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 1699484394 since 2022. The authorized official on file is Michael Ostrowski, Billing Manager.
✓ Active NPI ✓ Valid NPI checksum Organization subpart
| NPI | 1699484394 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Cornerstone Montgomery, Inc. |
| Parent organization | Cornerstone Montgomery, Inc. |
| Practice address | 305 PRINCE FREDERICK BLVD, Prince Frederick, MD, 20678 |
| Phone | 4105354787 |
| Fax | 4105354965 |
| Enumeration date | 2022-11-21 |
| Last updated in NPPES | 2022-11-21 |
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: 1699484394 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 1699484394 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
What is a Type 2 NPI?
What type of organization is Cornerstone Montgomery, Inc.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-11-21.