Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Leo Joseph Thompson, MD
Neurology Physician in Chicago, IL · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437817137
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Registry record
Entity type Individual (Type 1)
Name Leo Joseph Thompson
Credential MD
Sex Male
Practice address 1801 W Taylor St Ste 4e, Chicago, IL, 60612
Phone (312) 996-2933
Enumeration date Nov 30, 2021
Last updated in NPPES Jun 11, 2025
Taxonomy & licenses
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 125.086543 (IL) Primary
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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Leo Thompson?
Leo Thompson is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-11.