NPIMap

Individual provider Active NPI

Lucas Readinger, MD

  • Family Medicine Physician
  • Onalaska, WI
National Provider Identifier
1598714933
Registry record updated Feb 2, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
54144 Issued in WI
Practice address
3111 Gundersen Dr
Onalaska, WI 54650-8447
Phone
(608) 775-8100
NPI assigned
May 10, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 2, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 54144 WI Primary
Family Medicine Physician 207Q00000X 47079 MN

Addresses

Primary practice location

3111 Gundersen Dr
Onalaska, WI 54650-8447

Mailing address

1836 South Ave
La Crosse, WI 54601-5429
Phone (608) 782-7300

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
I20100909000519 WI Practitioner - Family Practice 7214947357 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
University of Iowa, RJ & L Carver College of Medicine, 2003
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

3111 Gundersen Dr
Onalaska, WI 54650-8447
Phone (608) 782-7300

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
54144WIMDFamily Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Vernon Memorial Healthcare, Inc Current Accepting new patients
Vernon Memorial Healthcare, Inc. Current Accepting new patients
Gundersen Lutheran Medical Center, Inc CurrentSince May 16, 2022 Accepting new patients
Vernon Memorial Healthcare, Inc. Current Accepting new patients
Vernon Memorial Healthcare, Inc. CurrentSince Aug 1, 2010 Accepting new patients
Vernon Memorial Healthcare, Inc. CurrentSince Aug 1, 2010 Accepting new patients
Gundersen Lutheran Medical Center Inc Current Accepting new patients
Gundersen Lutheran Medical Center, Inc CurrentSince May 16, 2022 Accepting new patients
Gundersen Lutheran Medical Center Inc Past Accepting new patients

Locations

1836 South Ave
La Crosse, WI 54601
Phone (608) 788-8102

1910 South Ave
La Crosse, WI 54601
Phone (608) 775-2287

206 N Mill St
La Farge, WI 54639
Phone (608) 625-2494

3111 Gundersen Dr
Onalaska, WI 54650
Phone (608) 775-8100

102 Sunset Ave
Soldiers Grove, WI 54655
Phone (608) 624-5203

407 S Main St
Viroqua, WI 54665
Phone (608) 637-3195

407 S Main St
Ste 400
Viroqua, WI 54665
Phone (608) 637-3174

507 S Main St
Viroqua, WI 54665
Phone (608) 637-2101

100 Melby St
Westby, WI 54667
Phone (608) 634-3125

Interoperability endpoints

  • Direct secure messaging: lreadinger21946@direct.gundersenhealth.org
  • Direct secure messaging: lreadinger569767@direct.emplifyhealth.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 7

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": "1147219200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1598714933",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1836 SOUTH AVE",
            "city": "LA CROSSE",
            "state": "WI",
            "postal_code": "546015429",
            "telephone_number": "608-782-7300"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3111 GUNDERSEN DR",
            "city": "ONALASKA",
            "state": "WI",
            "postal_code": "546508447",
            "telephone_number": "608-775-8100"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "READINGER",
        "first_name": "LUCAS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-10",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WI",
            "license": "54144",
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "MN",
            "license": "47079",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Onalaska, WI

Sources for this page

Verify at the official NPI Registry.