Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Justin Steffener, PSY.D.

Clinical Psychologist in Mill Creek, WA · enumerated 2010.

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

National Provider Identifier

1013218767

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Registry record

Entity type Individual (Type 1)

Name Dr. Justin Steffener

Credential PSY.D.

Sex Male

Practice address 15418 Main St, Mill Creek, WA, 98012

Phone (425) 339-5453

Fax (425) 225-8028

Enumeration date Nov 11, 2010

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License MC60197538 (WA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PY60447862 (WA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
2061671	Medicaid	WA	-

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Justin Steffener?

Justin Steffener is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.