Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Developmental Services of Sullivan County, Inc.

Child Intellectual and/or Developmental Disabilities Respite Care in Claremont, NH · enumerated 2007 · authorized official Mark Mills, Chief Executive Officer.

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

National Provider Identifier

1295957561

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Registry record

Entity type Organization (Type 2)

Legal business name Developmental Services of Sullivan County, Inc.

Other name <Unavail>

Practice address 654 Main Street, Claremont, NH, 03743

Phone (603) 542-8706

Fax (603) 542-2729

Enumeration date May 3, 2007

Last updated in NPPES Mar 15, 2022

Taxonomy & classification

385HR2060X Child Intellectual and/or Developmental Disabilities Respite Care Respite Care Facility · License 99560052 (NH) Primary

Authorized official

Name Mark Mills

Title Chief Executive Officer

Phone (603) 542-8706

Other identifiers

Identifier	Type	State	Issuer
30532133	Medicaid	NH	-
99560052	Medicaid	NH	-
60000002	Medicaid	NH	-
99590002	Medicaid	NH	-
99590022	Medicaid	NH	-
99560008	Medicaid	NH	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Developmental Services of Sullivan County, Inc.?

NPPES lists Mark Mills (Chief Executive Officer) as the authorized official for this organization.

What is the NPI number for Developmental Services of Sullivan County, Inc.?

The NPI for Developmental Services of Sullivan County, Inc. is 1295957561, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-15.