Mark Toyama, M.D.

Primary specialty

Surgery PhysicianTaxonomy code 208600000X

Practice address

676 N Saint Clair St
Suite 1525
Chicago, IL 60611-2927

Phone

(312) 255-1451

Fax

(312) 266-0478

NPI assigned

Sep 30, 2005

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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: No
• Medical equipment: Yes
• Home health: No
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Northwestern Surgical Associates

  • Surgery Physician
  • Chicago, IL
  • NPI 1225076706
  NPD
• Northwestern Surgical Associates

  • Surgery Physician
  • Chicago, IL
  • NPI 1750442893
  NPD

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

{
    "created_epoch": "1128038400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1821085358",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 388320",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606388320",
            "telephone_number": "773-767-8283",
            "fax_number": "773-767-8320"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "676 N SAINT CLAIR ST",
            "address_2": "SUITE 1525",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606112927",
            "telephone_number": "312-255-1451",
            "fax_number": "312-266-0478"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOYAMA",
        "first_name": "MARK",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-30",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "IL",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE SHIELD",
            "identifier": "01621690",
            "state": "IL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Stephanie Ann Townsend, APN
• Temperance Townsend
• Bonnie Toy
• Kathryn Toy
• Mia Toy, DDS
• Sewanu Anjolaoluwa Toyon
• Carla Tozer, NP
• Tolga Fikret Tozum, DDS, PHD
• Tpa Network Incorporated
• Tpa Network Incorporated

• Surgery Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Surgery 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.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.