Megan Liston, CASAC
Megan Liston, CASAC is an Addiction (Substance Use Disorder) Counselor in Elmont, NY, registered under NPI 1003096454.
Getting there
Here is what surrounds this office in Elmont, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 544 ft away. The nearest transit stop is 617 ft away, served by Elmont Road & Hempstead Turnpike.
Getting here and what is nearby
Transit Hempstead Turnpike & Hendrickson Avenue 382 ft ~2 min
Parking 349 ft ~2 min
Restaurant Empire Pizza & Fried Chicken 372 ft ~2 min
492 Hempstead Turnpike, Elmont 11003
Hotel Parkway Motor Inn 488 ft ~2 min
35 Plainfield Avenue, Elmont 11003
Transit Hempstead Turnpike & Elmont Road 507 ft ~2 min
Parking 528 ft ~3 min
Parking 544 ft ~3 min
Restaurant Villa Mar 548 ft ~3 min
481 Hempstead Turnpike, Elmont 11003
Gas station Exxon 563 ft ~3 min
Restaurant Burger King 584 ft ~3 min
Transit Elmont Road & Hempstead Turnpike 617 ft ~3 min
Gas station Sunoco 0.37 mi ~8 min
Gas station Global 0.41 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
| Licence | State | Specialty |
|---|---|---|
| 8160 | NY | Addiction (Substance Use Disorder)… primary |
This provider holds licence 8160 issued in NY. 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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YA0400X
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 | 1003096454 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 13, 2007 |
| Last updated | Nov 13, 2007 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | CASAC |
| Practice address |
40 ELMONT RD Elmont, NY 11003 (516) 437-0440 Fax (515) 326-1159 |
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 | 0 | 9 | 6 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 3 | 4 | 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.