Individual provider Active NPI

David Korsak

  • Optometrist
  • Chicago, IL
National Provider Identifier
1659940492
Registry record updated Jun 24, 2021
On this page

Key facts

NPPES NPI Registry
Primary specialty
OptometristTaxonomy code 152W00000X
License
046.011509 Issued in IL
Practice address
845 N Ashland Ave
Chicago, IL 60622-5149
Phone
(312) 942-0407
NPI assigned
Jun 24, 2021
Last updated
Jun 24, 2021By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 24, 2021

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Optometrist 152W00000X 046.011509 IL Primary

Addresses

Primary practice location

845 N Ashland Ave
Chicago, IL 60622-5149

Mailing address

845 N Ashland Ave
Chicago, IL 60622-5149
Phone (312) 942-0407

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: No
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20251003000757 IL Practitioner - Optometry 7214334333 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Optometry
Education
Illinois College of Optometry at Chicago, 2021
Medicare assignment
May accept Medicare assignment

Practice addresses (Care Compare)

19100 Ridgewood Pkwy
San Antonio, TX 78259-1828

2620 Goldenroad Lane
Glenview, IL 60026-0001

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
046.011509ILMDOptometrist

Practice roles

OrganizationSpecialtyStatusNew patients
Visionworks, Inc CurrentSince Sep 2, 2025 Accepting new patients
Visionworks, Inc. Optometrist CurrentSince Sep 2, 2025 Accepting new patients

Locations

239 Golf Mill Ctr
Ste 255
Niles, IL 60714
Phone (847) 297-2286

2422 US Highway 34
Oswego, IL 60543
Phone (630) 551-4133

19100 Ridgewood Pkwy
Bldg 1
San Antonio, TX 78259
Phone (726) 444-4069

Organizations & group practices 2

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1624492800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1624492800000",
    "number": "1659940492",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "845 N ASHLAND AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606225149",
            "telephone_number": "312-942-0407"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "845 N ASHLAND AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606225149",
            "telephone_number": "312-942-0407"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KORSAK",
        "first_name": "DAVID",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-06-24",
        "last_updated": "2021-06-24",
        "certification_date": "2021-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "IL",
            "license": "046.011509",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Chicago, IL

Sources for this page

Verify at the official NPI Registry.