NPPES file of Aug 9, 2026

Thaddeus

Thaddeus holds 2 active organization NPIs in the federal registry, with practice locations in 1 Illinois city. 1 list optometrist as their primary taxonomy; each location can bill under its own NPI.

CMS NPPES registry, file of Aug 9, 2026 · legal names grouped after punctuation and "LLC" are removed · method · Verify with CMS →

Which NPI is yours?

Search the organization with your city to find the NPI for the location you visit or bill.

Find a location's NPI

Chicago has the most NPIs, 2

  1. Chicago2

Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.

Most NPIs were issued in 2006 and 2007

Thaddeus NPIs by year issued2006: 1, 2007: 100.30.50.812006200711
Thaddeus NPIs by year issued2006: 1, 2007: 100.30.50.812006200711
Thaddeus NPIs by year issued2006: 1, 2007: 100.30.50.812006200711

Source: CMS NPPES, enumeration dates.

1 NPIs were issued in 2006 alone, more than in any other year.

Chicago locations

The city with the most Thaddeus NPIs. The full list of all 2 follows.

NPILocationPrimary taxonomyIssued
18311200054017 N MILWAUKEE AVE, ChicagoOptometristJul 6, 2006
13363319094812 N. MILWAUKEE, ChicagoEyewear SupplierAug 16, 2007
All 2 locations, by city
NPILocationPrimary taxonomyIssued
18311200054017 N MILWAUKEE AVE, ChicagoOptometristJul 6, 2006
13363319094812 N. MILWAUKEE, ChicagoEyewear SupplierAug 16, 2007

Related names

Checking an organization

  1. Match the NPI to the exact location you will visit or bill; each location can have its own.
  2. Confirm the business entity with the secretary of state.
  3. Check the HHS-OIG exclusion list for the organization and its owners.
  4. Verify each clinician you will see on their own record and with the state license search.

Common questions

Why does Thaddeus have 2 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Thaddeus's NPIs list practice locations in 1 city.

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.

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.