diagnostics Incorporated
- Organization subpart
- Yes
- Authorized official
- Gerald Cartier, Vp of Revenu Services(484) 676-7000
- License
- 05D0547573 (CA)
Specialties & taxonomies
Laboratories
Profile Score
Detailed profile(90/100 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
11411 S Brookshire Ave
Ste 203
Downey, CA 90241-5003
Phone: (562) 923-5474
Street-level locationGet directions
Mailing address
1001 Adams Ave Mrgov
Norristown, PA 19403-2429
Other names (DBA / former)
- Doing business as
- Quest Diagnostics
Registry dates
- Enumerated
- 2007-02-05
- Last updated
- 2012-10-22
Frequently asked questions
- What is Quest Diagnostics Incorporated's NPI number?
- Quest Diagnostics Incorporated's National Provider Identifier (NPI) is 1386783637, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Quest Diagnostics Incorporated?
- Quest Diagnostics Incorporated is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Quest Diagnostics Incorporated located?
- Quest Diagnostics Incorporated's practice location on file with NPPES is 11411 S Brookshire Ave, Downey, CA 90241-5003.
- What is Quest Diagnostics Incorporated's phone number?
- The practice phone number listed in the NPPES registry for Quest Diagnostics Incorporated is (562) 923-5474.
- Who is the authorized official for Quest Diagnostics Incorporated?
- The authorized official listed on Quest Diagnostics Incorporated's NPPES record is Gerald Cartier, Vp of Revenu Services. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Quest Diagnostics Incorporated's NPI active?
- Yes — Quest Diagnostics Incorporated's NPI (1386783637) is active in the NPPES registry as of the last update on 2012-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.