Ashley Leyva
Ashley Leyva is a provider specialising in Behavior Analyst in Ontario, CA, registered under NPI 1003526732.
Getting there
Here is what surrounds this office in Ontario, based on OpenStreetMap data collected Sep 24, 2026. Parking is available about 648 ft away. There is EV charging 0.44 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 0.50 mi away. If you arrive early, there is a coffee shop 0.39 mi away.
Getting here and what is nearby
Hotel Country Inn & Suites, Ontario at Ontario Mills, CA 364 ft ~2 min
EV charging 516 ft ~2 min
Parking 525 ft ~2 min
Hotel Hyatt Place Ontario/Rancho Cucamonga 585 ft ~3 min
Parking 570 ft ~3 min
Parking 648 ft ~3 min
Hotel Hampton Inn & Suites Ontario 886 ft ~4 min
Restaurant Burger King 0.30 mi ~6 min
1 Mills Circle, Ontario 91764
Mo-Th 10:00-20:00; Fr-Sa 10:00-21:00; Su 11:00-20:00
Restaurant Chipotle 0.31 mi ~7 min
Coffee Starbucks 0.33 mi ~7 min
Restaurant Heroes Restaruant and Brewhouse 0.34 mi ~7 min
Coffee Starbucks 0.39 mi ~8 min
Grocery Grocery Outlet 0.39 mi ~8 min
4420 Ontario Mills Parkway, Ontario 91764
Mo-Su 08:00-21:00
EV charging Tesla Supercharger 0.41 mi ~9 min
EV charging Tesla Supercharger 0.44 mi ~9 min
Gas station Shell 0.47 mi ~10 min
Transit 0.49 mi ~10 min
Transit 0.50 mi ~10 min
Gas station 76 0.51 mi ~11 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 | 1003526732 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 5, 2022 |
| Last updated | Dec 5, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
4688 ONTARIO MILLS PKWY Ontario, CA 91764 (714) 876-1518 |
| Mailing address |
16705 STAGS LEAP LN Fontana, CA 92336 |
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 | 5 | 2 | 6 | 7 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 2 | 3 | 7 | 6 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.