Active NPI
John W Graef, M.D.
- Pediatric Medical Toxicology Physician
- Boston, MA
National Provider Identifier
1982680575
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Pediatric Medical Toxicology Physician
- License
- 33948
- Practice address
- 333 Longwood Ave
Boston, MA 02115-5711 - Phone
- (617) 355-8263
- Fax
- (617) 277-8934
- NPI assigned
- Dec 16, 2005
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Pediatrics Physician | 208000000X | 33948 | MA | |
| Pediatric Medical Toxicology Physician | 2080T0002X | 33948 | MA | Primary |
| Hospitalist Physician | 208M00000X | 33948 | MA |
Addresses
Primary practice location
333 Longwood Ave
Boston, MA 02115-5711
Mailing address
147 Milk Street
Provider Enrollment - 9TH Floor
Boston, MA 02109-4862
Phone (617) 559-8053
Other identifiers 6
| Identifier | Type | State | Issuer |
|---|---|---|---|
| V02406 | Other | MA | BLUE CROSS |
| PP624 | Other | MA | HARVARD PILGRIM |
| 0003908 | Other | MA | NEIGHBORHOOD HEALTH |
| 2020785 | Medicaid | MA | |
| 4147717-003 | Other | MA | CIGNA |
| 715698 | Other | MA | TUFTS |
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
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1134691200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1982680575",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "147 MILK STREET",
"address_2": "PROVIDER ENROLLMENT - 9TH FLOOR",
"city": "BOSTON",
"state": "MA",
"postal_code": "021094862",
"telephone_number": "617-559-8053",
"fax_number": "617-421-3487"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "333 LONGWOOD AVE",
"city": "BOSTON",
"state": "MA",
"postal_code": "021155711",
"telephone_number": "617-355-8263",
"fax_number": "617-277-8934"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GRAEF",
"first_name": "JOHN",
"middle_name": "W",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-12-16",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "208000000X",
"taxonomy_group": "",
"desc": "Pediatrics",
"state": "MA",
"license": "33948",
"primary": false
},
{
"code": "2080T0002X",
"taxonomy_group": "",
"desc": "Pediatrics, Medical Toxicology",
"state": "MA",
"license": "33948",
"primary": true
},
{
"code": "208M00000X",
"taxonomy_group": "",
"desc": "Hospitalist",
"state": "MA",
"license": "33948",
"primary": false
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "BLUE CROSS",
"identifier": "V02406",
"state": "MA"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "HARVARD PILGRIM",
"identifier": "PP624",
"state": "MA"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "NEIGHBORHOOD HEALTH",
"identifier": "0003908",
"state": "MA"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "2020785",
"state": "MA"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "CIGNA",
"identifier": "4147717-003",
"state": "MA"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "TUFTS",
"identifier": "715698",
"state": "MA"
}
],
"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.