Colleen Callahan, LCSW
NPI 1225364441 · Clinical Social Worker · Littleton, CO
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Callahan, LCSW is a Clinical Social Worker provider in Littleton, CO (NPI 1225364441).
Provider details
- NPI number
- 1225364441
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- CSW.00001313 (CO)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 5967 W Alamo DrDenver, CO 80123-0893Phone: (303) 918-8199
Registry dates
- Enumerated
- 2009-10-22
- Last updated
- 2025-10-21
- Certified
- 2025-10-21
Frequently asked questions
- What is Colleen Callahan's NPI number?
- Colleen Callahan's National Provider Identifier (NPI) is 1225364441, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Callahan's specialty?
- Colleen Callahan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Colleen Callahan located?
- Colleen Callahan's practice location on file with NPPES is 6507 S Santa Fe Dr, Littleton, CO 80120-2910.
- What is Colleen Callahan's phone number?
- The practice phone number listed in the NPPES registry for Colleen Callahan is (303) 730-8858.
- Does Colleen Callahan accept Medicare?
- Colleen Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Callahan's NPI active?
- Yes — Colleen Callahan's NPI (1225364441) is active in the NPPES registry as of the last update on 2025-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.