Dr. Mark James Prosniewski, DDS

Dr. Mark James Prosniewski is a General Practice Dentistry provider (Dentist) practicing in Bartlett, IL, registered in the NPPES registry with NPI 1760572861 since 2006. The credential DDS stands for Doctor of Dental Surgery.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1760572861
Entity type	Individual (Type 1)
Name	Dr. Mark James Prosniewski
Credential	DDS
Sex	Male
Practice address	Bartlett, IL, 60103
Phone	6308372779
Fax	6308372708
Enumeration date	2006-10-13
Last updated in NPPES	2013-03-12

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	019018332	IL

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

Copy-ready billing details

Provider: Mark Prosniewski, DDS
NPI: 1760572861
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: Bartlett, IL, 60103

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1205405685	William Prosniewski	Individual	General Practice Dentistry	Bartlett, IL

Verify this record

Cross-check NPI 1760572861 against the authoritative CMS record: view Dr. Mark James Prosniewski on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Where does Mark Prosniewski practice?

The practice location on file with NPPES is in Bartlett, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mark Prosniewski?

The National Provider Identifier (NPI) for Mark Prosniewski is 1760572861, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-03-12.