Jillian R Grzegorczyk, RN

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

4704274790 Issued in MI

Practice address

2009 Holton Rd
Muskegon, MI 49445-1578

Phone

(616) 935-3479

Fax

(616) 935-3481

NPI assigned

Aug 11, 2018

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other names 1

• Jillian Renee Kilduff Former name

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in MI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Spectrum Health Primary Care PartnersGroup PAC ID 4587568647, 2,283 clinicians

Covenant Medical Center, Inc.Group PAC ID 2769387778, 488 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Covenant Medical Center Hospital, Saginaw, MI, CCN 230070
• Spectrum Health Hospital, Grand Rapids, MI, CCN 230038

Medicare enrollment (NPD)

Enrolled

Credentials

Registered Nurse

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jgrzegorczyk50868@direct.covenanthealthcare.com
• Direct secure messaging: jgrzegorczyk3414981@epic00.corewelldirect.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Covenant Medical Center, Inc.

  • Emergency Medicine Physician
  • Saginaw, MI
  • NPI 1972590412
  Medicare reassignment Care Compare group NPD
• Spectrum Health Primary Care Partners

  • Internal Medicine Physician
  • Grand Rapids, MI
  • NPI 1235188673
  Medicare reassignment Care Compare group NPD
• Covenant Medical Center, Inc

  • Family Medicine Physician
  • Saginaw, MI
  • NPI 1619412376
  NPD
• Spectrum Health Primary Care Partners

  • Internal Medicine Physician
  • Grand Rapids, MI
  • NPI 1689499667
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Covenant Medical Center, Inc.

  • General Acute Care Hospital
  • Saginaw, MI
  • NPI 1588656946
  Care Compare affiliation
• Pennock Hospital

  • Critical Access Hospital
  • Hastings, MI
  • NPI 1932695525
  Care Compare affiliation
• Spectrum Health Hospitals

  • General Acute Care Hospital
  • Grand Rapids, MI
  • NPI 1922090554
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1533945600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776902400000",
    "number": "1942789805",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 MICHIGAN ST NE",
            "address_2": "MC 845",
            "city": "GRAND RAPIDS",
            "state": "MI",
            "postal_code": "495032560"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2009 HOLTON RD",
            "city": "MUSKEGON",
            "state": "MI",
            "postal_code": "494451578",
            "telephone_number": "616-935-3479",
            "fax_number": "616-935-3481"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRZEGORCZYK",
        "first_name": "JILLIAN",
        "middle_name": "R",
        "name_prefix": "Mrs.",
        "credential": "RN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-08-11",
        "last_updated": "2026-04-23",
        "certification_date": "2026-04-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MI",
            "license": "4704274790",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "jgrzegorczyk3414981@epic00.corewelldirect.org",
            "affiliation": "N",
            "address_1": "2009 Holton Rd",
            "city": "Muskegon",
            "state": "MI",
            "country_code": "US",
            "postal_code": "494451578",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicarr02.spectrumhealth.org/EpicFHIR/api/FHIR/R4/",
            "affiliation": "N",
            "address_1": "2009 Holton Rd",
            "city": "Muskegon",
            "state": "MI",
            "country_code": "US",
            "postal_code": "494451578",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "JILLIAN",
            "last_name": "KILDUFF",
            "middle_name": "RENEE",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Patricia Ann Groessl, EDD
• Lynette Kay Groothuis
• Clairissa Groppi, PTA
• Amy Grossman, PA
• Madison Grunow
• GT Mobility LLC.
• Cheryl Marie Guajardo
• Darren R. Guffey, P.T.
• Alexandra J Guinn, PA-C
• Gundersen and Zuker PLLC

• Family Nurse Practitioner in Muskegon, MI
• Providers in Muskegon, MI by specialty
• Family Nurse Practitioner in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 23, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.