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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

WILLIAM DAVID FEATHERSTONE
NPI 1295640647
Counselor - Addiction (Substance Use Disorder) in Corvallis, MT

Active since August 18, 2026
1020 MAIN ST, BOX 702, CORVALLIS, MT 59828(406) 361-0110 Get Directions Write a Review

NPPES record added: August 18, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About William David Featherstone NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM DAVID FEATHERSTONE (NPI 1295640647) is an individual addiction (substance use disorder) provider in Corvallis, Montana, licensed in Montana (BBH-ACLC-LIC-90258) and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1295640647
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameWILLIAM DAVID FEATHERSTONE
Location Address1020 MAIN ST, BOX 702Corvallis, MT 59828-8514
Mailing Address1020 Main St, Box 702Corvallis, MT 59828-8514 · (406) 361-0110
Phone(406) 361-0110
Sole ProprietorNo
Enumeration DateAugust 18, 2026
NPPES CertifiedAugust 18, 2026
✔ NPI 1295640647 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in MT · BBH-ACLC-LIC-90258
1020 MAIN ST, Corvallis, MT 59828
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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Featherstone's NPI number?

The NPI number for William Featherstone is 1295640647. It was assigned to this individual provider in the NPPES registry on August 18, 2026.

Where is William Featherstone located?

William Featherstone practices at 1020 Main St Box 702, Corvallis, MT 59828. The listed phone number is (406) 361-0110.

What is William Featherstone's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for William Featherstone was last updated on August 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.