Active NPI
Lesly Marie Kassmier, LCPC
- Mental Health Counselor
- Lewistown, MT
National Provider Identifier
1740617075
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- License
- 4691
- Practice address
- 712 W Water St
Lewistown, MT 59457-3160 - Phone
- (406) 366-0205
- NPI assigned
- Oct 1, 2013
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | 4691 | MT | Primary |
Addresses
Primary practice location
712 W Water St
Lewistown, MT 59457-3160
Mailing address
PO Box 1419
Fort Benton, MT 59442-1419
Phone (406) 496-6314
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MT
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: No
- Power mobility devices: No
- Hospice: No
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20250903003817 | MT | Practitioner - Mental Health Counselor | 5799287470 | Practice locations: Lewistown, MT |
Care Compare profile
Medicare Care Compare- Specialty
- Mental Health Counselor
- Education
- Other, 2011
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
Practice addresses (Care Compare)
112 Silver Dr
Lewistown, MT 59457-3246
5305 N Montana Ave
Helena, MT 59602-7036
712 W Water St
Lewistown, MT 59457-3160
Phone (406) 366-0205
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 4691 | MT | MD | Mental Health Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1380585600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1769558400000",
"number": "1740617075",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 1419",
"city": "FORT BENTON",
"state": "MT",
"postal_code": "594421419",
"telephone_number": "406-496-6314"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "712 W WATER ST",
"city": "LEWISTOWN",
"state": "MT",
"postal_code": "594573160",
"telephone_number": "406-366-0205"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KASSMIER",
"first_name": "LESLY",
"middle_name": "MARIE",
"credential": "LCPC",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2013-10-01",
"last_updated": "2026-01-28",
"certification_date": "2026-01-28",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "MT",
"license": "4691",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Lewistown, MT
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 28, 2026; 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.