Clarence Stephen Denis, OD

Primary specialty

OptometristTaxonomy code 152W00000X

License

46011839 Issued in IL

Practice address

3500 W Peterson Ave Ste 401
Chicago, IL 60659-3307

Phone

(773) 588-3090

NPI assigned

Nov 14, 2023

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in IN, IL2 enrollments

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 2

Specialty

Optometry

Education

Midwestern University College of Dental Medicine, Downers Grove, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Charles S Ovitsky PCGroup PAC ID 7012175102, 14 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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

• Charles S Ovitsky PC

  • Optometrist
  • Chicago, IL
  • NPI 1568647220
  Medicare reassignment Care Compare group NPD
• Ovitsky Vision Care of Indiana PC

  • Optometrist
  • Indianapolis, IN
  • NPI 1831694330
  Medicare reassignment NPD

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

{
    "created_epoch": "1699920000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759190400000",
    "number": "1427822014",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3500 W PETERSON AVE STE 401",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606593307",
            "telephone_number": "773-588-3090"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3500 W PETERSON AVE STE 401",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606593307",
            "telephone_number": "773-588-3090"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DENIS",
        "first_name": "CLARENCE",
        "middle_name": "STEPHEN",
        "name_prefix": "Dr.",
        "credential": "OD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2023-11-14",
        "last_updated": "2025-09-30",
        "certification_date": "2025-09-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "IN",
            "license": "18004459A",
            "primary": false
        },
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "FL",
            "license": "OPC6780",
            "primary": false
        },
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "IL",
            "license": "46011839",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Han Deng, MD
• George Dengler, DO
• Connie Denham
• Alexandra Denis, LCSW, PLLC
• Alisha M Denis, LCSW
• Kaylah Denis
• Liz M Denis, PA-C
• Sareena M Denis, OTD, OTR/L
• Denise Bennett, LLC
• Denise J Petenzi, DPM, LLC

• Optometrist in Chicago, IL
• Providers in Chicago, IL by specialty
• Optometrist in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 30, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.