Mary Fenimore, CADC
Mary Fenimore, CADC is an Addiction (Substance Use Disorder) Counselor in Middletown, DE, registered under NPI 1003105339. 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 Middletown, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 562 ft away. If you arrive early, there is a coffee shop 0.24 mi away.
Getting here and what is nearby
Hotel Hampton 404 ft ~2 min
Parking 480 ft ~2 min
Parking 530 ft ~3 min
Restaurant Bob Evans 526 ft ~2 min
200 Casa Drive, Middletown 19709
Mo-Su 07:00-21:00
Parking 562 ft ~3 min
Restaurant Panera Bread 971 ft ~4 min
584 Middletown Warwick Road, Middletown 19709
Mo-Sa 06:00-21:00; Su 07:00-21:00
Grocery Aldi 947 ft ~4 min
1002 Bunker Hill Road, Middletown 19709-4689
09:00-20:00
Restaurant Taco Reho 1,028 ft ~4 min
100 Sandhill Drive, Middletown 19709
Mo-Th,Su 11:00-21:00; Fr-Sa 11:00-22:00
Gas station Wawa 0.22 mi ~5 min
Gas station Wawa 0.23 mi ~5 min
Coffee Starbucks 0.24 mi ~5 min
Convenience Wawa 0.24 mi ~5 min
Convenience Dash In 0.29 mi ~6 min
405 Middletown Warwick Road, Middletown 19709
24/7
Grocery Food Lion 0.30 mi ~7 min
501 West Main Street, Middletown 19709
07:00-23:00
Gas station Valero 0.38 mi ~8 min
Grocery Lidl 0.45 mi ~10 min
359 Autopark Drive, Middletown 19709
08:00-21:00
Hotel Holiday Inn Express 0.51 mi ~11 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 |
|---|---|---|
| 429 | DE | Addiction (Substance Use Disorder)… primary |
This provider holds licence 429 issued in DE. 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 | 1003105339 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 7, 2011 |
| Last updated | Apr 14, 2018 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | CADC |
| Practice address |
118 SANDHILL DR STE 202 Middletown, DE 19709 (302) 674-2380 Fax (302) 376-6212 |
| Mailing address |
156 S STATE STREET ALY Dover, DE 19904 |
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 | 0 | 5 | 3 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 0 | 1 | 3 | 6 |
Sum = 41 · next multiple of 10 = 50 · check digit = 9 · actual last digit = 9
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.