Denean Overton-russell
Denean Overton-russell is a Mental Health Counselor in Monrovia, CA, registered under NPI 1003382144. 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 Monrovia, based on OpenStreetMap data collected Sep 22, 2026. Parking is available about 833 ft away. There is EV charging 0.20 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.39 mi away, served by Foothill Transit 187. A pharmacy sits 836 ft from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.36 mi away.
Getting here and what is nearby
Parking 339 ft ~2 min
Grocery Trader Joe's 718 ft ~3 min
604 West Huntington Drive, Monrovia 91016
Mo-Su 08:00-21:00
Parking 821 ft ~4 min
Parking 833 ft ~4 min
Pharmacy Walgreens 836 ft ~4 min
490 West Huntington Drive, 91016
Mo-Fr 08:00-22:00; Su 08:00-13:30,14:00-18:00
Restaurant Mimi's Cafe 987 ft ~4 min
500 West Huntington Drive, Monrovia 91016
Restaurant McDonald's 1,016 ft ~4 min
480 West Huntington Drive, Monrovia 91016
06:00-22:00
EV charging 0.20 mi ~4 min
Grocery Sprouts Farmers Market 0.20 mi ~5 min
400 West Huntington Drive, Monrovia 91016
Mo-Su 07:00-22:00
Restaurant In-N-Out Burger 0.21 mi ~5 min
560 West Huntington Drive, Monrovia 91016
Transit Foothill Transit 187 0.22 mi ~5 min
Convenience Water Boy 0.22 mi ~5 min
Grocery Baja Ranch 0.24 mi ~5 min
Transit Foothill Transit 187 0.33 mi ~7 min
Hotel Courtyard 0.33 mi ~7 min
Gas station Shell 0.35 mi ~8 min
705 West Huntington Drive, Monrovia 91016
Coffee Starbucks 0.36 mi ~8 min
Transit Foothill Transit 187 0.39 mi ~8 min
Hotel Oak Tree Inn 0.43 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 |
|---|---|---|
| A1896003 | CA | Behavior Technician |
This provider holds licence A1896003 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 Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YM0800X
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 | |
|---|---|---|---|---|
| 101YM0800X | Mental Health Counselor Mental Health | — | — | primary |
| 106S00000X | Behavior Technician | A1896003 | CA |
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 | 1003382144 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 16, 2018 |
| Last updated | Dec 19, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Practice address |
1333 S MAYFLOWER AVE STE 220 Monrovia, CA 91016 (888) 805-0759 |
| Mailing address |
1063 MCGAW AVE STE 100 Irvine, CA 92614 |
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 | 3 | 8 | 2 | 1 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 8 | 4 | 1 | 8 |
Sum = 56 · next multiple of 10 = 60 · 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.