Active NPI
Jonah Bayer
- Mental Health Counselor
- Williamstown, MA
National Provider Identifier
1235809096
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- License
- LMHC10003468
- Practice address
- 105 Harrison Ave
Williamstown, MA 01267-2237 - Phone
- (413) 599-3420
- NPI assigned
- Sep 14, 2021
- Last updated
- Oct 1, 2025
- Sex
- Male
- Sole proprietor
- Yes
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 | LMHC10003468 | MA | Primary |
Addresses
Primary practice location
105 Harrison Ave
Williamstown, MA 01267-2237
Mailing address
700 Main St Suite 1 #1011
Great Barrington, MA 01230
Phone (413) 599-3420
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: No
- Power mobility devices: No
- Hospice: No
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| LMHC10003468 | MA | MD | Mental Health Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1631577600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1759276800000",
"number": "1235809096",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "700 MAIN ST SUITE 1 #1011",
"city": "GREAT BARRINGTON",
"state": "MA",
"postal_code": "01230",
"telephone_number": "413-599-3420"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "105 HARRISON AVE",
"city": "WILLIAMSTOWN",
"state": "MA",
"postal_code": "012672237",
"telephone_number": "413-599-3420"
}
],
"practiceLocations": [],
"basic": {
"last_name": "BAYER",
"first_name": "JONAH",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2021-09-14",
"last_updated": "2025-10-01",
"certification_date": "2025-10-01",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "MA",
"license": "LMHC10003468",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Williamstown, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 1, 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.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.