Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Steven B Duley, MFT

Q: What is the NPI number for Steven Duley?

The National Provider Identifier (NPI) for Steven Duley is 1366566630, a Type 1 (individual) record in the CMS NPPES registry.

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

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

National Provider Identifier

1366566630

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Registry record

Entity type Individual (Type 1)

Name Mr. Steven B Duley

Credential MFT

Sex Male

Practice address 34 Murray Street, Family Services of Greater Waterbury, Waterbury, CT, 06710

Phone (203) 756-8317

Fax (203) 756-8310

Enumeration date Mar 19, 2007

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers 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

What is the NPI number for Steven Duley?

The National Provider Identifier (NPI) for Steven Duley is 1366566630, a Type 1 (individual) record in the CMS NPPES registry.

Where does Steven Duley practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.