Thaddeus in Chicago, IL
This location of Thaddeus bills under NPI 1336331909, an organization record issued on Aug 16, 2007 with the primary taxonomy Eyewear Supplier. It is one of 2 NPIs registered under this name and one of 2 in Chicago; each clinician who sees you there has their own NPI and license.
Organization recordNPPES, Aug 2026
1336331909
- Legal name
- Thaddeus
- Entity
- Type 2 · organization
- Primary taxonomy
- Eyewear Supplier 332H00000X
- Practice location
- 4812 N. MILWAUKEE, Chicago, IL 60646
- Phone
- 773-545-2660
- Enumerated
- Aug 16, 2007
- Record updated
- Oct 4, 2007
- Authorized official
- Owner (title as filed)
The other Chicago NPI
- Thaddeus, LTD4017 N MILWAUKEE AVE · issued Jul 6, 20061831120005
Checking an organization
- Confirm the business with the Illinois secretary of state.
- Check the HHS-OIG exclusion list for the organization.
- Verify each clinician on their own record and the state license search.
Common questions
Is an organization NPI a license?
No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.
Which Chicago NPI should I use?
Ask the office which NPI it bills under; all 2 Chicago NPIs are registered under the same name.
Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.