NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Grenier, LADC

Addiction (Substance Use Disorder) Counselor in Norway, ME · enumerated 2010 · practices at Common Ground Counseling, LLC.

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

National Provider Identifier

1083917397

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Michael Grenier
Credential LADC
Sex Male
Practice address 235 Main St, Norway, ME, 04268
Phone (207) 739-2644
Fax (207) 739-2467
Enumeration date Dec 8, 2010
Last updated in NPPES Feb 12, 2015

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License LC5430 (ME) 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

Is NPI 1083917397 active?
Yes, as of the latest NPPES snapshot, NPI 1083917397 is active (record last updated 2015-02-12).
How do I verify Michael Grenier's NPI record?
Cross-check NPI 1083917397 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-12.