Sierra Wollen
Sierra Wollen is a Mental Health Counselor in Tukwila, WA, registered under NPI 1003339839.
Getting there
Here is what surrounds this office in Tukwila, based on OpenStreetMap data collected Sep 19, 2026. Parking is available about 934 ft away. There is EV charging 0.32 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 550 ft away, served by Southcenter Boulevard & 62nd Avenue South. If you arrive early, there is a coffee shop 0.23 mi away.
Getting here and what is nearby
Transit Southcenter Boulevard & 65th Avenue South 403 ft ~2 min
Transit Southcenter Boulevard & 65th Avenue South 477 ft ~2 min
Transit Southcenter Boulevard & 62nd Avenue South 550 ft ~3 min
Parking 683 ft ~3 min
Coffee Bobalust 762 ft ~3 min
Restaurant Manila Sunset 751 ft ~3 min
Restaurant Subway 753 ft ~3 min
Parking 789 ft ~3 min
Restaurant Buffalo Wild Wings 862 ft ~4 min
295 Tukwila Parkway, Tukwila 98188
Coffee coffeebae 874 ft ~4 min
Parking 934 ft ~4 min
Coffee Sharetea 0.23 mi ~5 min
Su-Th 12:00-22:00; Fr,Sa 12:00-23:00
Hotel Holiday Inn Express & Suites - Seattle South Tukwila 0.23 mi ~5 min
90 Andover Park East, Tukwila 98188
Convenience ampm 0.30 mi ~6 min
5800 Southcenter Boulevard, Tukwila 98188
Gas station Arco 0.30 mi ~6 min
EV charging 0.32 mi ~7 min
Hotel WoodSpring Suites 0.36 mi ~8 min
15637 West Valley Highway, Tukwila 98188
Hotel Extended Stay America 0.36 mi ~8 min
15635 West Valley Highway, Tukwila 98188
Gas station 7-Eleven 0.43 mi ~9 min
Convenience 7-Eleven 0.44 mi ~9 min
Gas station 76 0.44 mi ~9 min
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 Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YM0800X
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 | 1003339839 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 24, 2017 |
| Last updated | Jul 24, 2017 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
6400 SOUTHCENTER BLVD Tukwila, WA 98188 (206) 444-3600 Fax (206) 444-3610 |
| Mailing address |
1600 E OLIVE ST Seattle, WA 98122 |
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 | 3 | 9 | 8 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 3 | 9 | 8 | 6 |
Sum = 61 · next multiple of 10 = 70 · check digit = 9 · actual last digit = 9
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.