Mariola Grzeszczyk, APRN
Mariola Grzeszczyk, APRN is a Nurse Practitioner in Rockford, IL, registered under NPI 1003425463. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Rockford, based on OpenStreetMap data collected Sep 8, 2026. Parking is available about 0.49 mi away. There is EV charging 819 ft from the office — useful if you are driving in from out of town. A pharmacy sits 736 ft from the entrance (Walgreens), which helps if you leave with a prescription.
Getting here and what is nearby
Restaurant Wendy's 461 ft ~2 min
5965 East Riverside Boulevard, Rockford 61114
09:00-22:00
Gas station Amoco 702 ft ~3 min
Pharmacy Walgreens 736 ft ~3 min
Convenience Amoco 792 ft ~3 min
EV charging 819 ft ~4 min
Restaurant Sam's Ristorante & Pizzeria 943 ft ~4 min
Restaurant Papa John's 946 ft ~4 min
4011 East Riverside Boulevard, Loves Park 61114
Mo-Th,Su 10:00-24:00; Fr-Sa 10:00-01:00; PH open
Parking 0.21 mi ~5 min
Convenience Mobil Mart 0.39 mi ~8 min
Gas station Mobil 0.39 mi ~8 min
Parking 0.49 mi ~10 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 |
|---|---|---|
| 209022930 | IL | Nurse Practitioner primary |
| 2019055819 | IL | Family Nurse Practitioner |
| 209022930 | IL | Family Nurse Practitioner |
This provider holds licence 209022930 issued in IL. 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
- 8628416344
- Enrollment ID
- I20240401001592
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 Nurse Practitioner covers
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners. NUCC Health Care Provider Taxonomy, code 363L00000X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 363L00000X | Nurse Practitioner | 209022930 | IL | primary |
| 363LF0000X | Family Nurse Practitioner Family | 2019055819 | IL | |
| 363LF0000X | Family Nurse Practitioner Family | 209022930 | IL |
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 | 1003425463 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 30, 2020 |
| Last updated | Feb 28, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | APRN |
| Practice address |
5875 E RIVERSIDE BLVD Rockford, IL 61114 (815) 398-9491 Fax (815) 381-7498 |
| Mailing address |
40 75TH ST Willowbrook, IL 60527 |
| Other names |
Mariola Solarz Other Name |
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 | 4 | 2 | 5 | 4 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 2 | 1 | 4 | 3 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.