Individual provider Active NPI

Shaun T. Marczak, PA-C

  • Physician Assistant
  • Eau Claire, WI
National Provider Identifier
1275838146
Registry record updated Apr 23, 2021
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
2904-23 Issued in WI
Practice address
1400 Bellinger St
Eau Claire, WI 54703
Phone
(715) 838-3311
NPI assigned
Jan 24, 2011
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 23, 2021

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 2011001605 MO
Physician Assistant 363A00000X 2904-23 WI Primary

Addresses

Primary practice location

1400 Bellinger St
Eau Claire, WI 54703

Mailing address

200 1St St SW
Rochester, MN 55905-1510
Phone (715) 838-5222

Other practice location 1

733 W Clairemont Ave
Eau Claire, WI 54701-6101
Phone (715) 838-5222

Other practice location 2

733 W Clairemont Ave
Eau Claire, WI 54701-6101
Phone (715) 838-5222

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address smarczak23740@ehrdirect.mayoclinicmsg.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
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

Enrollment IDStateProvider typePAC IDDetails
I20120404000205 WI Practitioner - Physician Assistant 9234310632 Reassigns benefits to 7 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2010
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mayo Clinic Health System-Northwest Wisconsin Region IncGroup PAC ID 4385553627, shared by 21 NPIs, 797 clinicians

Practice addresses (Care Compare)

1221 Whipple St
Eau Claire, WI 54703-5270
Phone (715) 838-3806

733 W Clairemont Ave
Eau Claire, WI 54701-6101
Phone (715) 838-5222

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
2011001605MOMDPhysician Assistant
2904-23WIMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Dec 24, 2025 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Jan 1, 2017 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Jan 1, 2017 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Dec 24, 2025 Accepting new patients
Mayo Clinic Health System-Southwest Wisconsin Region, Inc. CurrentSince Dec 15, 2017 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Dec 24, 2025 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Dec 24, 2025 Accepting new patients
Mayo Clinic Health System-Southwest Wisconsin Region, Inc. CurrentSince Dec 15, 2017 Accepting new patients

Locations

200 1st St SW
Rochester, MN 55905
Phone (507) 266-4850

1222 E Woodland Ave
Barron, WI 54812
Phone (715) 537-3166

1501 Thompson St
Bloomer, WI 54724
Phone (715) 568-2000

1400 Bellinger St
Eau Claire, WI 54703
Phone (715) 838-3311

733 W Clairemont Ave
Eau Claire, WI 54701
Phone (715) 838-3806

800 West Ave S
La Crosse, WI 54601
Phone (608) 372-5951

2409 Stout Rd
Menomonie, WI 54751
Phone (715) 231-3937

2321 Stout Rd
Menomonie, WI 54751
Phone (715) 235-5531

13025 8th St
Osseo, WI 54758
Phone (715) 597-2575

705 E Taylor St
Prairie du Chien, WI 53821
Phone (608) 357-2000

800 E Blackhawk Ave
Prairie du Chien, WI 53821
Phone (608) 326-0808

310 W Main St
Sparta, WI 54656
Phone (608) 269-1700

Organizations & group practices 9

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.

Hospital & facility affiliations 1

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

NPI Registry JSON

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

{
    "created_epoch": "1295827200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1619136000000",
    "number": "1275838146",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 1ST ST SW",
            "city": "ROCHESTER",
            "state": "MN",
            "postal_code": "559051510",
            "telephone_number": "715-838-5222"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1400 BELLINGER ST",
            "city": "EAU CLAIRE",
            "state": "WI",
            "postal_code": "54703",
            "telephone_number": "715-838-3311"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "733 W Clairemont Ave",
            "address_purpose": "LOCATION",
            "city": "Eau Claire",
            "state": "WI",
            "postal_code": "547016101",
            "country_code": "US",
            "telephone_number": "715-838-5222",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "733 W Clairemont Ave",
            "address_purpose": "LOCATION",
            "city": "Eau Claire",
            "state": "WI",
            "postal_code": "547016101",
            "country_code": "US",
            "telephone_number": "715-838-5222",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MARCZAK",
        "first_name": "SHAUN",
        "middle_name": "T.",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2011-01-24",
        "last_updated": "2021-04-23",
        "certification_date": "2021-04-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MO",
            "license": "2011001605",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "WI",
            "license": "2904-23",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "smarczak23740@ehrdirect.mayoclinicmsg.org",
            "affiliation": "N",
            "address_1": "1400 Bellinger St",
            "city": "Eau Claire",
            "state": "WI",
            "country_code": "US",
            "postal_code": "54703",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Eau Claire, WI

Sources for this page

Verify at the official NPI Registry.