CORNERSTONE MONTGOMERY, INC.
NPI 1194725739
Clinic/Center - Mental Health (Including Community Mental Health Center) in Bethesda, MD
About Cornerstone Montgomery, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CORNERSTONE MONTGOMERY, INC. (NPI 1194725739) is a healthcare organization registered as a mental health (including community mental health center) in Bethesda, Maryland and active in the NPI registry since July 2005. The organization lists Michael Ostrowski, Billing Supervisor, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Cornerstone Montgomery, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
50Medicare enrollment records show 50 clinicians reassign Medicare billing to Cornerstone Montgomery, Inc., which bills Medicare for the services they deliver. Of these, 3 practice at this address and 26 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 5
Nearest to this location (20)
See all 50Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Cornerstone Montgomery, Inc.'s NPI number?
The NPI number for Cornerstone Montgomery, Inc. is 1194725739. It was assigned to this organization in the NPPES registry on July 26, 2005.
Where is Cornerstone Montgomery, Inc. located?
Cornerstone Montgomery, Inc. is located at 6040 Southport Dr, Bethesda, MD 20814. The listed phone number is (301) 493-4200.
What is Cornerstone Montgomery, Inc.'s specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.
Is Cornerstone Montgomery, Inc. enrolled in Medicare?
Yes. Cornerstone Montgomery, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Cornerstone Montgomery, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 50 clinicians in 5 Medicare specialties reassign their Medicare billing to Cornerstone Montgomery, Inc.. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (16), Psychiatry (14) and Clinical Social Worker (13). Of these, 3 practice at this address and 26 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Cornerstone Montgomery, Inc. was last updated on February 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Cornerstone Montgomery, Inc. · NPI 1194725739
Mental Health (Including Community Mental Health Center) organization in Bethesda, Maryland. Organization record, active in the CMS NPPES registry since July 26, 2005.
## Identity
- **NPI:** 1194725739 (Entity type: Organization)
- **Enumerated:** July 26, 2005
- **Primary specialty:** Clinic/Center - Mental Health (Including Community Mental Health Center) · taxonomy 261QM0801X
- **Organization subpart:** No
- **Authorized official:** Michael Ostrowski, BILLING SUPERVISOR
## Practice location
- **Address:** 6040 SOUTHPORT DR, Bethesda, MD 20814-1848
- **Phone:** (301) 493-4200 · **Fax:** (301) 493-6209
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 50 clinicians in 5 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (16), Psychiatry (14), Clinical Social Worker (13); 3 practice at this address and 26 within 10 miles; [full list](https://npiprofile.com/npi/1194725739/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 18, 2020
- **Other identifiers:** Other WST000010 (VA); Medicaid 2525020-00 (MD); Other 837AST (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1194725739) · Data from the CMS NPPES public registry.