Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Krystyna Mastalerz
Massage Therapist in Grayslake, IL · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1548660657
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Registry record
Entity type Individual (Type 1)
Name Krystyna Mastalerz
Sex Female
Practice address 419 Center St, Grayslake, IL, 60030
Phone (847) 543-1055
Enumeration date Aug 26, 2014
Last updated in NPPES Aug 26, 2014
Taxonomy & licenses
225700000X Massage Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 227008792 (IL) Primary
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 Krystyna Mastalerz practice?
The practice location on file with NPPES is in Grayslake, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Krystyna Mastalerz?
The National Provider Identifier (NPI) for Krystyna Mastalerz is 1548660657, 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 2014-08-26.