Cornerstone Montgomery, Inc.
Cornerstone Montgomery, Inc. is a healthcare organization registered as Community/Behavioral Health Agency in Prince Frederick, MD, holding Type 2 (organization) NPI 1245933597 since 2023. The authorized official on file is Michael Ostrowski, Billing Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1245933597 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Cornerstone Montgomery, Inc. |
| Practice address | 305 PRINCE FREDERICK BLVD, Prince Frederick, MD, 20678 |
| Phone | 4105354787 |
| Fax | 4105354965 |
| Enumeration date | 2023-03-24 |
| Last updated in NPPES | 2023-03-24 |
Authorized official
| Name | Michael Ostrowski |
|---|---|
| Title | Billing Manager |
| Phone | 3014934200 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 251S00000X | Community/Behavioral Health Agency | Primary | — | — |
Copy-ready billing details
Provider: Cornerstone Montgomery, Inc. NPI: 1245933597 Taxonomy: 251S00000X (Community/Behavioral Health Agency) Address: 305 PRINCE FREDERICK BLVD, Prince Frederick, MD, 20678
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1356474399 | Southern Maryland Community Network, Inc. | Organization | Mental Illness Community Based Residential Treatment Facility | Prince Frederick,, MD |
| 1922325398 | Southern Maryland Community Network, Inc. | Organization | Case Management Agency | Prince Frederick, MD |
| 1881988400 | Diane Saccoccio | Individual | Social Worker | Prince Frederick, MD |
| 1295172807 | Sierra Walden Inc | Organization | Addiction (Substance Use Disorder) Counselor | Prince Frederick, MD |
| 1881026409 | Walden Sierra | Organization | Community/Behavioral Health Agency | Prince Frederick, MD |
| 1932525300 | Walden Sierra | Organization | Community/Behavioral Health Agency | Prince Frederick, MD |
| 1184044943 | Karen Carloni | Individual | Professional Counselor | Prince Frederick, MD |
| 1013469832 | Southern Maryland Community Network, Inc | Organization | Mental Illness Community Based Residential Treatment Facility | Prince Frederick, MD |
Verify this record
Cross-check NPI 1245933597 against the authoritative CMS record: view Cornerstone Montgomery, Inc. on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
Who is the authorized official for Cornerstone Montgomery, Inc.?
What is the NPI number for Cornerstone Montgomery, Inc.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-03-24.