DR. MARIA RENEA WILLIAMS APRN
NPI 1104784834
Nurse Practitioner - Psychiatric/Mental Health in Chicago, IL
About Dr. Maria Renea Williams Aprn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARIA RENEA WILLIAMS APRN (NPI 1104784834) is an individual psychiatric/mental health provider in Chicago, Illinois, licensed in Illinois (209033829) and active in the NPI registry since January 2026. She is enrolled in Medicare PECOS and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Maria Renea Williams Aprn is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Maria Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago Heights, IL 60411
- Reassigned Medicare billing, Illinois enrollment
- 173 clinicians in this Medicare group
Lanham, MD 20706
- Reassigned Medicare billing, Illinois enrollment
- 176 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60612
CHICAGO, IL 60612
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 Maria Williams's NPI number?
The NPI number for Maria Williams is 1104784834. It was assigned to this individual provider in the NPPES registry on January 12, 2026.
Where is Maria Williams located?
Maria Williams practices at 820 S Damen Ave, Chicago, IL 60612. The listed phone number is (618) 699-0313.
What is Maria Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Maria Williams enrolled in Medicare?
Yes. Maria Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Maria Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maria Williams reassigns Medicare benefits to 2 organizations: Altea Medical Illinois PLLC (Chicago Heights, IL) and Post Acute Medical PLLC (Lanham, MD). Each 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 Maria 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 Maria Williams was last updated on February 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Maria Renea Williams, APRN · NPI 1104784834
Psychiatric/Mental Health physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since January 12, 2026.
## Identity
- **NPI:** 1104784834 (Entity type: Individual)
- **Enumerated:** January 12, 2026
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** 209033829 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 820 S DAMEN AVE, Chicago, IL 60612-3728
- **Phone:** (618) 699-0313
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Altea Medical Illinois PLLC (NPI 1447039227, Chicago Heights, IL); Post Acute Medical PLLC (NPI 1730713025, Lanham, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** February 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1104784834) · Data from the CMS NPPES public registry.