Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sally Singer Horwatt, Ph.D., PC

Q: What is the NPI number for Sally Singer Horwatt, Ph.D., PC?

The NPI for Sally Singer Horwatt, Ph.D., PC is 1386767507, a Type 2 (organization) record in the CMS NPPES registry.

Clinical Psychologist in Reston, VA · enumerated 2007 · authorized official Sally Horwatt, President.

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

National Provider Identifier

1386767507

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Registry record

Entity type Organization (Type 2)

Legal business name Sally Singer Horwatt, Ph.D., PC

Practice address 1800 Town Center Dr, Suite 216, Reston, VA, 20190

Phone (703) 435-4741

Fax (703) 435-5881

Enumeration date Apr 10, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810000918 (VA) Primary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License 0810000918 (VA) Secondary

Authorized official

Name Sally Horwatt

Title President

Phone (703) 435-4741

Other identifiers

Identifier	Type	State	Issuer
87726	Other	VA	UNITED BEHAVIORAL HEALTH
4602666	Other	VA	AETNA

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

Who is the authorized official for Sally Singer Horwatt, Ph.D., PC?

NPPES lists Sally Horwatt (President) as the authorized official for this organization.

What is the NPI number for Sally Singer Horwatt, Ph.D., PC?

The NPI for Sally Singer Horwatt, Ph.D., PC is 1386767507, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.