Stephen John Hassig, MD, MBA

Primary specialty

Urology PhysicianTaxonomy code 208800000X

License

87292-20 Issued in WI

Practice address

600 Highland Ave
Madison, WI 53792-0001

Phone

(608) 914-0200

NPI assigned

Apr 20, 2020

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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.

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Business Administration, Doctor of Medicine

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

{
    "created_epoch": "1587340800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782777600000",
    "number": "1265052344",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7974 UW HEALTH CT",
            "city": "MIDDLETON",
            "state": "WI",
            "postal_code": "535625531"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-914-0200"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "601 Elmwood Ave",
            "address_purpose": "LOCATION",
            "city": "Rochester",
            "state": "NY",
            "postal_code": "146420001",
            "country_code": "US",
            "telephone_number": "585-275-4786",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HASSIG",
        "first_name": "STEPHEN",
        "middle_name": "JOHN",
        "name_prefix": "Dr.",
        "credential": "MD, MBA",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2020-04-20",
        "last_updated": "2026-06-30",
        "certification_date": "2026-06-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "WI",
            "license": "87292-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michelle Lousie Hass
• Timothy Hass, MS
• Ayan Hassan, RN
• Meymun Ali Hassan, PHARMD
• Beth Hasselbacher
• Rafael Hastey, M.D.
• Mary H Hastings, PT
• Christopher P Hastreiter
• Jacob Brian Hatch, PHARM.D.
• Leah Ruth Hatcher, CPM, LM

• Urology Physician in Madison, WI
• Providers in Madison, WI by specialty
• Urology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 30, 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.