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Expression Pathology Incorporated

Clinical Medical Laboratory in Rockville, MD · enumerated 2012 · authorized official Thomas Guiel, Chief Operating Officer.

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

National Provider Identifier

1184971855

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Registry record

Entity type Organization (Type 2)
Legal business name Expression Pathology Incorporated
Other name <Unavail>
Practice address 9620 Medical Center Dr, Suite 100, Rockville, MD, 20850
Phone (301) 977-3654
Fax (301) 926-9283
Enumeration date Aug 13, 2012
Last updated in NPPES Sep 28, 2012

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License 21D2043150 (MD) Primary

Authorized official

Name Thomas Guiel
Title Chief Operating Officer
Phone (301) 977-3654

Other identifiers

Identifier Type State Issuer
1872 Other MD MEDICAL LABORATORY PERMIT
21D2043150 Other - CLIA ID NUMBER

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.

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Frequently asked questions

Who is the authorized official for Expression Pathology Incorporated?
NPPES lists Thomas Guiel (Chief Operating Officer) as the authorized official for this organization.
What is the NPI number for Expression Pathology Incorporated?
The NPI for Expression Pathology Incorporated is 1184971855, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-28.