Kristy Hreben, MA, LLPC
Kristy Hreben, MA, LLPC is an Addiction (Substance Use Disorder) Counselor in Mount Clemens, MI, registered under NPI 1003586603. 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 Mount Clemens, based on OpenStreetMap data collected Oct 8, 2026. Parking is available about 611 ft away. The nearest transit stop is 812 ft away, served by Main / Terry (SB). A pharmacy sits 453 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription.
Getting here and what is nearby
Transit Main / Cass (SB) 172 ft ~1 min
Parking 396 ft ~2 min
Transit Gratiot / Crocker (NB) 402 ft ~2 min
Parking 475 ft ~2 min
Pharmacy CVS Pharmacy 453 ft ~2 min
35 North Walnut Street, Mount Clemens 48043
Parking 611 ft ~3 min
Transit Main / Terry (SB) 812 ft ~4 min
Convenience Shell 0.20 mi ~5 min
12 Market Street, Mount Clemens 48043-5640
Gas station Shell 0.20 mi ~4 min
Convenience Lake City Mini Mart 0.21 mi ~5 min
116 South Main Street, Mount Clemens 48043
Gas station Mobil 0.21 mi ~5 min
116 South Main Street, Mount Clemens 48043
Restaurant Buffalo Wild Wings 0.21 mi ~5 min
Hotel A Victory Inn 0.32 mi ~7 min
Restaurant Louie's Ham & Corned Beef 0.37 mi ~8 min
Gas station Marathon 0.44 mi ~9 min
186 Northbound Gratiot Avenue, Mount Clemens 48043
Convenience Park & Gratiot Marathon 0.45 mi ~9 min
186 Northbound Gratiot Avenue, Mount Clemens 48043
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 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 | 1003586603 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Sep 15, 2021 |
| Last updated | Oct 26, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | MA, LLPC |
| Practice address |
2 CROCKER BLVD Mount Clemens, MI 48043 (586) 468-2266 |
| Mailing address |
58843 MEADOW CREEK BLVD Lenox, MI 48048 |
| Other names |
Kristy Serda Former Legal Business Name |
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 | 8 | 6 | 6 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 8 | 3 | 6 | 0 |
Sum = 47 · next multiple of 10 = 50 · 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.