Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Cassandra Lauren Rostad

Addiction (Substance Use Disorder) Counselor in Massapequa, NY · enumerated 2018 · practices at Youth Environmental Services, Inc..

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

National Provider Identifier

1548739816

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Registry record

Entity type Individual (Type 1)

Name Ms. Cassandra Lauren Rostad

Sex Female

Practice address 75 Grand Ave, Massapequa, NY, 11758

Phone (516) 799-3203

Fax (516) 799-3081

Enumeration date Nov 16, 2018

Last updated in NPPES Nov 16, 2018

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Primary

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 is the NPI number for Cassandra Rostad?

The National Provider Identifier (NPI) for Cassandra Rostad is 1548739816, a Type 1 (individual) record in the CMS NPPES registry.

Where does Cassandra Rostad practice?

The practice location on file with NPPES is in Massapequa, NY. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-16.