Mark Crevelli, BCBA
Mark Crevelli, BCBA is a provider specialising in Behavior Analyst in Gardena, CA, registered under NPI 1003476243.
Getting there
Here is what surrounds this office in Gardena, based on OpenStreetMap data collected Sep 29, 2026. Parking is available about 0.38 mi away. If you arrive early, there is a coffee shop 0.30 mi away.
Getting here and what is nearby
Parking 250 ft ~1 min
Parking 426 ft ~2 min
Restaurant The Pan 625 ft ~3 min
Restaurant Otafuku 813 ft ~4 min
16525 South Western Avenue, Gardena 90247
We-Th 11:30-14:00, 17:30-21:00; Fr-Sa 11:30-14:00, 17:30-21:30; Su 17:00-20:30
Grocery Albertsons 0.27 mi ~6 min
Coffee Sunright Tea Studio 0.30 mi ~6 min
1717 West Artesia Boulevard
Restaurant Chipotle 0.33 mi ~7 min
1755 West Artesia Boulevard, Gardena 90248
Mo-Su 10:30-23:00
Parking 0.38 mi ~8 min
2005 West 164th Street, Torrance 90504
Gas station Chevron 0.39 mi ~8 min
Convenience Western Super Market 0.40 mi ~9 min
Convenience ampm 0.40 mi ~9 min
Gas station Arco 0.40 mi ~8 min
Convenience ExtraMile 0.41 mi ~9 min
Hotel Dynasty Inn 0.42 mi ~9 min
Grocery Tokyo Central 0.43 mi ~9 min
1740 West Artesia Boulevard, Gardena 90248
08:00-22:00
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 1-19-36925 | CA | Behavior Analyst primary |
This provider holds licence 1-19-36925 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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 | 1003476243 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 19, 2019 |
| Last updated | Jun 19, 2019 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | BCBA |
| Practice address |
18726 S WESTERN AVE Gardena, CA 90248 (310) 856-0800 |
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 | 4 | 7 | 6 | 2 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 7 | 3 | 2 | 8 |
Sum = 57 · next multiple of 10 = 60 · check digit = 3 · actual last digit = 3
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.