NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Katharine Zener Rossier, MSW

Clinical Social Worker in Vienna, VA · enumerated 2007 · practices at The Collaborative Good, LLC.

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

National Provider Identifier

1598813354

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Ms. Katharine Zener Rossier
Credential MSW
Sex Female
Practice address Vienna, VA, 22180
Phone (703) 281-4928
Enumeration date Jan 8, 2007
Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 0904006473 (VA) Primary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LC50078336 (DC) Secondary

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 is the NPI number for Katharine Rossier?
The National Provider Identifier (NPI) for Katharine Rossier is 1598813354, a Type 1 (individual) record in the CMS NPPES registry.
Where does Katharine Rossier practice?
The practice location on file with NPPES is in Vienna, VA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.