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

The Neurological Medicine Sleep Laboratory

Neurology Physician in Greenbelt, MD · enumerated 2009 · authorized official William Leahy, President.

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

National Provider Identifier

1740519826

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Registry record

Entity type Organization (Type 2)

Legal business name The Neurological Medicine Sleep Laboratory

Parent organization Neurological Medicine, P.A.

Practice address 7500 Hanover Parkway Greenbelt, MD 20770-2009, Suite 201, Greenbelt, MD, 20770

Phone (301) 982-7944

Fax (301) 441-8696

Enumeration date Dec 18, 2009

Last updated in NPPES Aug 21, 2024

Taxonomy & classification

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name William Leahy

Title President

Phone (301) 982-7944

Other identifiers

Identifier	Type	State	Issuer
1654	Other	DC	CAREFIRST BCBS OF DC
H832NE	Other	MD	CAREFIRST BCBS OF MD
912931600	Medicaid	MD	-

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 The Neurological Medicine Sleep Laboratory?

The Neurological Medicine Sleep Laboratory is registered in NPPES as a Neurology Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-21.