Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Tracy J Williams, PHD, BCBA

Individual provider Behavior Analyst · NPI 1114180064

Dr. Tracy J Williams, PHD, BCBA is a Clinical Psychologist in Sioux Falls, South Dakota. Qualified in 1998, 28 years ago. Practices with Volunteers of America Dakotas, a 3-clinician group, works from 7 locations and accepts Medicare assignment. Licensed in South Dakota.

Years since qualifying
28
Licensed in
SD
In the registry since
2008
Specialties on file
4
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.
BCBA — Board Certified Behavior Analyst
Designs and supervises applied behaviour analysis programmes, often for autism.

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Practice location Address checks out

1105 W Russell St
Sioux Falls, SD 57104
Phone: (605) 271-2690
Fax: (605) 271-3956
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (6)

  • 745 10th St Ste C, Rock Valley, IA 51247-1511 — (605) 271-2690
  • 735 3rd St Sw, Perham, MN 56573-1152 — (605) 271-2690
  • 3721 23rd St S Ste 201, Saint Cloud, MN 56301-6199 — (605) 271-2690
  • 405 S Washington St, Aberdeen, SD 57401-4348 — (605) 271-2690
  • 620 N Lawler St, Mitchell, SD 57301-2639 — (605) 271-2690
  • 1704 Westland Rd, Cheyenne, WY 82001-3322 — (605) 271-2690

Specialties & licences

Cognitive & Behavioral Psychologist (primary) Taxonomy 103TB0200X
Behavior Analyst Taxonomy 103K00000X · Licence 1-03-1438 (SD)
Psychologist Taxonomy 103T00000X · Licence 419 (SD)
Intellectual & Developmental Disabilities Psychologist Taxonomy 103TM1800X

Record details

NPI number1114180064
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD , BCBA
Sole proprietorNo
NPI enumeratedJuly 9, 2008
Last updated in NPPESJuly 22, 2021
Certification dateJuly 22, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Volunteers Of America Dakotas — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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