NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

James Malinowski DDS. David Sefcik DDS. Ltd

General Practice Dentistry in Joliet, IL · enumerated 2006 · authorized official James Malinowski, Treasurer.

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

National Provider Identifier

1679595243

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name James Malinowski DDS. David Sefcik DDS. Ltd
Practice address 903 129th Infantry Dr, Suite 100, Joliet, IL, 60435
Phone (815) 725-1605
Enumeration date Jul 24, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers Primary

Authorized official

Name James Malinowski
Title Treasurer
Phone (815) 725-1605

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

Who is the authorized official for James Malinowski DDS. David Sefcik DDS. Ltd?
NPPES lists James Malinowski (Treasurer) as the authorized official for this organization.
What is the NPI number for James Malinowski DDS. David Sefcik DDS. Ltd?
The NPI for James Malinowski DDS. David Sefcik DDS. Ltd is 1679595243, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.