Active NPI
Virginia Marie Zaleskas, M.D.
- Hematology & Oncology Physician
- Boston, MA
National Provider Identifier
1538130133
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Hematology & Oncology Physician
- License
- 204551
- Practice address
- 750 Washington St
Box 245
Boston, MA 02111-1526 - Phone
- (617) 636-1108
- Fax
- (617) 636-6004
- NPI assigned
- Jan 31, 2006
- Last updated
- Jul 13, 2026
- 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 |
|---|---|---|---|---|
| Hematology & Oncology Physician | 207RH0003X | 204551 | MA | Primary |
Addresses
Primary practice location
750 Washington St
Box 245
Boston, MA 02111-1526
Mailing address
254 Bowen St
Apt 1
South Boston, MA 02127-2646
Phone (617) 269-9134
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 204551 | MA | MD | Hematology & Oncology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Emerson Hospital | Past | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- General Acute Care Hospital
- Concord, MA
- NPI 1922103357
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1138665600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1538130133",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "254 BOWEN ST",
"address_2": "APT 1",
"city": "SOUTH BOSTON",
"state": "MA",
"postal_code": "021272646",
"telephone_number": "617-269-9134"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "750 WASHINGTON ST",
"address_2": "BOX 245",
"city": "BOSTON",
"state": "MA",
"postal_code": "021111526",
"telephone_number": "617-636-1108",
"fax_number": "617-636-6004"
}
],
"practiceLocations": [],
"basic": {
"last_name": "ZALESKAS",
"first_name": "VIRGINIA",
"middle_name": "MARIE",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2006-01-31",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207RH0003X",
"taxonomy_group": "",
"desc": "Internal Medicine, Hematology & Oncology",
"state": "MA",
"license": "204551",
"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 Jul 13, 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.