Gregory Allen Kass, M.D.

Primary specialty

Diagnostic Radiology PhysicianTaxonomy code 2085R0202X

License

29928-020 Issued in WI

Practice address

725 American Ave
Waukesha, WI 53188-5031

Phone

(262) 928-2400

Fax

(262) 928-7621

NPI assigned

Sep 20, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gkass14660@direct.phci.org

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.

• Radiology Waukesha S.C.

  • Diagnostic Radiology Physician
  • Waukesha, WI
  • NPI 1730175258
  Medicare reassignment NPD
• Prohealth Medical Group Inc

  • Family Medicine Physician
  • Waukesha, WI
  • NPI 1790720613
  NPD (past)

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

{
    "created_epoch": "1127174400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1063407666",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "725 AMERICAN AVE",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531885031",
            "telephone_number": "262-928-2400",
            "fax_number": "262-928-7621"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "725 AMERICAN AVE",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531885031",
            "telephone_number": "262-928-2400",
            "fax_number": "262-928-7621"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KASS",
        "first_name": "GREGORY",
        "middle_name": "ALLEN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-20",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "WI",
            "license": "29928-020",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "31524200",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Mary K Karkow, DDS
• Berkley Ann Karow
• Faith Kasbohm
• Heather Kasmarek, RDH
• Edward G Kass, MD
• Emily Kassens
• Carrie Kassner, RDH
• Kristin T Kastner, NP
• Christopher Kasun, SAC-IT
• Nicole Katcha, APNP

• Diagnostic Radiology Physician in Waukesha, WI
• Providers in Waukesha, WI by specialty
• Diagnostic Radiology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.