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

Quest Diagnostics Clinical Laboratories Inc

Q: What is the NPI number for Quest Diagnostics Clinical Laboratories Inc?

The NPI for Quest Diagnostics Clinical Laboratories Inc is 1487179123, a Type 2 (organization) record in the CMS NPPES registry.

Clinical Medical Laboratory in Billings, MT · enumerated 2017 · authorized official Leah Timmerman, Sr. Vp.

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

National Provider Identifier

1487179123

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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 2900 12th Ave N Ste 255w, Billings, MT, 59101

Phone (406) 238-1800

Enumeration date Aug 3, 2017

Last updated in NPPES Nov 20, 2024

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name Leah Timmerman

Title Sr. Vp

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

Who is the authorized official for Quest Diagnostics Clinical Laboratories Inc?

NPPES lists Leah Timmerman (Sr. Vp) as the authorized official for this organization.

What is the NPI number for Quest Diagnostics Clinical Laboratories Inc?

The NPI for Quest Diagnostics Clinical Laboratories Inc is 1487179123, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-20.