Alexander Tafapolsky
Alexander Tafapolsky is a Behavior Technician in Seattle, WA, registered under NPI 1003702671.
Getting there
Here is what surrounds this office in Seattle, based on OpenStreetMap data collected Oct 18, 2026. Parking is available about 0.25 mi away. There is EV charging 0.42 mi from the office (Electrify America Charging Station) — useful if you are driving in from out of town. The nearest transit stop is 433 ft away, served by 5th Ave NE & NE 103rd St. A pharmacy sits 0.48 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.49 mi away.
Getting here and what is nearby
Transit 5th Avenue Northeast & Northeast 103rd Street 158 ft ~1 min
Transit NE 103rd St & 5th Ave NE 377 ft ~2 min
Transit 5th Ave NE & NE 103rd St 433 ft ~2 min
Restaurant Thai Fusion Bistro 427 ft ~2 min
323 Northeast Thornton Place, Seattle 98125
Mo-Th 11:00-21:00; Fr 11:00-22:00; Sa 12:00-22:00; Su 12:00-21:00
Restaurant Subway 433 ft ~2 min
327 Northeast Thornton Place, Seattle 98125
Mo-Fr 07:30-21:00; Sa,Su 09:00-19:00
Coffee Jewel Box Cafe 455 ft ~2 min
321 Northeast Thornton Place, Seattle 98125
Mo-Fr 06:00-21:00; Sa,Su 08:00-21:00
Restaurant Kizuki Ramen & Izakaya - Northgate 504 ft ~2 min
319 Northeast Thornton Place, Seattle 98125
Su-Th 11:00-21:30; Fr,Sa 11:00-22:00
Parking Northgate Station South Deck 1,017 ft ~4 min
Parking Northgate Station Parking Garage 0.24 mi ~5 min
120 Northeast 103rd Street, Seattle
Mo-Sa 04:30-02:00, Su,PH 05:30-01:00
Parking 0.25 mi ~6 min
9706 4th Avenue Northeast, Seattle 98115
Coffee Starbucks 0.27 mi ~6 min
10601 5th Avenue Northeast, Seattle 98125
Mo-Th 07:00-19:00; Fr-Su 07:00-20:00
EV charging Tesla Supercharger 0.31 mi ~7 min
Hotel Hampton Inn & Suites 0.34 mi ~7 min
EV charging Tesla Supercharger 0.36 mi ~8 min
Hotel Residence Inn Seattle Northgate Station 0.36 mi ~8 min
EV charging Electrify America Charging Station 0.42 mi ~9 min
Pharmacy Walgreens 0.44 mi ~9 min
859 Northeast Northgate Way, Seattle 98125
Mo-Fr 09:00-13:30,14:00-21:00; Sa,Su 10:00-13:30,14:00-18:30
Convenience ampm 0.46 mi ~10 min
Gas station Arco 0.47 mi ~10 min
Pharmacy CVS Pharmacy 0.48 mi ~10 min
302 Northeast Northgate Way
Mo-Fr 09:00-13:30,14:00-20:00; Sa-Su 09:00-13:30,14:00-18:00
Coffee Starbucks 0.49 mi ~10 min
302 Northeast Northgate Way, Seattle 98125
Mo-Su 08:00-20:00
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 | 1003702671 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 17, 2025 |
| Last updated | Jun 17, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
10202 5TH AVE NE FL 2 Seattle, WA 98125 (087) 726-4674 |
| Mailing address |
295 89TH ST STE 306 Daly City, CA 94015 |
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 | 7 | 0 | 2 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 5 | 0 | 4 | 6 | 5 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.