NPIMap

Individual provider Active NPI

Walter G Kao, MD

  • Cardiovascular Disease Physician
  • Madison, WI
National Provider Identifier
1457328940
Registry record updated Apr 14, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Cardiovascular Disease PhysicianTaxonomy code 207RC0000X
License
47856 Issued in WI
Practice address
700 S Park St
Madison, WI 53715
Phone
(608) 260-2900
Fax
(608) 260-2967
NPI assigned
Mar 2, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 14, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Cardiovascular Disease Physician 207RC0000X 47856 WI Primary

Addresses

Primary practice location

700 S Park St
Madison, WI 53715

Mailing address

700 S Park St
Madison, WI 53715-1830
Phone (608) 260-2900

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
I20050330000756 WI Practitioner - Cardiovascular Disease (Cardiology)Practitioner - Advanced Heart Failure and Transplant Cardiology 4981662350 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Advanced Heart Failure and Transplant Cardiology
Education
JS Weill Medical College, Cornell University, 1984
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Aspirus Medical Group, Inc.Group PAC ID 1052223625, shared by 3 NPIs, 272 clinicians
Divine Savior Healthcare IncGroup PAC ID 5799684007, shared by 4 NPIs, 135 clinicians
Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc.Group PAC ID 9335059856, shared by 17 NPIs, 566 clinicians

Practice addresses (Care Compare)

2817 New Pinery Rd
Portage, WI 53901-9240
Phone (715) 847-2812

824 Illinois Ave
Stevens Point, WI 54481-3112
Phone (715) 344-1600

Hospital & facility affiliations

  • Aspirus Riverview Hospital & Clinics Inc Hospital, Wisconsin Rapids, WI, CCN 520033
  • Aspirus Stevens Point Hospital & Clinics, Inc. Hospital, Stevens Point, WI, CCN 520002
  • Aspirus Divine Savior Hospital Hospital, Portage, WI, CCN 520041
  • Aspirus Wausau Hospital Hospital, Wausau, WI, CCN 520030

Merit-based Incentive Payment System (MIPS)

Final score
87.53 of 100Reported as group
Quality
77.62
Promoting interoperability
100
Improvement activities
40
Cost
78.08

Merit-based Incentive Payment System (MIPS)

Final score
91.7 of 100Reported as group
Quality
91.14
Promoting interoperability
100
Improvement activities
40
Cost
77.5

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
47856WIMDCardiovascular Disease Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. CurrentSince Mar 21, 2022 Accepting new patients
Divine Savior Healthcare, Inc. CurrentSince Oct 1, 2021 Accepting new patients
Aspirus Stevens Point Hospital & Clinics, Inc. CurrentSince Feb 12, 2020 Accepting new patients
Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. CurrentSince Mar 21, 2022 Accepting new patients
Divine Savior Healthcare, Inc. CurrentSince Oct 1, 2021 Accepting new patients
Aspirus Medical Group, Inc. Current Accepting new patients
Aspirus Medical Group, Inc. CurrentSince Dec 30, 2021 Accepting new patients
Aspirus Stevens Point Hospital & Clinics, Inc. CurrentSince Feb 12, 2020 Accepting new patients
Aspirus Medical Group, Inc. CurrentSince Dec 30, 2021 Accepting new patients
Cardiovascular Associates of Southeaster Pennsylvania PC Cardiovascular Disease Past Accepting new patients
Aspirus Medical Group, Inc. Past Accepting new patients

Locations

29980 Network Pl
Chicago, IL 60673

400 W Glen St
Crandon, WI 54520
Phone (715) 478-3318

2817 New Pinery Rd
Portage, WI 53901
Phone (608) 745-4598

2251 N Shore Dr
Ste 100
Rhinelander, WI 54501
Phone (715) 361-2074

2275 N Shore Dr
Rhinelander, WI 54501
Phone (715) 361-3000

900 Illinois Ave
Stevens Point, WI 54481
Phone (715) 342-7500

824 Illinois Ave
Stevens Point, WI 54481
Phone (715) 342-7500

401 W Mohawk Dr
Ste 100
Tomahawk, WI 54487
Phone (715) 453-7700

1821 N 4th Ave
Wausau, WI 54401
Phone (715) 675-9451

3301 Cranberry Blvd
Weston, WI 54476
Phone (715) 393-2100

4005 Community Center Dr
Weston, WI 54476
Phone (715) 241-5400

Interoperability endpoints

  • Direct secure messaging: wkao17870@direct.aspirus.org

Organizations & group practices 12

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 15

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

View all 15

NPI Registry JSON

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

{
    "created_epoch": "1141257600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776124800000",
    "number": "1457328940",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "700 S PARK ST",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537151830",
            "telephone_number": "608-260-2900",
            "fax_number": "608-260-2956"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "700 S PARK ST",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "53715",
            "telephone_number": "608-260-2900",
            "fax_number": "608-260-2967"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KAO",
        "first_name": "WALTER",
        "middle_name": "G",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-03-02",
        "last_updated": "2026-04-14",
        "certification_date": "2026-04-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "WI",
            "license": "47856",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Madison, WI

Sources for this page

Verify at the official NPI Registry.