DR. TRACY J WILLIAMS PH,D., BCBA
NPI 1114180064
Psychologist - Cognitive & Behavioral in Sioux Falls, SD
About Dr. Tracy J Williams Ph,d., Bcba NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TRACY J WILLIAMS PH,D., BCBA (NPI 1114180064) is an individual cognitive & behavioral provider in Sioux Falls, South Dakota and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, maintains 6 additional practice locations, and is a graduate of Other (1998).
NPPES Registry Identity
Specialties & Licenses 4
Secondary Practice Locations 6
Other Identifiers 1
Accepted Insurance
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. Tracy J Williams Ph,d., Bcba 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 Tracy Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sioux Falls, SD 57105
- Reassigned Medicare billing, South Dakota enrollment
- 7 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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 Tracy Williams's NPI number?
The NPI number for Tracy Williams is 1114180064. It was assigned to this individual provider in the NPPES registry on July 9, 2008.
Where is Tracy Williams located?
Tracy Williams practices at 1105 W Russell Street, Sioux Falls, SD 57104. The listed phone number is (605) 271-2690.
What is Tracy Williams's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Cognitive & Behavioral, with taxonomy code 103TB0200X.
Is Tracy Williams enrolled in Medicare?
Yes. Tracy 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 Tracy Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tracy Williams reassigns Medicare benefits to Volunteers Of America, Dakotas (Sioux Falls, SD). 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 Tracy Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tracy Williams accept?
Health plans from Ambetter Health, Ambetter from Sunflower Health Plan, Sanford Health Plan, Wellmark Health Plan of Iowa, Inc. and Wellmark of South Dakota, Inc. list Tracy Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Tracy Williams was last updated on July 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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. Tracy J Williams, PH,D., BCBA · NPI 1114180064
Cognitive & Behavioral provider in Sioux Falls, South Dakota. Individual provider, active in the CMS NPPES registry since July 9, 2008.
## Identity
- **NPI:** 1114180064 (Entity type: Individual)
- **Enumerated:** July 9, 2008
- **Primary specialty:** Psychologist - Cognitive & Behavioral · taxonomy 103TB0200X
- **Sole proprietor:** No
## Practice location
- **Address:** 1105 W RUSSELL STREET, Sioux Falls, SD 57104
- **Phone:** (605) 271-2690 · **Fax:** (605) 271-3956
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Volunteers Of America, Dakotas (NPI 1174664601, Sioux Falls, SD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** July 22, 2021
- **Other identifiers:** Medicaid 6551930 (SD)
---
Source: [NPI Profile](https://npiprofile.com/npi/1114180064) · Data from the CMS NPPES public registry.