Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Chesapeake Toxicology Resources, LLC

Clinical Medical Laboratory in Frederick, MD · enumerated 2015 · authorized official Justin Holler, Managing Partner.

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

National Provider Identifier

1992160436

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Chesapeake Toxicology Resources, LLC

Practice address 8415 Progress Dr Unit V, Frederick, MD, 21701

Phone (240) 397-7060

Enumeration date Dec 29, 2015

Last updated in NPPES Mar 11, 2026

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License 2102105193 (MD) Primary

Authorized official

Name Justin Holler

Title Managing Partner

Phone (240) 397-7058

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 Chesapeake Toxicology Resources, LLC?

Chesapeake Toxicology Resources, LLC 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 2026-03-11.