Individual provider Active NPI

Margaret Gillian Ziegenfuss

  • Physical Therapist
  • Chicago, IL
National Provider Identifier
1881529592
Registry record updated Jun 15, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physical TherapistTaxonomy code 225100000X
License
070.026421 Issued in IL
Practice address
836 W Wellington Ave
Chicago, IL 60657-5147
Phone
(773) 975-1600
NPI assigned
Jun 15, 2026
Last updated
Jun 15, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 15, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Physical Therapist 225100000X 070.026421 IL Primary

Addresses

Primary practice location

836 W Wellington Ave
Chicago, IL 60657-5147

Mailing address

426 W Briar PL Apt 5G
Chicago, IL 60657-4702

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

NPI Registry JSON

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

{
    "created_epoch": "1781481600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781481600000",
    "number": "1881529592",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "426 W BRIAR PL APT 5G",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606574702"
        },
        {
            "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": "773-975-1600"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZIEGENFUSS",
        "first_name": "MARGARET",
        "middle_name": "GILLIAN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-06-15",
        "last_updated": "2026-06-15",
        "certification_date": "2026-06-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "225100000X",
            "taxonomy_group": "",
            "desc": "Physical Therapist",
            "state": "IL",
            "license": "070.026421",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Chicago, IL

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 15, 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.