Individual provider Active NPI

Leah G Irish, CRNA

  • Certified Registered Nurse Anesthetist
  • Winona, MN
National Provider Identifier
1104403807
Registry record updated Dec 10, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Certified Registered Nurse AnesthetistTaxonomy code 367500000X
License
2864 Issued in MN
Practice address
855 Mankato Ave
Winona, MN 55987-4868
Phone
(507) 454-3650
NPI assigned
Mar 27, 2021
Last updated
Dec 10, 2025By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 10, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Certified Registered Nurse Anesthetist 367500000X 16254-33 WI
Certified Registered Nurse Anesthetist 367500000X 2864 MN Primary

Addresses

Primary practice location

855 Mankato Ave
Winona, MN 55987-4868

Mailing address

2522 English Bench Rd
Dorchester, IA 52140-7542
Phone (563) 379-1035

Other practice location 1

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

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MN, WI2 enrollments

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20230918004122 MN Practitioner - Certified Registered Nurse Anesthetist (Crna) 5193189546 Reassigns benefits to 2 organizations
I20251220000142 WI Practitioner - Certified Registered Nurse Anesthetist (Crna) 5193189546 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Certified Registered Nurse Anesthetist (Crna)
Education
Other, 2023
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Gundersen Lutheran Medical Center IncGroup PAC ID 2163331414, shared by 16 NPIs, 888 clinicians
Winona Health ServicesGroup PAC ID 8527977420, 160 clinicians

Practice addresses (Care Compare)

1122 W Hwy 61
Winona, MN 55987-1957
Phone (507) 615-0600

1910 S Ave
La Crosse, WI 54601-5467
Phone (608) 782-7300

855 Mankato Ave
Winona, MN 55987-4868
Phone (507) 454-3650

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
2864MNMDCertified Registered Nurse Anesthetist
16254-33WIMDCertified Registered Nurse Anesthetist

Practice roles

OrganizationSpecialtyStatusNew patients
Winona Health Services CurrentSince Aug 15, 2023 Accepting new patients
Gundersen Lutheran Medical Center Inc CurrentSince Jan 5, 2026 Accepting new patients
Gundersen Lutheran Medical Center, Inc CurrentSince Jan 5, 2026 Accepting new patients
Gundersen Lutheran Medical Center Inc CurrentSince Jan 5, 2026 Accepting new patients
Gundersen Lutheran Medical Center Inc Past Accepting new patients

Locations

1122 W Highway 61
Winona, MN 55987
Phone (507) 615-0600

855 Mankato Ave
Winona, MN 55987
Phone (507) 454-3680

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

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

Organizations & group practices 6

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

Hospital & facility affiliations 8

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": "1616803200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765324800000",
    "number": "1104403807",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2522 ENGLISH BENCH RD",
            "city": "DORCHESTER",
            "state": "IA",
            "postal_code": "521407542",
            "telephone_number": "563-379-1035"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "855 MANKATO AVE",
            "city": "WINONA",
            "state": "MN",
            "postal_code": "559874868",
            "telephone_number": "507-454-3650"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1836 South Ave",
            "address_purpose": "LOCATION",
            "city": "LA Crosse",
            "state": "WI",
            "postal_code": "546015429",
            "country_code": "US",
            "telephone_number": "608-782-7300",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "IRISH",
        "first_name": "LEAH",
        "middle_name": "G",
        "credential": "CRNA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-03-27",
        "last_updated": "2025-12-10",
        "certification_date": "2025-12-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "WI",
            "license": "16254-33",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MN",
            "license": "2864",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Winona, MN

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 10, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • 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.