Mary Gengler, FNP
Mary Gengler, FNP is a Family Nurse Practitioner in Sioux City, IA, registered under NPI 1003271636. 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 Sioux City, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 0.53 mi away. There is EV charging 0.26 mi from the office — useful if you are driving in from out of town. If you arrive early, there is a coffee shop 0.33 mi away.
Getting here and what is nearby
Gas station Murphy USA 496 ft ~2 min
3420 Singing Hills Boulevard, Sioux City 51106
Restaurant 4 Brothers Bar & Grill 866 ft ~4 min
Grocery Walmart Supercenter 0.23 mi ~5 min
3400 Singing Hills Boulevard, Sioux City 51106
24/7
EV charging 0.26 mi ~6 min
Hotel New Victorian Inn & Suites Sioux City 0.28 mi ~6 min
Restaurant Culver's 0.28 mi ~6 min
3102 Singing Hills Boulevard, Sioux City 51106
Mo-Su 10:00-22:00
Coffee Scooter's Coffee 0.33 mi ~7 min
Hotel Days Inn Sioux City 0.35 mi ~8 min
Restaurant KFC 0.35 mi ~8 min
Hotel AmericInn Lodge & Suites Sioux City - Airport 0.36 mi ~8 min
Parking 0.44 mi ~9 min
Gas station Sam's Club 0.48 mi ~10 min
Mo-Su 06:00-22:00
Parking 0.53 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 |
|---|---|---|
| 076492 | IA | Family Nurse Practitioner primary |
This provider holds licence 076492 issued in IA. 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 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 | 1003271636 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 26, 2015 |
| Last updated | Jul 21, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | FNP |
| Practice address |
3500 SINGING HILLS BLVD STE 200 Sioux City, IA 51106 (605) 217-7246 Fax (605) 217-4878 |
| Mailing address |
3500 SINGING HILLS BLVD SUITE 200 Sioux City, IA 51106 |
| Other names |
Mary Gengler Doing Business As |
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 | 2 | 7 | 1 | 6 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 2 | 6 | 6 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.