Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Danielle Rosnov-Castelar, Phd LLC

Clinical Psychologist in Chantilly, VA · enumerated 2016 · authorized official Danielle Rosnov-Castelar, Owner/Psychologist.

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

National Provider Identifier

1962946301

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Registry record

Entity type Organization (Type 2)

Legal business name Danielle Rosnov-Castelar, Phd LLC

Other name <Unavail>

Practice address 4443 Brookfield Corporate Dr., Suite 100, Chantilly, VA, 20151

Phone (571) 261-8239

Fax (571) 207-9049

Enumeration date Dec 5, 2016

Last updated in NPPES Mar 12, 2024

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810004178 (VA) Primary

Authorized official

Name Danielle Rosnov-Castelar

Title Owner/Psychologist

Phone (571) 261-8239

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 → Validate an NPI →

Frequently asked questions

What type of organization is Danielle Rosnov-Castelar, Phd LLC?

Danielle Rosnov-Castelar, Phd LLC is registered in NPPES as a Clinical Psychologist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-12.