NPIMap

Organization Active NPI

Keystone Service Systems, Inc.

  • Intellectual & Developmental Disabilities Psychologist
  • Harrisburg, PA
National Provider Identifier
1568525640
Registry record updated Apr 22, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Intellectual & Developmental Disabilities PsychologistTaxonomy code 103TM1800X
Legal business name
KEYSTONE SERVICE SYSTEMS, INC.
Practice address
4391 Sturbridge Dr
Harrisburg, PA 17110-3673
Phone
(717) 232-7509
Fax
(717) 232-6687
NPI assigned
Dec 19, 2006
Last updated
Apr 22, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Apr 22, 2026

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

Authorized official

Name
Mr. Charles S. Sweeder
Title
Chief Executive Officer
Phone
(717) 232-7509

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Intellectual & Developmental Disabilities Psychologist 103TM1800X Primary

Addresses

Primary practice location

4391 Sturbridge Dr
Harrisburg, PA 17110-3673

Mailing address

4391 Sturbridge Dr
Harrisburg, PA 17110-3673
Phone (717) 740-2949

Other identifiers 1

IdentifierTypeStateIssuer
0001018356MedicaidDE

National Provider Directory

National Provider Directory
Tax ID family
Keystone Service Systems Inc52 organizations share this tax ID, including this one

Organizations with this tax ID in the same state 24

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

View all 24

Locations

300 Creek View Rd
Ste 210
Newark, DE 19711

NPI Registry JSON

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

{
    "created_epoch": "1166486400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1776816000000",
    "number": "1568525640",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4391 STURBRIDGE DR",
            "city": "HARRISBURG",
            "state": "PA",
            "postal_code": "171103673",
            "telephone_number": "717-740-2949",
            "fax_number": "717-232-4597"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4391 STURBRIDGE DR",
            "city": "HARRISBURG",
            "state": "PA",
            "postal_code": "171103673",
            "telephone_number": "717-232-7509",
            "fax_number": "717-232-6687"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "KEYSTONE SERVICE SYSTEMS, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-12-19",
        "last_updated": "2026-04-22",
        "certification_date": "2026-04-22",
        "status": "A",
        "authorized_official_last_name": "SWEEDER",
        "authorized_official_first_name": "CHARLES",
        "authorized_official_middle_name": "S.",
        "authorized_official_title_or_position": "CHIEF EXECUTIVE OFFICER",
        "authorized_official_telephone_number": "717-232-7509",
        "authorized_official_name_prefix": "Mr."
    },
    "taxonomies": [
        {
            "code": "103TM1800X",
            "taxonomy_group": "",
            "desc": "Psychologist, Intellectual & Developmental Disabilities",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0001018356",
            "state": "DE"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Harrisburg, PA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 22, 2026; 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.