Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Katherine Ann Leonberger Stein, PSY D
Clinical Psychologist in Vienna, VA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1427598549
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Registry record
Entity type Individual (Type 1)
Name Dr. Katherine Ann Leonberger Stein
Credential PSY D
Sex Female
Practice address 8381 Old Courthouse Road, Suite 330, Vienna, VA, 22182
Phone (703) 938-9090
Fax (703) 938-9091
Enumeration date Mar 8, 2017
Last updated in NPPES Aug 24, 2021
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810005480 (VA) Primary
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice.
About the PSYD credential
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.
Frequently asked questions
Where does Katherine Stein practice?
The practice location on file with NPPES is in Vienna, VA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Katherine Stein?
The National Provider Identifier (NPI) for Katherine Stein is 1427598549, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-24.