Active NPI
Marial Williams
- Occupational Therapist
- Chicago, IL
National Provider Identifier
1245167923
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Occupational Therapist
- Practice address
- 700 W Fullerton Ave
Chicago, IL 60614-2600 - Phone
- (773) 364-1723
- NPI assigned
- May 6, 2026
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Occupational Therapist | 225X00000X | Primary |
Addresses
Primary practice location
700 W Fullerton Ave
Chicago, IL 60614-2600
Mailing address
101 Niles Ave
Lake Forest, IL 60045-2950
Phone (224) 383-7435
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in IL
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Occupational Therapist in Private Practice
- Education
- Other, 2021
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
500 W Jefferson St
Suite 2310
Louisville, KY 40202-2881
PO Box
Suite 69211
Baltimore, MD 21264
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
Organizations & group practices 1
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.
-
- Physical Therapist
- North Riverside, IL
- NPI 1699094102
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1778025600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1778025600000",
"number": "1245167923",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "101 NILES AVE",
"city": "LAKE FOREST",
"state": "IL",
"postal_code": "600452950",
"telephone_number": "224-383-7435"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "700 W FULLERTON AVE",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606142600",
"telephone_number": "773-364-1723"
}
],
"practiceLocations": [],
"basic": {
"last_name": "WILLIAMS",
"first_name": "MARIAL",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2026-05-06",
"last_updated": "2026-05-06",
"certification_date": "2026-05-06",
"status": "A"
},
"taxonomies": [
{
"code": "225X00000X",
"taxonomy_group": "",
"desc": "Occupational Therapist",
"state": null,
"license": null,
"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 May 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- 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.