Jillian R. Grzegorczyk, RN
Family Nurse Practitioner · Muskegon, MI
Jillian R. Grzegorczyk, RN is a family nurse practitioner with a practice address in Muskegon, Michigan, and NPI 1942789805, issued on Aug 11, 2018. Check the license (Michigan 4704274790, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jillian R. Grzegorczyk
- Credential
- RN
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 4704274790 MI
Self-reported in NPPES; status is on the state search - Practice location
- 2009 Holton RD, Muskegon, MI 49445
- Phone
- (616) 935-3479
- Enumerated
- Aug 11, 2018
- Record last updated
- Apr 23, 2026
- Fax
- (616) 935-3481
- Medicare enrollment
- Enrolled (PECOS I20190110000410); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 5,356 in Michigan → Look up another NPI →
Also registered at 2009 Holton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kilee Aamodt, PA-CPhysician Assistant1578964300
- Earl Beam, PAPhysician Assistant1174589261
- Paul Bradley, DNP, FNP-CFamily Nurse Practitioner1164153672
- Melissa Brown, D.O.Family Medicine Physician1063605822
- Anita Buckner, FNPFamily Nurse Practitioner1073175303
- Anne Clancy, DPTPhysical Therapist1770719734
Verify Jillian R. Grzegorczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 4704274790Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average family nurse practitioner in 2024
1,334 Medicare Part D claims for 282 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Spironolactone223 claims
- Metoprolol Succinate179 claims
- Jardiance127 claims
- Entresto100 claims
- Furosemide99 claims
- Farxiga70 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.
Industry payments in 2024: $348.10
18 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Covenant Medical Center IncSaginaw, MI
- Spectrum Health Primary Care PartnersMuskegon, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jillian R. Grzegorczyk among 5,356 family nurse practitioner records in Michigan
Jillian R. Grzegorczyk, RN is one of 5,356 family nurse practitioner records with a practice address in Michigan. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 40% of them.
- NPI issued2018 · 40% of these records are older, 53% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2018 · median 2019 among the 3,254 with a school on file
- Record last updated2026 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
48 family nurse practitioner records list a practice address in Muskegon
They are 48 of the 2,646 NPPES records with a practice address in Muskegon, and 5,356 family nurse practitioner records in Michigan.
All 5,356 in Michigan → Every provider in Muskegon → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Paul Bradley, DNP, FNP-CMuskegon, MI 494451164153672
- Anita Buckner, FNPMuskegon, MI 494451073175303
- Brooke Cudney, NPMuskegon, MI 494451497188668
- Justin DonoghueMuskegon, MI 494451295346104
- Jeremy Kaley, FNPMuskegon, MI 494451972275832
- Victoria Karcis, NPMuskegon, MI 494451912436320
- Diana Leroux, FNP-BCMuskegon, MI 494451659935716
- Brenna Long, NP-CMuskegon, MI 494451619589223
Common questions
What is Jillian R. Grzegorczyk, RN's NPI number?
Jillian R. Grzegorczyk, RN's National Provider Identifier (NPI) is 1942789805, issued on Aug 11, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Jillian R. Grzegorczyk, RN located?
The NPPES record lists a practice address at 2009 Holton RD, Muskegon, MI, 49445. Phone: (616) 935-3479. Providers update this record themselves, so call before visiting.
How can I verify Jillian R. Grzegorczyk, RN's license?
NPPES lists Michigan license number 4704274790, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Jillian R. Grzegorczyk, RN prescribe under Medicare Part D?
In 2024, Jillian R. Grzegorczyk, RN had 1,334 Medicare Part D claims for 282 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.