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John N Diaconou MD

Specialist in Auburn, WA · enumerated 2007 · authorized official Marilyne Tweit, Clinic Manager.

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

National Provider Identifier

1427266733

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Registry record

Entity type Organization (Type 2)
Legal business name John N Diaconou MD
Practice address 202 N Division St, Suite 402, Auburn, WA, 98001
Phone (253) 833-8032
Fax (253) 833-8081
Enumeration date May 18, 2007
Last updated in NPPES Feb 19, 2008

Taxonomy & classification

174400000X Specialist Other Service Providers · License MD00018742 (WA) Primary

Authorized official

Name Marilyne Tweit
Title Clinic Manager
Phone (253) 833-8032

Other identifiers

Identifier Type State Issuer
1779008 Medicaid WA -
0152713 Other WA LABOR AND INDUSTRIES

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

What type of organization is John N Diaconou MD?
John N Diaconou MD is registered in NPPES as a Specialist (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-19.