Active NPI
Marley Alexandra Sepinuck, MSW, LCSW
- Social Worker
- Boston, MA
National Provider Identifier
1225877921
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Social Worker
- License
- 230707
- Practice address
- 4238 Washington St
Boston, MA 02131-2558 - Phone
- (508) 733-6319
- NPI assigned
- May 22, 2024
- 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 |
|---|---|---|---|---|
| Social Worker | 104100000X | 230707 | MA | Primary |
Addresses
Primary practice location
4238 Washington St
Boston, MA 02131-2558
Mailing address
1180 Beacon St Ste 7D
Brookline, MA 02446-3806
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 230707 | MA | MD | Social Worker |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1716336000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1777248000000",
"number": "1225877921",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1180 BEACON ST STE 7D",
"city": "BROOKLINE",
"state": "MA",
"postal_code": "024463806"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4238 WASHINGTON ST",
"city": "BOSTON",
"state": "MA",
"postal_code": "021312558",
"telephone_number": "508-733-6319"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SEPINUCK",
"first_name": "MARLEY",
"middle_name": "ALEXANDRA",
"name_prefix": "Ms.",
"credential": "MSW, LCSW",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2024-05-22",
"last_updated": "2026-04-27",
"certification_date": "2026-04-27",
"status": "A"
},
"taxonomies": [
{
"code": "104100000X",
"taxonomy_group": "",
"desc": "Social Worker",
"state": "MA",
"license": "230707",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Boston, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.