Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Christopher Simpson
Behavior Analyst in Chicago, IL · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861211799
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Registry record
Entity type Individual (Type 1)
Name Christopher Simpson
Sex Male
Practice address 2121 N Clybourn Ave, Chicago, IL, 60614
Phone (773) 902-0360
Enumeration date Oct 8, 2024
Last updated in NPPES Oct 8, 2024
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License BACB750193 (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
Is NPI 1861211799 active?
Yes, as of the latest NPPES snapshot, NPI 1861211799 is active (record last updated 2024-10-08).
How do I verify Christopher Simpson's NPI record?
Cross-check NPI 1861211799 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 → Salvi Shuaipaj Behavior Analyst · Chicago, IL NPI 1376269647 Samantha Rusnak Behavior Analyst · Chicago, IL NPI 1790542553 Emily Homrighausen Speech-Language Pathologist · Chicago, IL NPI 1205661881 Anna Spirtas Speech-Language Pathologist · Chicago, IL NPI 1346196029 Lauren Erazmus Behavior Analyst · Chicago, IL NPI 1699698068 Amber Creasey Behavior Analyst · Chicago, IL NPI 1689588584
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-08.