Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Steven Sliwinski, Phd, P.C.

Q: What type of organization is Steven Sliwinski, Phd, P.C.?

Steven Sliwinski, Phd, P.C. is registered in NPPES as a Counseling Psychologist (its primary provider taxonomy).

Counseling Psychologist in Plano, TX · enumerated 2007 · authorized official Steven Sliwinski, Psychologist.

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

National Provider Identifier

1134310907

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Registry record

Entity type Organization (Type 2)

Legal business name Steven Sliwinski, Phd, P.C.

Practice address 903 18th St Ste 117, Plano, TX, 75074

Phone (972) 424-9212

Fax (972) 509-1450

Enumeration date Aug 7, 2007

Last updated in NPPES Aug 7, 2007

Taxonomy & classification

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 31440 (TX) Primary

Authorized official

Name Steven Sliwinski

Title Psychologist

Phone (972) 424-9212

Other identifiers

Identifier	Type	State	Issuer
31440	Other	TX	TEXAS LICENSE
0064KM	Other	TX	BLUE CROSS

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 type of organization is Steven Sliwinski, Phd, P.C.?

Steven Sliwinski, Phd, P.C. is registered in NPPES as a Counseling Psychologist (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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-07.