Individual provider · Type 1 NPI

Colleen Callahan, LCSW

Clinical Social Worker · Littleton, CO

NPI number 1225364441 Active

Practice location

6507 S Santa Fe Dr
Littleton, CO 80120-2910

Call (303) 730-8858 Map

Mailing address

116 Inverness Dr E Ste 105
Englewood, CO 80112-5125

Other practice locations

  • 5967 W Alamo Dr, Denver, CO 80123-0893 · (303) 918-8199

Specialties and licenses

TaxonomyCodeLicense
Clinical Social Worker Primary 1041C0700XCSW.00001313 (CO)

Clinical Social Worker: A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpers…

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About NPI 1225364441

Colleen Callahan, LCSW's National Provider Identifier is 1225364441, issued on Oct 22, 2009. The primary taxonomy on file is Clinical Social Worker (1041C0700X), and the practice location is in Littleton, CO. The record was last updated on Oct 21, 2025.