Sionie Williams
Sionie Williams is a Behavior Technician in Brockton, MA, registered under NPI 1003317280. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Brockton, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 406 ft away, served by Pearl St. and Almon Ave. If you arrive early, there is a coffee shop 376 ft away.
Getting here and what is nearby
Transit Pearl St and Westfield Dr 174 ft ~1 min
Transit Pearl St. and Mayotte Circle 209 ft ~1 min
Coffee Brockton Cafe Express 376 ft ~2 min
Transit Pearl St. and Almon Ave 406 ft ~2 min
Parking 897 ft ~4 min
Parking 1,020 ft ~4 min
Parking 0.23 mi ~5 min
Gas station Shell gas station/Seasons Corner Market/Marylou's Coffee 0.48 mi ~10 min
955 Belmont Street
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Behavior Technician covers
The behavior technician is a paraprofessional who practices under the close, ongoing supervision of a behavior analyst or assistant behavior analyst certified by the Behavior Analyst Certification Board and/or credentialed by a state (such as through licensure). The behavior technician is primarily responsible for the implementation of components of behavior-analytic treatment plans developed by the supervisor. That may include collecting data on treatment targets and conducting certain types of behavioral assessments (e.g., stimulus preference assessments). The behavior technician does not design treatment or assessment plans or procedures but provides services as assigned by the supervisor responsible for his or her work. NUCC Health Care Provider Taxonomy, code 106S00000X
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 | 1003317280 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 23, 2018 |
| Last updated | Feb 23, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
12 MAYOTTE CIR Brockton, MA 02301 (617) 792-9098 |
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 | 0 | 0 | 3 | 3 | 1 | 7 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 1 | 5 | 2 | 7 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.