What is Mariola Grzeszczyk's NPI number?

Mariola Grzeszczyk's National Provider Identifier (NPI) is 1003425463, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mariola Grzeszczyk's specialty?

Mariola Grzeszczyk is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).

Where is Mariola Grzeszczyk located?

Mariola Grzeszczyk's practice location on file with NPPES is 5875 E Riverside Blvd, Rockford, IL 61114-4937.

What is Mariola Grzeszczyk's phone number?

The practice phone number listed in the NPPES registry for Mariola Grzeszczyk is (815) 398-9491.

Does Mariola Grzeszczyk accept Medicare?

Mariola Grzeszczyk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Mariola Grzeszczyk's NPI active?

Yes — Mariola Grzeszczyk's NPI (1003425463) is active in the NPPES registry as of the last update on 2025-02-28.

IndividualActiveAccepts Medicare

Mariola Grzeszczyk, APRN

NPI 1003425463 · Nurse Practitioner · Rockford, IL

Mariola Grzeszczyk, APRN is a Nurse Practitioner provider in Rockford, IL (NPI 1003425463).

Provider details

NPI number: 1003425463
Entity type: Individual
Primary specialty: Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Credential: APRN
Sex: Female
Sole proprietor: No
License: 2019055819 (IL)

Practice location

5875 E Riverside Blvd

Rockford, IL 61114-4937

Phone: (815) 398-9491

Fax: (815) 381-7498

Street-level locationGet directions

More IL providers

Mailing address

40 75th St

Willowbrook, IL 60527-2325

Specialties & taxonomies

Nurse PractitionerPrimary363L00000XLicense 209022930 (IL)
Physician Assistants & Advanced Practice Nursing Providers
Family Nurse Practitioner363LF0000XLicense 2019055819 (IL)
Physician Assistants & Advanced Practice Nursing Providers
Family Nurse Practitioner363LF0000XLicense 209022930 (IL)
Physician Assistants & Advanced Practice Nursing Providers

Additional practice locations (2)

5140 N California Ave Ste 575
Chicago, IL 60625-7065
Phone: (773) 878-6200
40 75th St
Willowbrook, IL 60527-2325
Phone: (630) 581-5372

Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(58/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
6 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
3 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
197 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	37	$108
Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804	36	$16
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	27	$80
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	24	$149
Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811	22	$41
Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass	15	14
Azithromycin	13	13
Prednisone	13	13
Albuterol Sulfatebrand: Albuterol Sulfate Hfa	12	12
Cephalexin	11	11
Fluticasone Propionate	11	11

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Enumerated: 2020-07-30
Last updated: 2025-02-28
Certified: 2025-02-28

Frequently asked questions

What is Mariola Grzeszczyk's NPI number?: Mariola Grzeszczyk's National Provider Identifier (NPI) is 1003425463, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mariola Grzeszczyk's specialty?: Mariola Grzeszczyk is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
Where is Mariola Grzeszczyk located?: Mariola Grzeszczyk's practice location on file with NPPES is 5875 E Riverside Blvd, Rockford, IL 61114-4937.
What is Mariola Grzeszczyk's phone number?: The practice phone number listed in the NPPES registry for Mariola Grzeszczyk is (815) 398-9491.
Does Mariola Grzeszczyk accept Medicare?: Mariola Grzeszczyk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Mariola Grzeszczyk's NPI active?: Yes — Mariola Grzeszczyk's NPI (1003425463) is active in the NPPES registry as of the last update on 2025-02-28.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	37	$108
Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804	36	$16
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	27	$80
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	24	$149
Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811	22	$41
Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass	15	14
Azithromycin	13	13
Prednisone	13	13
Albuterol Sulfatebrand: Albuterol Sulfate Hfa	12	12
Cephalexin	11	11
Fluticasone Propionate	11	11

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (2)

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (2)

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)