Cecilia Lenahan, LCPC, LAC
NPI 1659767580 · Addiction (Substance Use Disorder) Counselor · Great Falls, MT
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cecilia Lenahan, LCPC, LAC is a Addiction (Substance Use Disorder) Counselor provider in Great Falls, MT (NPI 1659767580).
Provider details
- NPI number
- 1659767580
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LCPC, LAC
- Sex
- Female
- Sole proprietor
- No
- License
- BBH-LCPC-LIC-81696 (MT)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 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 (2)
- 2400 Central Ave Rm 118Great Falls, MT 59401-3915Phone: (406) 454-6973Fax: (406) 791-9277
- 3911 Central AveGreat Falls, MT 59405-1637Phone: (406) 454-6973Fax: (406) 791-9277
Registry dates
- Enumerated
- 2015-04-07
- Last updated
- 2026-04-13
- Certified
- 2026-04-13
Frequently asked questions
- What is Cecilia Lenahan's NPI number?
- Cecilia Lenahan's National Provider Identifier (NPI) is 1659767580, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cecilia Lenahan's specialty?
- Cecilia Lenahan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Cecilia Lenahan located?
- Cecilia Lenahan's practice location on file with NPPES is 510 1st Ave N, Great Falls, MT 59401-2592.
- What is Cecilia Lenahan's phone number?
- The practice phone number listed in the NPPES registry for Cecilia Lenahan is (406) 454-6973.
- Does Cecilia Lenahan accept Medicare?
- Cecilia Lenahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cecilia Lenahan's NPI active?
- Yes — Cecilia Lenahan's NPI (1659767580) is active in the NPPES registry as of the last update on 2026-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.