NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Hannah Margaret Dorff, LCSW

Clinical Social Worker in Griswold, CT · enumerated 2020.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1194346783

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mrs. Hannah Margaret Dorff
Credential LCSW
Sex Female
Practice address 226 E Main St, Griswold, CT, 06351
Phone (860) 822-2818
Enumeration date May 5, 2020
Last updated in NPPES Feb 21, 2023

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 12158 (CT) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Hannah Dorff practice?
The practice location on file with NPPES is in Griswold, CT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Hannah Dorff?
The National Provider Identifier (NPI) for Hannah Dorff is 1194346783, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-21.