DR. ADRIENNE A. WILLIAMS PH.D.
NPI 1659527877
Psychologist - Clinical in Baltimore, MD
About Dr. Adrienne A. Williams Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ADRIENNE A. WILLIAMS PH.D. (NPI 1659527877) is an individual clinical provider in Baltimore, Maryland, licensed in Maryland (04686) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of Duke University School Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses 5
Secondary Practice Location 1
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. Adrienne A. Williams Ph.d. 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 Reassignment
Medicare enrollment records show Adrienne Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chicago, IL 60621
- Reassigned Medicare billing, Illinois enrollment
- 2,127 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 21201 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.
BALTIMORE, MD 21201
BALTIMORE, MD 21201
BALTIMORE, MD 21201
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 Adrienne Williams's NPI number?
The NPI number for Adrienne Williams is 1659527877. It was assigned to this individual provider in the NPPES registry on August 8, 2008.
Where is Adrienne Williams located?
Adrienne Williams practices at 29 S Paca St Lower Level, Baltimore, MD 21201. The listed phone number is (410) 328-6802.
What is Adrienne Williams's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is Adrienne Williams enrolled in Medicare?
Yes. Adrienne 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 organization bills Medicare for Adrienne Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Adrienne Williams reassigns Medicare benefits to The Board Of Trustees Of The University Of Illinois (Chicago, 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 Adrienne 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 Adrienne Williams was last updated on February 17, 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. Adrienne A. Williams, PH.D. · NPI 1659527877
Clinical provider in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since August 8, 2008.
## Identity
- **NPI:** 1659527877 (Entity type: Individual)
- **Enumerated:** August 8, 2008
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **State license:** 04686 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 29 S PACA ST, LOWER LEVEL, Baltimore, MD 21201-1771
- **Phone:** (410) 328-6802
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** The Board Of Trustees Of The University Of Illinois (NPI 1427600345, Chicago, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Duke University School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** February 17, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1659527877) · Data from the CMS NPPES public registry.