Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Glasses on Oak St

Eyewear Supplier in Chicago, IL · enumerated 2020 · authorized official Carly Szafranski, Doctor.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1710512488

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Registry record

Entity type Organization (Type 2)

Legal business name Glasses on Oak St

Practice address 900 N Michigan Ave Fl 5, Chicago, IL, 60611

Phone (312) 751-0073

Fax (312) 751-0129

Enumeration date Mar 3, 2020

Last updated in NPPES Mar 3, 2020

Taxonomy & classification

332H00000X Eyewear Supplier Suppliers Primary

Authorized official

Name Carly Szafranski

Title Doctor

Phone (312) 751-0073

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Glasses on Oak St located?

The practice location on file with NPPES is in Chicago, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-03-03. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-03-03.