Active NPI
Janet Kass, LCSW
- Clinical Social Worker
- Mill Valley, CA
National Provider Identifier
1013018647
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Social Worker
- Practice address
- 222 Mountain View Ave
Mill Valley, CA 94941-1743 - Phone
- (510) 417-6732
- Fax
- (888) 965-0584
- NPI assigned
- Sep 26, 2006
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | R032617-1 | NY | |
| Clinical Social Worker | 1041C0700X | Primary |
Addresses
Primary practice location
222 Mountain View Ave
Mill Valley, CA 94941-1743
Mailing address
222 Mountain View Ave
Mill Valley, CA 94941-1743
Phone (510) 417-6732
Other identifiers 2
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 7482980 | Other | NY | EMPIRE PLAN |
| 000135468 | Other | NY | EXCELLUS BLUE CROSS |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
- 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 |
|---|---|---|---|---|
| I20260401001650 | CA | Practitioner - Clinical Social Worker | 3375538747 | Practice locations: Mill Valley, CA |
Care Compare profile
Medicare Care Compare- Specialty
- Clinical Social Worker
- Education
- Other, 1986
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
Practice addresses (Care Compare)
222 Mountain View Ave
Mill Valley, CA 94941-1743
Phone (510) 417-6732
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| R032617-1 | NY | MD | Mental Health Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1159228800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1768521600000",
"number": "1013018647",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "222 MOUNTAIN VIEW AVE",
"city": "MILL VALLEY",
"state": "CA",
"postal_code": "949411743",
"telephone_number": "510-417-6732",
"fax_number": "888-965-0584"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "222 MOUNTAIN VIEW AVE",
"city": "MILL VALLEY",
"state": "CA",
"postal_code": "949411743",
"telephone_number": "510-417-6732",
"fax_number": "888-965-0584"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KASS",
"first_name": "JANET",
"credential": "LCSW",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2006-09-26",
"last_updated": "2026-01-16",
"certification_date": "2026-01-16",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "NY",
"license": "R032617-1",
"primary": false
},
{
"code": "1041C0700X",
"taxonomy_group": "",
"desc": "Social Worker, Clinical",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "EMPIRE PLAN",
"identifier": "7482980",
"state": "NY"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "EXCELLUS BLUE CROSS",
"identifier": "000135468",
"state": "NY"
}
],
"endpoints": [],
"other_names": []
}
Other providers in Mill Valley, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 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.