Active NPI
Gunsagar Singh Gulati, MD, PHD
- Medical Oncology Physician
- Boston, MA
National Provider Identifier
1477139905
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Medical Oncology Physician
- License
- 1025029
- Practice address
- 450 Brookline Ave
Boston, MA 02215-5450 - Phone
- (617) 632-6476
- NPI assigned
- Mar 23, 2021
- 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 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Medical Oncology Physician | 207RX0202X | 1025029 | MA | Primary |
| Internal Medicine Physician | 207R00000X | 1025029 | MA |
Addresses
Primary practice location
450 Brookline Ave
Boston, MA 02215-5450
Mailing address
450 Brookline Ave
Boston, MA 02215-5450
Phone (617) 632-3476
Other practice location 1
75 Francis St
Boston, MA 02115-6106
Phone (617) 732-5775
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20210419000950 | MA | Order and Referring Only - Internal Medicine | 5698183382 |
Care Compare profile
Medicare Care Compare- Specialty
- Medical Oncology
- Education
- Other, 2021
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
Practice addresses (Care Compare)
450 Brookline Ave
Boston, MA 02215-5450
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine, Doctor of Philosophy
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1616457600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783468800000",
"number": "1477139905",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "450 BROOKLINE AVE",
"city": "BOSTON",
"state": "MA",
"postal_code": "022155450",
"telephone_number": "617-632-3476"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "450 BROOKLINE AVE",
"city": "BOSTON",
"state": "MA",
"postal_code": "022155450",
"telephone_number": "617-632-6476"
}
],
"practiceLocations": [
{
"address_1": "75 Francis St",
"address_purpose": "LOCATION",
"city": "Boston",
"state": "MA",
"postal_code": "021156106",
"country_code": "US",
"telephone_number": "617-732-5775",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "GULATI",
"first_name": "GUNSAGAR",
"middle_name": "SINGH",
"credential": "MD, PHD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2021-03-23",
"last_updated": "2026-07-08",
"certification_date": "2026-07-08",
"status": "A"
},
"taxonomies": [
{
"code": "207RX0202X",
"taxonomy_group": "",
"desc": "Internal Medicine, Medical Oncology",
"state": "MA",
"license": "1025029",
"primary": true
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "MA",
"license": "1025029",
"primary": false
}
],
"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 8, 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.