Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Darlene M Duff, Lcmhc

Mental Health Counselor in Montpelier, VT · enumerated 2021 · authorized official Darlene Duff, Provider.

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

National Provider Identifier

1275203002

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Registry record

Entity type Organization (Type 2)

Legal business name Darlene M Duff, Lcmhc

Practice address 18 Loomis St Apt 5, Montpelier, VT, 05602

Phone (802) 595-9490

Enumeration date Sep 14, 2021

Last updated in NPPES Oct 5, 2021

Taxonomy & classification

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary

Authorized official

Name Darlene Duff

Title Provider

Phone (802) 595-9490

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 is Darlene M Duff, Lcmhc located?

The practice location on file with NPPES is in Montpelier, VT.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-10-05. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-05.