Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Marcey Halfway House

Q: What is the NPI number for Marcey Halfway House?

The NPI for Marcey Halfway House is 1639155666, a Type 2 (organization) record in the CMS NPPES registry.

Substance Abuse Rehabilitation Facility in Leonardtown, MD · enumerated 2005 · authorized official Larry Harvey, Director.

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

National Provider Identifier

1639155666

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Registry record

Entity type Organization (Type 2)

Legal business name Marcey Halfway House

Practice address 41550 Doctors Crossing Way, Leonardtown, MD, 20650

Phone (301) 475-4701

Fax (301) 475-4947

Enumeration date Dec 21, 2005

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

324500000X Substance Abuse Rehabilitation Facility Residential Treatment Facilities · License 10754 (MD) Primary

Authorized official

Name Larry Harvey

Title Director

Phone (301) 415-4701

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 Marcey Halfway House?

The NPI for Marcey Halfway House is 1639155666, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Marcey Halfway House?

NPPES lists Larry Harvey (Director) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.