Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Linda Mergenthaler
Counselor in Grayslake, IL · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1528562139
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Registry record
Entity type Individual (Type 1)
Name Linda Mergenthaler
Sex Female
Practice address 142 Hawley St Ste 5, Grayslake, IL, 60030
Phone (847) 549-2235
Enumeration date Mar 19, 2018
Last updated in NPPES Mar 19, 2018
Taxonomy & licenses
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
Is NPI 1528562139 active?
Yes, as of the latest NPPES snapshot, NPI 1528562139 is active (record last updated 2018-03-19).
How do I verify Linda Mergenthaler's NPI record?
Cross-check NPI 1528562139 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-19.