Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Gordon-Tarnowski, AA

Counselor in Seattle, WA · enumerated 2017.

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

National Provider Identifier

1255842985

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Registry record

Entity type Individual (Type 1)

Name Michael Gordon-Tarnowski

Credential AA

Sex Male

Practice address 222 Wall St Ste 100, Seattle, WA, 98121

Phone (206) 441-3043

Enumeration date Oct 20, 2017

Last updated in NPPES Apr 25, 2019

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers Secondary

101Y00000X Counselor Behavioral Health & Social Service Providers · License CG60959212 (WA) 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 1255842985 active?

Yes, as of the latest NPPES snapshot, NPI 1255842985 is active (record last updated 2019-04-25).

How do I verify Michael Gordon-Tarnowski's NPI record?

Cross-check NPI 1255842985 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-25.