Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Cornerstone Montgomery, Inc.

Q: What type of organization is Cornerstone Montgomery, Inc.?

Cornerstone Montgomery, Inc. is registered in NPPES as a Mental Health Clinic/Center (Including Community Mental Health Center) (its primary provider taxonomy).

Mental Health Clinic/Center (Including Community Mental Health Center) in Bethesda, MD · enumerated 2005 · authorized official Michael Ostrowski, Billing Supervisor.

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

National Provider Identifier

1194725739

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Cornerstone Montgomery, Inc.

Practice address 6040 Southport Dr, Bethesda, MD, 20814

Phone (301) 493-4200

Fax (301) 493-6209

Enumeration date Jul 26, 2005

Last updated in NPPES Feb 18, 2020

Taxonomy & classification

261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities Primary

Authorized official

Name Michael Ostrowski

Title Billing Supervisor

Phone (301) 493-4200

Other identifiers

Identifier	Type	State	Issuer
WST000010	Other	VA	VALUEOPTIONS
837AST	Other	MD	BLUE CROSS BLUE SHIELD
2525020-00	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.

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Frequently asked questions

What type of organization is Cornerstone Montgomery, Inc.?

Cornerstone Montgomery, Inc. is registered in NPPES as a Mental Health Clinic/Center (Including Community Mental Health Center) (its primary provider taxonomy).

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.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-18.