Mariola U. Grzeszczyk, APRN
Nurse Practitioner · Rockford, IL
Mariola U. Grzeszczyk, APRN is a nurse practitioner with a practice address in Rockford, Illinois, and NPI 1003425463, issued on Jul 30, 2020. Check the license (Illinois 209022930, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mariola U. Grzeszczyk
- Credential
- APRN
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License numbers
- 209022930 IL
2019055819 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5875 E Riverside Blvd, Rockford, IL 61114
- Phone
- (815) 398-9491
- Enumerated
- Jul 30, 2020
- Record last updated
- Feb 28, 2025
- Fax
- (815) 381-7498
- Medicare enrollment
- Enrolled (PECOS I20240401001592); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 5875 E Riverside Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mariola U. Grzeszczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 209022930Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average nurse practitioner in 2024
176 Medicare Part D claims for 107 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass15 claims
- Azithromycin13 claims
- Prednisone13 claims
- Albuterol Sulfate Hfa12 claims
- Cephalexin11 claims
- Fluticasone Propionate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 3 group practices
- Cermak Medical Group LLCCicero, IL
- Midwest Express Care 2, IncWillowbrook, IL
- Osf Multi-Specialty GroupDixon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mariola U. Grzeszczyk among 4,892 nurse practitioner records in Illinois
Mariola U. Grzeszczyk, APRN is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 61% of them.
- NPI issued2020 · 61% of these records are older, 33% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2019 · median 2018 among the 3,389 with a school on file
- Record last updated2025 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 nurse practitioner records list a practice address in Rockford
They are 129 of the 3,893 NPPES records with a practice address in Rockford, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Rockford → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Kyle Bergan, DNP, APRN, FNP-CRockford, IL 611141114490224
- Courtney Brannan, APNRockford, IL 611141134695281
- Amy EkbergRockford, IL 611141427557446
- Amanda Foit, NPRockford, IL 611141023426475
- Laura Koch Loner, ANPRockford, IL 611141376714600
- Christine Krause, A.P.N.Rockford, IL 611141801886890
- Susan Kutz, APNRockford, IL 611141235149998
- Courtnea Malugen, N.P.Rockford, IL 611141356844542
Common questions
What is Mariola U. Grzeszczyk, APRN's NPI number?
Mariola U. Grzeszczyk, APRN's National Provider Identifier (NPI) is 1003425463, issued on Jul 30, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mariola U. Grzeszczyk, APRN located?
The NPPES record lists a practice address at 5875 E Riverside Blvd, Rockford, IL, 61114. Phone: (815) 398-9491. Providers update this record themselves, so call before visiting.
How can I verify Mariola U. Grzeszczyk, APRN's license?
NPPES lists Illinois license number 209022930, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
How much does Mariola U. Grzeszczyk, APRN prescribe under Medicare Part D?
In 2024, Mariola U. Grzeszczyk, APRN had 176 Medicare Part D claims for 107 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.