NPIMap

Organization Active NPI

Sally Singer Horwatt, PH.D., PC

  • Clinical Psychologist
  • Reston, VA
National Provider Identifier
1386767507
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical PsychologistTaxonomy code 103TC0700X
License
0810000918 Issued in VA
Legal business name
SALLY SINGER HORWATT, PH.D., PC
Practice address
1800 Town Center Dr
Suite 216
Reston, VA 20190-3215
Phone
(703) 435-4741
Fax
(703) 435-5881
NPI assigned
Apr 10, 2007
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name
Dr. Sally Singer Horwatt, PH.D.NPI 1609945583
Title
President
Phone
(703) 435-4741

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical PsychologistGroup: 193200000X MULTI-SPECIALTY GROUP 103TC0700X 0810000918 VA Primary
Group Psychotherapy PsychologistGroup: 193200000X MULTI-SPECIALTY GROUP 103TP2701X 0810000918 VA

Addresses

Primary practice location

1800 Town Center Dr
Suite 216
Reston, VA 20190-3215

Mailing address

1800 Town Center Dr
Suite 216
Reston, VA 20190-3215
Phone (703) 435-4741

Other identifiers 2

IdentifierTypeStateIssuer
87726OtherVAUNITED BEHAVIORAL HEALTH
4602666OtherVAAETNA

National Provider Directory

National Provider Directory

Locations

1800 Town Center Dr
Ste 216
Reston, VA 20190
Phone (703) 435-4741

Practitioners & affiliated clinicians

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1176163200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1386767507",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1800 TOWN CENTER DR",
            "address_2": "SUITE 216",
            "city": "RESTON",
            "state": "VA",
            "postal_code": "201903215",
            "telephone_number": "703-435-4741",
            "fax_number": "703-435-5881"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1800 TOWN CENTER DR",
            "address_2": "SUITE 216",
            "city": "RESTON",
            "state": "VA",
            "postal_code": "201903215",
            "telephone_number": "703-435-4741",
            "fax_number": "703-435-5881"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "SALLY SINGER HORWATT, PH.D., PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-04-10",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "HORWATT",
        "authorized_official_first_name": "SALLY",
        "authorized_official_middle_name": "SINGER",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "703-435-4741",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "PH.D."
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychologist, Clinical",
            "state": "VA",
            "license": "0810000918",
            "primary": true
        },
        {
            "code": "103TP2701X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychologist, Group Psychotherapy",
            "state": "VA",
            "license": "0810000918",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "UNITED BEHAVIORAL HEALTH",
            "identifier": "87726",
            "state": "VA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "4602666",
            "state": "VA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Reston, VA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.