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

Haystack Oncology Inc

Q: What is the NPI number for Haystack Oncology Inc?

The NPI for Haystack Oncology Inc is 1396627618, a Type 2 (organization) record in the CMS NPPES registry.

Clinical Medical Laboratory in Baltimore, MD · enumerated 2025 · authorized official Leah Timmerman, Sr. Vice President.

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

National Provider Identifier

1396627618

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Registry record

Entity type Organization (Type 2)

Legal business name Haystack Oncology Inc

Parent organization Quest Diagnostics Incorporated

Practice address 101 W Dickman St Ste 120, Baltimore, MD, 21230

Phone (410) 297-1000

Enumeration date Jul 25, 2025

Last updated in NPPES Jul 25, 2025

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name Leah Timmerman

Title Sr. 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 the NPI number for Haystack Oncology Inc?

The NPI for Haystack Oncology Inc is 1396627618, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Haystack Oncology Inc?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-25.