Nicholas Hayon
Nicholas Hayon is an Addiction (Substance Use Disorder) Counselor in West Allis, WI, registered under NPI 1003128638. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 West Allis, based on OpenStreetMap data collected Sep 7, 2026. Parking is available about 0.41 mi away. The nearest transit stop is 0.20 mi away, served by Lincoln & 105th Street.
Getting here and what is nearby
Transit Lincoln & 102nd Street 154 ft ~1 min
Transit Lincoln & 102nd Street 241 ft ~1 min
Transit Lincoln & 105th Street 0.20 mi ~5 min
Parking 0.29 mi ~6 min
Parking 0.38 mi ~8 min
Parking 0.41 mi ~9 min
Restaurant Wingstop 0.45 mi ~9 min
Restaurant Subway 0.45 mi ~9 min
2251 South 108th Street, West Allis 53227
Mo-Fr 07:30-21:00; Sa-Su 09:00-21:00
Restaurant Singa Thai Restaurant 0.45 mi ~10 min
Grocery Piggly Wiggly 0.46 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
| Licence | State | Specialty |
|---|---|---|
| 15861-130 | WI | Addiction (Substance Use Disorder)… primary |
This provider holds licence 15861-130 issued in WI. 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
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 101YA0400X | Addiction (Substance Use Disorder) Counselor Addiction (Substance Use Disorder) | 15861-130 | WI | primary |
| 101YM0800X | Mental Health Counselor Mental Health | — | — |
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 | 1003128638 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 12, 2010 |
| Last updated | Jul 12, 2010 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
10201 W LINCOLN AVE SUITE 102 West Allis, WI 53227 (414) 546-6880 Fax (414) 546-6891 |
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 | 1 | 2 | 8 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 2 | 7 | 6 | 6 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.