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Mrs. Diane Susan Cassilly, LCSWC

Clinical Social Worker in Fallston, MD · enumerated 2007.

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

National Provider Identifier

1417163395

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Registry record

Entity type Individual (Type 1)
Name Mrs. Diane Susan Cassilly
Credential LCSWC
Sex Female
Practice address 1716 Harford Rd, Suite 204, Fallston, MD, 21047
Phone (410) 877-7207
Fax (410) 877-7224
Enumeration date May 15, 2007
Last updated in NPPES Mar 25, 2009

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 09946 (MD) Primary

Other identifiers

Identifier Type State Issuer
KC83 Other MD CAREFIRST BLUE CROSS BLUE
T460 Other MD BLUE CHOICE

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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Diane Cassilly?
Diane Cassilly is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-03-25.