Ruth Field
Ruth Field is a provider specialising in Behavior Analyst in Mountlake Terrace, WA, registered under NPI 1003391400.
Getting there
Here is what surrounds this office in Mountlake Terrace, based on OpenStreetMap data collected Sep 22, 2026. Parking is available about 0.22 mi away at North Lot. The nearest transit stop is 1,026 ft away. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Parking 448 ft ~2 min
Restaurant Fork Mediterranean Grill 495 ft ~2 min
Mo-Sa 10:00-21:00; Su 11:00-20:00
Restaurant Subway 501 ft ~2 min
21919 66th Avenue West, Mountlake Terrace 98043
Mo-Fr 08:00-21:30; Sa-Su 09:00-21:00
Parking 544 ft ~3 min
Convenience EZ Deli Mart 571 ft ~3 min
Transit 220th St SW & 66th Ave W 655 ft ~3 min
Transit 220th St SW & 66th Ave W 747 ft ~3 min
Restaurant Port of Subs 818 ft ~4 min
Convenience La Placita Oxaquena 919 ft ~4 min
Gas station Shell 873 ft ~4 min
Convenience Jacksons 956 ft ~4 min
6602 220th Street Southwest, Mountlake Terrace
Transit 1,026 ft ~4 min
Parking North Lot 0.22 mi ~5 min
Coffee Sahm Gook Jih Palace 0.41 mi ~9 min
Coffee Sweet Shots 0.43 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 Behavior Analyst covers
A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans. NUCC Health Care Provider Taxonomy, code 103K00000X
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 | 1003391400 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 2, 2018 |
| Last updated | Oct 2, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
6505 218TH ST SW STE 9 Mountlake Terrace, WA 98043 (425) 563-1093 |
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 | 9 | 1 | 4 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 2 | 4 | 0 |
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.