Thaddeus, Ltd
NPI 1831120005 · Optometrist · Chicago, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thaddeus, Ltd is a Optometrist organization in Chicago, IL (NPI 1831120005).
Provider details
- NPI number
- 1831120005
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Spencer Vidulich, Owner Doctor(773) 327-3000
- License
- 060-0005772 (IL)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Pearle Vision
Registry dates
- Enumerated
- 2006-07-06
- Last updated
- 2009-11-12
Frequently asked questions
- What is Thaddeus, Ltd's NPI number?
- Thaddeus, Ltd's National Provider Identifier (NPI) is 1831120005, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Thaddeus, Ltd?
- Thaddeus, Ltd is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Thaddeus, Ltd located?
- Thaddeus, Ltd's practice location on file with NPPES is 4017 N Milwaukee Ave, Chicago, IL 60641-1834.
- What is Thaddeus, Ltd's phone number?
- The practice phone number listed in the NPPES registry for Thaddeus, Ltd is (773) 545-2660.
- Does Thaddeus, Ltd accept Medicare?
- Thaddeus, Ltd is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Thaddeus, Ltd?
- The authorized official listed on Thaddeus, Ltd's NPPES record is Spencer Vidulich, Owner Doctor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Thaddeus, Ltd's NPI active?
- Yes — Thaddeus, Ltd's NPI (1831120005) is active in the NPPES registry as of the last update on 2009-11-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.