Active NPI
Tierney Magill Kristoff
- Dentist
- Norwalk, CT
National Provider Identifier
1003506478
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dentist
- License
- 13958
- Practice address
- 652 Main Ave
Norwalk, CT 06851-1189 - Phone
- (203) 854-5458
- NPI assigned
- May 10, 2023
- Sex
- Female
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Dentist | 122300000X | 13958 | CT | Primary |
Addresses
Primary practice location
652 Main Ave
Norwalk, CT 06851-1189
Mailing address
219 Bennetts Farm Rd
Ridgefield, CT 06877-1522
Phone (847) 764-9391
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)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 13958 | CT | MD | Dentist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1683676800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1787702400000",
"number": "1003506478",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "219 BENNETTS FARM RD",
"city": "RIDGEFIELD",
"state": "CT",
"postal_code": "068771522",
"telephone_number": "847-764-9391"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "652 MAIN AVE",
"city": "NORWALK",
"state": "CT",
"postal_code": "068511189",
"telephone_number": "203-854-5458"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KRISTOFF",
"first_name": "TIERNEY",
"middle_name": "MAGILL",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2023-05-10",
"last_updated": "2026-08-26",
"certification_date": "2026-08-26",
"status": "A"
},
"taxonomies": [
{
"code": "122300000X",
"taxonomy_group": "",
"desc": "Dentist",
"state": "CT",
"license": "13958",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Norwalk, CT
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 26, 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.