Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heather Duthler, LMSW, CAADC, CCS

Social Worker in Sparta, MI · enumerated 2015.

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

National Provider Identifier

1538551346

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Registry record

Entity type Individual (Type 1)

Name Heather Duthler

Credential LMSW, CAADC, CCS

Sex Female

Practice address 2111 12 Mile Rd Nw, Sparta, MI, 49345

Phone (616) 391-8470

Enumeration date Mar 3, 2015

Last updated in NPPES Jun 26, 2017

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 6801086697 (MI) Secondary

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 6801086697 (MI) Secondary

104100000X Social Worker Behavioral Health & Social Service Providers · License 6801086697 (MI) 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

How do I verify Heather Duthler's NPI record?

Cross-check NPI 1538551346 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1538551346 active?

Yes, as of the latest NPPES snapshot, NPI 1538551346 is active (record last updated 2017-06-26).

Other providers at this practice address

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Sharon Siefert Family Medicine Physician · Sparta, MI NPI 1598769242 James Ranta Family Medicine Physician · Sparta, MI NPI 1841294592 Brenda Zook Family Medicine Physician · Sparta, MI NPI 1467456103 Barry Kitts Family Medicine Physician · Sparta, MI NPI 1508860941 Mark Armstrong Family Medicine Physician · Sparta, MI NPI 1932104882 Wendy Muma Family Nurse Practitioner · Sparta, MI NPI 1720063654 David Bouwkamp Physician Assistant · Sparta, MI NPI 1982689733 Beverly Bond Nurse Practitioner · Sparta, MI NPI 1750537924

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-26.