Active NPI
Nan Lan, MD
- Gastroenterology Physician
- Boston, MA
National Provider Identifier
1730642844
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Gastroenterology Physician
- License
- 1027413
- Practice address
- 75 Francis St
Boston, MA 02115-6106 - Phone
- (617) 732-6389
- NPI assigned
- Apr 8, 2019
- 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 |
|---|---|---|---|---|
| Gastroenterology Physician | 207RG0100X | 1027413 | MA | Primary |
Addresses
Primary practice location
75 Francis St
Boston, MA 02115-6106
Mailing address
75 Francis St
Boston, MA 02115-6106
Other practice location 1
55 Fruit St
Boston, MA 02114-2621
Phone (617) 732-6389
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in OH
- 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 |
|---|---|---|---|---|
| I20211018002512 | OH | Order and Referring Only - Internal Medicine | 4789082066 |
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": "1554681600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1786406400000",
"number": "1730642844",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "75 FRANCIS ST",
"city": "BOSTON",
"state": "MA",
"postal_code": "021156106"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "75 FRANCIS ST",
"city": "BOSTON",
"state": "MA",
"postal_code": "021156106",
"telephone_number": "617-732-6389"
}
],
"practiceLocations": [
{
"address_1": "55 Fruit St",
"address_purpose": "LOCATION",
"city": "Boston",
"state": "MA",
"postal_code": "021142621",
"country_code": "US",
"telephone_number": "617-732-6389",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "LAN",
"first_name": "NAN",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2019-04-08",
"last_updated": "2026-08-11",
"certification_date": "2026-08-11",
"status": "A"
},
"taxonomies": [
{
"code": "207RG0100X",
"taxonomy_group": "",
"desc": "Internal Medicine, Gastroenterology",
"state": "MA",
"license": "1027413",
"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 Aug 11, 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.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.