Stephanie Nellesen, FNP
Stephanie Nellesen, FNP is a Family Nurse Practitioner in Saint Louis, MO, registered under NPI 1003362021.
Getting there
Here is what surrounds this office in Saint Louis, based on OpenStreetMap data collected Sep 2, 2026. Parking is available about 802 ft away. The nearest transit stop is 1,026 ft away, served by Mercy Hospital Driveway.
Getting here and what is nearby
Transit New Ballas at Von Gontard 220 ft ~1 min
Transit New Ballas at Ronyn Park 347 ft ~2 min
Parking 355 ft ~2 min
Parking 711 ft ~3 min
Parking 802 ft ~4 min
Transit Mercy Hospital Driveway 1,026 ft ~4 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 |
|---|---|---|
| 2016022548 | MO | Family Nurse Practitioner primary |
This provider holds licence 2016022548 issued in MO. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Nurse Practitioner
- PAC ID
- 6901182310
- Enrollment ID
- I20170420000870
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Family covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LF0000X
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 | 1003362021 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 30, 2016 |
| Last updated | Nov 16, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | FNP |
| Practice address |
621 S NEW BALLAS RD STE 189A Saint Louis, MO 63141 (314) 251-6335 Fax (314) 251-5864 |
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 | 6 | 2 | 0 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 6 | 4 | 0 | 4 |
Sum = 49 · next multiple of 10 = 50 · 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.