Elliott Marx
Elliott Marx is a provider specialising in Behavior Analyst in Bellmore, NY, registered under NPI 1003216854. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Bellmore, based on OpenStreetMap data collected Sep 12, 2026. Parking is available about 0.37 mi away. The nearest transit stop is 0.31 mi away, served by Merrick Road & Bellmore Avenue. A pharmacy sits 864 ft from the entrance (Precision Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Transit Merrick Road & Centre Avenue 285 ft ~2 min
Gas station Hess 481 ft ~2 min
Restaurant Redefine Meals 654 ft ~3 min
2693 Merrick Road, Bellmore 11710
Mo-Su 08:00-22:00
Pharmacy Precision Pharmacy 864 ft ~4 min
Transit Merrick Road & Park Place 949 ft ~4 min
Convenience 7-Eleven 998 ft ~4 min
Transit Merrick Road & Bellmore Avenue 0.31 mi ~7 min
Coffee Starbucks 0.31 mi ~7 min
Restaurant Applebee's 0.32 mi ~7 min
Gas station Mobil 0.35 mi ~7 min
Parking 0.35 mi ~8 min
Restaurant Carvalhos 0.35 mi ~8 min
2700 Sunrise Highway, Bellmore 11710
Parking 0.37 mi ~8 min
Parking 0.37 mi ~8 min
Grocery King Kullen 0.38 mi ~8 min
2730 Sunrise Highway, Bellmore 11710
Coffee Mediterranean Diner 0.47 mi ~10 min
Coffee Soul Brew 0.48 mi ~10 min
2718 Grand Avenue, Bellmore 11710
Convenience 7-Eleven 0.49 mi ~10 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 | 1003216854 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 29, 2014 |
| Last updated | Aug 29, 2014 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
2631 MERRICK RD Bellmore, NY 11710 (516) 590-7575 |
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 | 2 | 1 | 6 | 8 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 1 | 3 | 8 | 1 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
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.