William Charles Toepper, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

Practice address

836 W Wellington Ave
Chicago, IL 60657-5147

Phone

(773) 296-7054

NPI assigned

May 31, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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.

• Advocate North Side Health Network

  dba Advocate Illinois Masonic Physician Group

  • Clinic/Center
  • Chicago, IL
  • NPI 1780788323
  NPD (past)
• Central Dupage Emergency Physicians, PC

  • Emergency Medicine Physician
  • Winfield, IL
  • NPI 1619074028
  NPD (past)

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

{
    "created_epoch": "1149033600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1205873106",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "204 W SAINT PAUL AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606145712",
            "telephone_number": "312-337-8352"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "836 W WELLINGTON AVE",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606575147",
            "telephone_number": "773-296-7054"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOEPPER",
        "first_name": "WILLIAM",
        "middle_name": "CHARLES",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-31",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Irena Todorova
• Mariya N Todorova
• Hadi Toeg, MD, MSC, MPH
• Christine Toelke
• Sachi Lian Toepp
• David Tofovic, M.D.
• Emily Tofovic, MD
• Petar Tofovic, D.M.D
• Daniel Toft, MD, PHD
• Together Women's Health Medical Group of Illinois, PLLC

• Emergency Medicine Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Emergency Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.