Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark A Kolozenski, DDS, MS

Periodontics in Orland Park, IL · enumerated 2007.

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

National Provider Identifier

1831316157

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A Kolozenski

Credential DDS, MS

Sex Male

Practice address 14654 Hollow Tree Rd, Orland Park, IL, 60462

Phone (708) 220-6640

Enumeration date Apr 19, 2007

Last updated in NPPES May 20, 2014

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License 021001669 (IL) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

Is NPI 1831316157 active?

Yes, as of the latest NPPES snapshot, NPI 1831316157 is active (record last updated 2014-05-20).

How do I verify Mark Kolozenski's NPI record?

Cross-check NPI 1831316157 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-20.