Active NPI
Langdong Gradzewicz
- Adult Psychiatric/Mental Health Registered Nurse
- Meriden, CT
National Provider Identifier
1245196062
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Adult Psychiatric/Mental Health Registered Nurse
- License
- 134770
- Practice address
- 91 Eaton Ave
Meriden, CT 06451-2673 - Phone
- (203) 213-7498
- NPI assigned
- Dec 26, 2025
- Sex
- Unspecified or another gender identity
- 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 |
|---|---|---|---|---|
| Adult Psychiatric/Mental Health Registered Nurse | 163WP0809X | 134770 | CT | Primary |
Addresses
Primary practice location
91 Eaton Ave
Meriden, CT 06451-2673
Mailing address
91 Eaton Ave
Meriden, CT 06451-2673
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 |
|---|---|---|---|
| 134770 | CT | MD | Adult Psychiatric/Mental Health Registered Nurse |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1766707200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1766707200000",
"number": "1245196062",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "91 EATON AVE",
"city": "MERIDEN",
"state": "CT",
"postal_code": "064512673"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "91 EATON AVE",
"city": "MERIDEN",
"state": "CT",
"postal_code": "064512673",
"telephone_number": "203-213-7498"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GRADZEWICZ",
"first_name": "LANGDONG",
"sole_proprietor": "YES",
"sex": "X",
"enumeration_date": "2025-12-26",
"last_updated": "2025-12-26",
"certification_date": "2025-12-26",
"status": "A"
},
"taxonomies": [
{
"code": "163WP0809X",
"taxonomy_group": "193400000X SINGLE SPECIALTY GROUP",
"desc": "Registered Nurse, Psychiatric/Mental Health, Adult",
"state": "CT",
"license": "134770",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Meriden, CT
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 26, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.