Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Hilliard E Slavick, MD
Neurology Physician in Chicago, IL · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1215935523
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Registry record
Entity type Individual (Type 1)
Name Dr. Hilliard E Slavick
Credential MD
Sex Male
Practice address 331 W Surf St Ste 6400, Chicago, IL, 60657
Phone (312) 332-2226
Enumeration date Jul 11, 2005
Last updated in NPPES Mar 26, 2021
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD 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
Is NPI 1215935523 active?
Yes, as of the latest NPPES snapshot, NPI 1215935523 is active (record last updated 2021-03-26).
How do I verify Hilliard Slavick's NPI record?
Cross-check NPI 1215935523 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
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-26.