Colleen Callahan, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

CSW.00001313 Issued in CO

Practice address

6507 S Santa Fe Dr
Littleton, CO 80120-2910

Phone

(303) 730-8858

NPI assigned

Oct 22, 2009

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CO

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Social Worker

Education

Other, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Arapahoe Mental Health Center IncGroup PAC ID 7315850708, 126 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Arapahoe Mental Health Center, Inc

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Parker, CO
  • NPI 1437763968
  Medicare reassignment Care Compare group NPD
• Arapahoe Mental Health Center, Inc

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Castle Rock, CO
  • NPI 1326652843
  NPD
• Arapahoe Mental Health Center, Inc

  • Substance Abuse Rehabilitation Facility
  • Watkins, CO
  • NPI 1710868609
  NPD

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

{
    "created_epoch": "1256169600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761004800000",
    "number": "1225364441",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "116 INVERNESS DR E STE 105",
            "city": "ENGLEWOOD",
            "state": "CO",
            "postal_code": "801125125",
            "telephone_number": "037-308-8583"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6507 S SANTA FE DR",
            "city": "LITTLETON",
            "state": "CO",
            "postal_code": "801202910",
            "telephone_number": "303-730-8858"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5967 W Alamo Dr",
            "address_purpose": "LOCATION",
            "city": "Denver",
            "state": "CO",
            "postal_code": "801230893",
            "country_code": "US",
            "telephone_number": "303-918-8199",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CALLAHAN",
        "first_name": "COLLEEN",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2009-10-22",
        "last_updated": "2025-10-21",
        "certification_date": "2025-10-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CO",
            "license": "CSW.00001313",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth Ann Caldwell, FNP
• Elizabeth Carrie Caldwell, RN
• Gabriella Caldwell
• Seaira Louise Caldwell, RMT
• Carter James Calkins, RBT
• Margaret Callahan
• Galen Thornton Callender, DDS
• Lissette Carolina Calveiro
• Erin Calvert
• Carolina Cambra, LPC

• Clinical Social Worker in Littleton, CO
• Providers in Littleton, CO by specialty
• Clinical Social Worker in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 21, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.