Cecilia Cassidy Lenahan, LCPC, LAC
Addiction (Substance Use Disorder) Counselor · Great Falls, MT
Cecilia Cassidy Lenahan, LCPC, LAC is an addiction (substance use disorder) counselor with a practice address in Great Falls, Montana, and NPI 1659767580, issued on Apr 7, 2015. Check the license (Montana BBH-LAC-LIC-4258, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cecilia Cassidy Lenahan
- Credential
- LCPC, LAC
- Primary taxonomy
- Addiction (Substance Use Disorder) Counselor 101YA0400X
- License numbers
- BBH-LAC-LIC-4258 MT
BBH-LCPC-LIC-81696 MT
Self-reported in NPPES; status is on the state search - Practice location
- 510 1St Ave N, Great Falls, MT 59401
- Phone
- (406) 454-6973
- Enumerated
- Apr 7, 2015
- Record last updated
- Apr 13, 2026
- Fax
- (406) 791-9277
- Medicare enrollment
- Enrolled (PECOS I20251110003227); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest addiction (substance use disorder) counselor records → All 691 in Montana → Look up another NPI →
Also registered at 510 1St Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shannon Hines, LMSW, CSWEClinical Social Worker1861756751
- Mandy Knight, LCSWClinical Social Worker1689091225
- Elijah Sundstrom, ACLCAddiction (Substance Use Disorder) Counselor1386524304
- Julie Trosper, LCPC, ACLCMental Health Counselor1669847661
Verify Cecilia Cassidy Lenahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license BBH-LAC-LIC-4258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Community Health Care Center IncorporatedGreat Falls, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cecilia Cassidy Lenahan among 691 addiction (substance use disorder) counselor records in Montana
Cecilia Cassidy Lenahan, LCPC, LAC is one of 691 addiction (substance use disorder) counselor records with a practice address in Montana. 1% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 36% of them.
- NPI issued2015 · 36% of these records are older, 62% newer
- In a Medicare fileYes · 1% of these records are
- In the CMS Doctors and Clinicians fileYes · 3% of these records are
- Graduated2007 · median 2019 among the 22 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YA0400X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
61 addiction (substance use disorder) counselor records list a practice address in Great Falls
They are 61 of the 1,798 NPPES records with a practice address in Great Falls, and 691 addiction (substance use disorder) counselor records in Montana.
All 691 in Montana → Every provider in Great Falls → Addiction (Substance Use Disorder) Counselor nationwide →
The 8 addiction (substance use disorder) counselor records with the nearest ZIP codes
- Linda Blankenship, LACGreat Falls, MT 594011366579922
- Marcie Dardis, LAC, LPNGreat Falls, MT 594011114281219
- Jeff Fauque, LACGreat Falls, MT 594011972936227
- Ralph Garcia, LACGreat Falls, MT 594011174895320
- Jessica Hofer, LACGreat Falls, MT 594011679984959
- Norbert Houle, LACGreat Falls, MT 594011013189844
- Gary Jaynes, LACGreat Falls, MT 594011417211517
- Barbara Jones, LACGreat Falls, MT 594011649387978
Common questions
What is Cecilia Cassidy Lenahan, LCPC, LAC's NPI number?
Cecilia Cassidy Lenahan, LCPC, LAC's National Provider Identifier (NPI) is 1659767580, issued on Apr 7, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Cecilia Cassidy Lenahan, LCPC, LAC located?
The NPPES record lists a practice address at 510 1St Ave N, Great Falls, MT, 59401. Phone: (406) 454-6973. Providers update this record themselves, so call before visiting.
How can I verify Cecilia Cassidy Lenahan, LCPC, LAC's license?
NPPES lists Montana license number BBH-LAC-LIC-4258, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.