Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Timothy J Derwin, BS

Addiction (Substance Use Disorder) Counselor in Munising, MI · enumerated 2009 · practices at Sault Tribe of Chippewa Indians.

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

National Provider Identifier

1841431814

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Registry record

Entity type Individual (Type 1)

Name Timothy J Derwin

Credential BS

Sex Male

Practice address 622 W Superior St, Munising, MI, 49862

Phone (906) 387-4721

Fax (906) 387-4727

Enumeration date Mar 20, 2009

Last updated in NPPES Mar 20, 2009

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor 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.

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Frequently asked questions

How do I verify Timothy Derwin's NPI record?

Cross-check NPI 1841431814 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1841431814 active?

Yes, as of the latest NPPES snapshot, NPI 1841431814 is active (record last updated 2009-03-20).

Other providers at this practice address

Browse all →

Amy Westcomb Physician Assistant · Munising, MI NPI 1457448920 Sault Tribe of Chippewa Indians Federally Qualified Health Center (FQHC) · Munising, MI NPI 1780737403 Candace Worthington Clinical Social Worker · Munising, MI NPI 1386780674

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-03-20.