Active NPI
Kenneth Robert Larsen, D.O
- Emergency Medicine Physician
- Warwick, RI
National Provider Identifier
1003894940
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Emergency Medicine Physician
- License
- 490
- Practice address
- 455 Toll Gate Rd
Warwick, RI 02886-2759 - Phone
- (401) 736-4289
- NPI assigned
- Dec 31, 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 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Emergency Medicine Physician | 207P00000X | 490 | RI | Primary |
| Emergency Medicine Physician | 207P00000X | 273 | CT |
Addresses
Primary practice location
455 Toll Gate Rd
Warwick, RI 02886-2759
Mailing address
382 Grindstone Hill Rd
North Stonington, CT 06359-1106
Phone (860) 599-1871
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Eligible to order & refer
- Part B services: No
- Medical equipment: Yes
- Home health: No
- Power mobility devices: Yes
- Hospice: No
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Osteopathy, Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 490 | RI | MD | Emergency Medicine Physician |
| 000273 | CT | MD | Occupational Therapy Assistant |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| DHHS, PHS, Naihs, Shiprock Hospital | Current | Accepting new patients | |
| The William W Backus Hospital | Current | Accepting new patients | |
| Hartford Healthcare Urgent Care Centers, LLC | Current | Accepting new patients | |
| DHHS, PHS, Naihs, Shiprock Hospital | Current | Accepting new patients | |
| Usacs of Connecticut, LLC | Emergency Medicine | Past | Accepting new patients |
| North Stonington Health Center, Inc | Past | Accepting new patients |
Locations
385 W Main St
Avon, CT 06001
Phone (860) 777-1280
326 Washington St
Norwich, CT 06360
Phone (860) 701-0140
Organizations & group practices 6
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- General Acute Care Hospital
- Teecnospos, AZ
- NPI 1477615789
-
- General Acute Care Hospital
- Shiprock, NM
- NPI 1780639971
-
- Urgent Care Clinic/Center
- Avon, CT
- NPI 1093239683
-
- General Acute Care Hospital
- Norwich, CT
- NPI 1639135718
-
- General Practice Physician
- North Stonington, CT
- NPI 1396050209
-
- Emergency Medicine Physician
- Bristol, CT
- NPI 1285713099
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1135987200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1003894940",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "382 GRINDSTONE HILL RD",
"city": "NORTH STONINGTON",
"state": "CT",
"postal_code": "063591106",
"telephone_number": "860-599-1871",
"fax_number": "860-599-6071"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "455 TOLL GATE RD",
"city": "WARWICK",
"state": "RI",
"postal_code": "028862759",
"telephone_number": "401-736-4289"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LARSEN",
"first_name": "KENNETH",
"middle_name": "ROBERT",
"credential": "D.O",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-12-31",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "RI",
"license": "490",
"primary": true
},
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "CT",
"license": "273",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Warwick, RI
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.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.