OrganizationActive
Leon J. Kosek, O.D.
NPI 1407975782 · Optometrist · Frankfort, IL
Provider details
- NPI number
- 1407975782
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Leon Kosek, Owner(815) 469-8541
- License
- 046007472 (IL)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(89/100 index)
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
600 Bankview Dr
Frankfort, IL 60423-1489
Phone: (815) 469-8541
Fax: (815) 469-8126
Street-level locationGet directions
Mailing address
600 Bankview Dr
Frankfort, IL 60423-1489
Registry dates
- Enumerated
- 2007-03-28
- Last updated
- 2009-12-31
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.