MARIAL WILLIAMS
NPI 1245167923
Occupational Therapist in Chicago, IL
About Marial Williams NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIAL WILLIAMS (NPI 1245167923) is an individual occupational therapist in Chicago, Illinois and active in the NPI registry since May 2026. She is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Marial Williams is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marial Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
North Riverside, IL 60546
- Reassigned Medicare billing, Illinois enrollment
- 440 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marial Williams's NPI number?
The NPI number for Marial Williams is 1245167923. It was assigned to this individual provider in the NPPES registry on May 6, 2026.
Where is Marial Williams located?
Marial Williams practices at 700 W Fullerton Ave, Chicago, IL 60614. The listed phone number is (773) 364-1723.
What is Marial Williams's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Marial Williams enrolled in Medicare?
Yes. Marial Williams is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marial Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marial Williams reassigns Medicare benefits to Comprehensive Therapeutics Ltd (North Riverside, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marial Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Marial Williams was last updated on May 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.