NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Pembrooke Square Ent Associates, LLC

Otolaryngology Physician in Waldorf, MD · enumerated 2007 · authorized official Gary Mason, Owner.

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

National Provider Identifier

1336321462

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Pembrooke Square Ent Associates, LLC
Practice address 11355 Pembrooke Sq Ste 108, Waldorf, MD, 20603
Fax (301) 645-7006
Enumeration date Nov 30, 2007
Last updated in NPPES Nov 30, 2007

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License D0020369 (MD) Primary

Authorized official

Name Gary Mason
Title Owner

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 Pembrooke Square Ent Associates, LLC?
The NPI for Pembrooke Square Ent Associates, LLC is 1336321462, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Pembrooke Square Ent Associates, LLC?
NPPES lists Gary Mason (Owner) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-30.