Tracy Williams, PH,D., BCBA
Tracy Williams, PH,D., BCBA is a Cognitive & Behavioral Psychologist in Sioux Falls, SD, registered under NPI 1114180064. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1105 W RUSSELL STREET, Sioux Falls, SD 57104. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 1-03-1438 | SD | Behavior Analyst |
| 419 | SD | Psychologist |
This provider holds licence 1-03-1438 issued in SD. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Clinical Psychologist
- PAC ID
- 2668648023
- Enrollment ID
- I20120105000925
Medicare enrolment is recorded as approved under the provider type Practitioner - Clinical Psychologist. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Cognitive & Behavioral covers
A psychologist who reflects an experimental-clinical approach distinguished by use of principles of human learning and development and theories of cognitive processing to promote meaningful change in maladaptive human behavior and thinking. NUCC Health Care Provider Taxonomy, code 103TB0200X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103TB0200X | Cognitive & Behavioral Psychologist Cognitive & Behavioral | — | — | primary |
| 103K00000X | Behavior Analyst | 1-03-1438 | SD | |
| 103T00000X | Psychologist | 419 | SD | |
| 103TM1800X | Intellectual & Developmental Disabilities Psychologist Intellectual & Developmental Disabilities | — | — |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1114180064 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 9, 2008 |
| Last updated | Jul 22, 2021 |
| Status | Active |
| Sole proprietor | No |
| Credential | PH,D., BCBA |
| Practice address |
1105 W RUSSELL STREET Sioux Falls, SD 57104 (605) 271-2690 Fax (605) 271-3956 |
| Mailing address |
1105 W RUSSELL ST Sioux Falls, SD 57104 |
| Other identifiers |
6551930
· Medicaid (SD) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 1 | 4 | 1 | 8 | 0 | 0 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 2 | 4 | 2 | 8 | 0 | 0 | 3 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.