NPIMap

Individual provider Active NPI

Ashley M Loeffler, MD

  • Hospitalist Physician
  • Eau Claire, WI
National Provider Identifier
1265952030
Registry record updated May 4, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
74140 Issued in WI
Practice address
1400 Bellinger St
Eau Claire, WI 54703-5222
Phone
(715) 838-5222
NPI assigned
Jun 22, 2017
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 4, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X R-11040 IA
Hospitalist Physician 208M00000X 74140 WI Primary
Internal Medicine Physician 207R00000X 74140-20 WI

Addresses

Primary practice location

1400 Bellinger St
Eau Claire, WI 54703-5222

Mailing address

PO Box 860912
Minneapolis, MN 55486-0912
Phone (507) 284-2511

Other names 1

  • Ashley Osenga Former name

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address aosenga2233829@ehrdirect.mayoclinicmsg.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20201116001441 WI Practitioner - HospitalistPractitioner - Internal Medicine 6103195060 Reassigns benefits to 7 organizations

Care Compare profile

Medicare Care Compare
Specialty
HospitalistAlso: Internal Medicine
Education
Sanford School of Medicine of University of South Dakota, 2017
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)

1400 Bellinger St
Eau Claire, WI 54703-5222
Phone (715) 838-5222

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
R-11040IAMDInternal Medicine Physician
74140-20WIMDInternal Medicine Physician
74140WIMDHospitalist Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Current Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Current Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Current Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Current Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Jul 29, 2024 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Current Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince Jul 29, 2024 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

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

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

719 W Hamilton Ave
Ste B
Eau Claire, WI 54701

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

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

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

Interoperability endpoints

  • Direct secure messaging: aosenga2233829@ehrdirect.mayoclinicmsg.org

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 4

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": "1498089600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777852800000",
    "number": "1265952030",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 860912",
            "city": "MINNEAPOLIS",
            "state": "MN",
            "postal_code": "554860912",
            "telephone_number": "507-284-2511",
            "fax_number": "507-284-0702"
        },
        {
            "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": "547035222",
            "telephone_number": "715-838-5222"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LOEFFLER",
        "first_name": "ASHLEY",
        "middle_name": "M",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-06-22",
        "last_updated": "2026-05-04",
        "certification_date": "2026-05-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IA",
            "license": "R-11040",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WI",
            "license": "74140",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "74140-20",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "aosenga2233829@ehrdirect.mayoclinicmsg.org",
            "affiliation": "N",
            "address_1": "1400 Bellinger St",
            "city": "Eau Claire",
            "state": "WI",
            "country_code": "US",
            "postal_code": "547035222",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "ASHLEY",
            "last_name": "OSENGA",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Eau Claire, WI

Sources for this page

Verify at the official NPI Registry.