Active NPI
Robert Shannon, MD
- Specialist
- Chelmsford, MA
National Provider Identifier
1235130485
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Specialist
- License
- 38329
- Practice address
- 3 Meeting House Rd
Chelmsford, MA 01824-2738 - Phone
- (978) 256-1858
- Fax
- (978) 156-9679
- NPI assigned
- Aug 9, 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Specialist | 174400000X | 38329 | MA | Primary |
Addresses
Primary practice location
3 Meeting House Rd
Chelmsford, MA 01824-2738
Mailing address
3 Meeting House Rd
Chelmsford, MA 01824-2738
Phone (978) 256-1858
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 |
|---|---|---|---|
| 38329 | MA | MD | Specialist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1123545600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1235130485",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3 MEETING HOUSE RD",
"city": "CHELMSFORD",
"state": "MA",
"postal_code": "018242738",
"telephone_number": "978-256-1858",
"fax_number": "978-156-9679"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3 MEETING HOUSE RD",
"city": "CHELMSFORD",
"state": "MA",
"postal_code": "018242738",
"telephone_number": "978-256-1858",
"fax_number": "978-156-9679"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SHANNON",
"first_name": "ROBERT",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-08-09",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "174400000X",
"taxonomy_group": "",
"desc": "Specialist",
"state": "MA",
"license": "38329",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Chelmsford, 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.