Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John N Diaconou MD Ps

Q: What type of organization is John N Diaconou MD Ps?

John N Diaconou MD Ps is registered in NPPES as a Specialist (its primary provider taxonomy).

Specialist in Federal Way, WA · enumerated 2008 · authorized official Marilyne Tweit, Clinic Manager.

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

National Provider Identifier

1760657142

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Registry record

Entity type Organization (Type 2)

Legal business name John N Diaconou MD Ps

Practice address 34509 9th Ave S, Suite 102, Federal Way, WA, 98003

Phone (253) 833-8032

Enumeration date Apr 25, 2008

Last updated in NPPES May 2, 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
D522	Other	WA	REGENCE BLUE SHIELD
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.

Read the full guide → Validate an NPI →

Frequently asked questions

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.

What type of organization is John N Diaconou MD Ps?

John N Diaconou MD Ps is registered in NPPES as a Specialist (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-02.