Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Iwona Stefania Iwaszczyszyn, DDS
Dentist in Mt Prospect, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1922211507
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Registry record
Entity type Individual (Type 1)
Name Mrs. Iwona Stefania Iwaszczyszyn
Credential DDS
Sex Female
Practice address 259 E Rand Rd, # 110, Mt Prospect, IL, 60056
Phone (847) 890-4444
Enumeration date May 8, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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.
Frequently asked questions
Where does Iwona Iwaszczyszyn practice?
The practice location on file with NPPES is in Mt Prospect, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Iwona Iwaszczyszyn?
The National Provider Identifier (NPI) for Iwona Iwaszczyszyn is 1922211507, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.