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Cornerstone Montgomery, Inc.

Community/Behavioral Health Agency in Waldorf, MD · enumerated 2023 · authorized official Michael Ostrowski, Billing Manager.

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

National Provider Identifier

1609579614

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Registry record

Entity type Organization (Type 2)
Legal business name Cornerstone Montgomery, Inc.
Practice address 2670 Crain Hwy Ste 505, Waldorf, MD, 20601
Phone (301) 932-9146
Fax (301) 932-9361
Enumeration date Mar 27, 2023
Last updated in NPPES Mar 27, 2023

Taxonomy & classification

251S00000X Community/Behavioral Health Agency Agencies Primary

Authorized official

Name Michael Ostrowski
Title Billing Manager
Phone (301) 493-4200

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

Where is Cornerstone Montgomery, Inc. located?
The practice location on file with NPPES is in Waldorf, MD.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2023-03-27. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-27.