Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Dianne Bernadette Sullivan, MED LMFT

Marriage & Family Therapist in Harford, CT · enumerated 2007.

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

National Provider Identifier

1497960603

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Registry record

Entity type Individual (Type 1)

Name Mrs. Dianne Bernadette Sullivan

Credential MED LMFT

Sex Female

Practice address 714 Prospect Avenue, Harford, CT, 06105

Phone (860) 586-8800

Fax (860) 570-0886

Enumeration date May 11, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 000497 (CT) Primary

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 Dianne Sullivan practice?

The practice location on file with NPPES is in Harford, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Dianne Sullivan?

The National Provider Identifier (NPI) for Dianne Sullivan is 1497960603, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.