Elissa Derksen, LPN
Elissa Derksen, LPN is a Licensed Practical Nurse in Waukesha, WI, registered under NPI 1003573841.
Getting there
Here is what surrounds this office in Waukesha, based on OpenStreetMap data collected Oct 7, 2026. Parking is available about 0.45 mi away. A pharmacy sits 0.44 mi from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.32 mi away.
Getting here and what is nearby
Restaurant Dunkin' 275 ft ~2 min
2450 North Grandview Boulevard, Waukesha 53188
04:00-20:00
Gas station Kwik Trip 591 ft ~3 min
Restaurant Culver's 860 ft ~4 min
2600 North Grandview Boulevard, Waukesha 53188
Mo-Su 10:00-22:00
Parking 0.22 mi ~5 min
Restaurant Taco Bell 0.24 mi ~5 min
Parking 0.30 mi ~6 min
Coffee Starbucks 0.32 mi ~7 min
Hotel avid Hotel 0.40 mi ~8 min
Pharmacy CVS Pharmacy 0.44 mi ~9 min
Parking 0.45 mi ~10 min
Hotel Waukesha Grand 0.46 mi ~10 min
2840 North Grandview Boulevard, Pewaukee 53072-5540
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 |
|---|---|---|
| 30994431 | WI | Licensed Practical Nurse primary |
This provider holds licence 30994431 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 Licensed Practical Nurse covers
An individual with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required for certification as a Registered Nurse. Requirements for education, experience, licensure, and job responsibilities vary among the states. NUCC Health Care Provider Taxonomy, code 164W00000X
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 | 1003573841 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 28, 2021 |
| Last updated | Nov 28, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | LPN |
| Practice address |
2422 N GRANDVIEW BLVD Waukesha, WI 53188 (262) 549-6600 |
| Mailing address |
407 HARTWOOD LN Hartland, WI 53029 |
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 | 7 | 3 | 8 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 7 | 6 | 8 | 8 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.