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Merle Litowitz, Ph.D., Plc

Clinical Psychologist in Vienna, VA · enumerated 2007 · authorized official Merle Litowitz, Clinical Psychologist.

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

National Provider Identifier

1649306978

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Registry record

Entity type Organization (Type 2)
Legal business name Merle Litowitz, Ph.D., Plc
Practice address 380 Maple Ave W, Suite 200, Vienna, VA, 22180
Phone (703) 255-3400
Fax (703) 255-3400
Enumeration date Feb 23, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810001645 (VA) Primary

Authorized official

Name Merle Litowitz
Title Clinical Psychologist
Phone (703) 255-3400

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 Merle Litowitz, Ph.D., Plc?
The NPI for Merle Litowitz, Ph.D., Plc is 1649306978, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Merle Litowitz, Ph.D., Plc?
NPPES lists Merle Litowitz (Clinical Psychologist) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.