NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen P. Marceau, CASAC

Addiction (Substance Use Disorder) Counselor in Malone, NY · enumerated 2006 · practices at Citizens Advocates Inc..

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

National Provider Identifier

1629137955

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Stephen P. Marceau
Credential CASAC
Sex Male
Practice address 209 Park St., Citizen Advocates, Malone, NY, 12953
Fax (518) 483-4830
Enumeration date Dec 6, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License NY 4525 (NY) 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 1629137955 active?
Yes, as of the latest NPPES snapshot, NPI 1629137955 is active (record last updated 2007-07-08).
How do I verify Stephen Marceau's NPI record?
Cross-check NPI 1629137955 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 2007-07-08.