Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Quest Diagnostics Clinical Laboratories Inc

Clinical Medical Laboratory in Maryland Heights, MO · enumerated 2007 · authorized official Leah Timmerman, Vice President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1104016088

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Quest Diagnostics Clinical Laboratories Inc

Parent organization Quest Diagnostics Incorporated

Practice address 11636 Administration Drive, Maryland Heights, MO, 63146

Phone (314) 872-6302

Enumeration date Jul 27, 2007

Last updated in NPPES Feb 6, 2025

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License 26D0652092 (MO) Primary

Authorized official

Name Leah Timmerman

Title Vice President

Phone (973) 520-2700

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 → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Quest Diagnostics Clinical Laboratories Inc?

Quest Diagnostics Clinical Laboratories Inc is registered in NPPES as a Clinical Medical Laboratory (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-06.