Medical Billing Services in Wisconsin.
Wisconsin’s Medicaid program—BadgerCare Plus—is notable for being the only non-expansion state that has eliminated its coverage gap, providing Medicaid to all low-income adults below 100% FPL regardless of family status. This creates a larger-than-expected Medicaid population for a non-expansion state, with approximately 1.2 million enrollees as of late 2024. Happy Billing helps Wisconsin providers navigate the ForwardHealth portal, BadgerCare HMO contracting, and the billing requirements of major systems including Froedtert ThedaCare Health, Aurora Health Care (Advocate Health), and UW Health.
BadgerCare Plus (Wisconsin Medicaid) Billing
BadgerCare Plus is administered by the Wisconsin Department of Health Services (DHS) and processed through the ForwardHealth system. Total enrollment peaked at 1.68 million in May 2023 before declining to approximately 1.2 million by late 2024 following the post-pandemic unwinding process. Wisconsin is unique among non-expansion states: it covers childless adults with incomes at or below 100% FPL, making it the only non-expansion state without a coverage gap. Nearly 198,000 non-disabled childless adults were enrolled as of January 2025. Children are eligible up to 300% FPL (effective threshold: 306% FPL).
BadgerCare Plus Program Structure
Where BadgerCare Plus HMOs are available, members are enrolled in managed care. In areas without HMO access, services are reimbursed on a fee-for-service basis. HMO plans in Wisconsin include Molina Healthcare, UnitedHealthcare Community Plan, and others depending on county. Quartz Health (for certain counties) includes network access to Advocate Aurora Health, Gundersen Health System, and UW Health. The ForwardHealth portal is the primary interface for eligibility verification, prior authorizations, and claim submission. EDI 837 transactions are supported.
Key BadgerCare Plus Billing Requirements
- ForwardHealth portal required for eligibility checks, prior authorizations, and claim status inquiries
- HMO-based managed care in populated counties; fee-for-service in rural/non-HMO counties—verify county-level coverage before billing
- NCCI edits apply; providers should reference ForwardHealth billing guidelines for modifier requirements
- Prenatal Care Coordination is a covered Medicaid benefit for pregnant members—additional billing codes apply
- School-Based Services (SBS) billable to Medicaid when medically necessary—specific documentation requirements
- BadgerCare Plus 1115 waiver (BadgerCare Reform Demonstration) for childless adults; work requirement implementation pending federal approval
- Prior authorization requirements vary by HMO—providers must verify with each plan
Major Wisconsin Health Systems: Billing Landscape
Wisconsin’s hospital market is one of the most highly consolidated and highest-priced in the country, with commercial payers paying 369–392% of Medicare rates at major systems. Three systems—Froedtert ThedaCare, Aurora Health Care (Advocate Health), and UW Health—dominate the market and have the largest impact on provider contracting and billing strategy.
Froedtert ThedaCare Health
Formed on January 1, 2024 through the merger of Milwaukee-based Froedtert Health and Neenah-based ThedaCare, Froedtert ThedaCare Health is Wisconsin’s largest health system by net patient revenue at $4.39 billion. The system includes 18 hospitals and is partnered with the Medical College of Wisconsin, making it the only academic medical center in eastern Wisconsin. Froedtert Hospital in Milwaukee is the primary tertiary and quaternary care facility. Providers credentialing with Froedtert ThedaCare must navigate separate legacy credentialing pipelines for the two former systems as integration continues.
Aurora Health Care (Advocate Health)
Aurora Health Care is Wisconsin’s second-largest IDN with $4.34 billion in net patient revenue. It is the Wisconsin operating arm of Advocate Health—the fifth-largest nonprofit health system in the U.S. with $27 billion in annual revenue—formed through the 2022 merger of Advocate Aurora Health and Atrium Health. Aurora operates 19 hospitals concentrated in eastern Wisconsin and northern Illinois. Aurora accepts BadgerCare Plus and participates in multiple Wisconsin HMO networks.
UW Health
UW Health is the integrated health system of the University of Wisconsin-Madison with $3.4 billion in net patient revenue. As an academic medical center affiliated with the UW School of Medicine and Public Health, UW Health provides specialized tertiary and quaternary care with particular strength in transplant, cancer, and neurosciences. UW Health is the state’s second academic medical center alongside Froedtert/Medical College of Wisconsin. The system is a key payer network participant in the Madison/Dane County HMO market.
Specialties We Serve in Wisconsin
Each specialty page dives into the specific billing challenges and our approach. Visit our Specialties to explore the one most relevant to your practice.
Why Wisconsin Providers Choose Happy Billing
- ForwardHealth portal expertise for BadgerCare Plus fee-for-service and HMO billing
- County-level HMO enrollment verification built into eligibility workflows
- Credentialing with Molina, UnitedHealthcare, and Wisconsin HMO network plans
- Froedtert ThedaCare, Aurora, and UW Health network participation and billing experience
- Prenatal Care Coordination and School-Based Services documentation support
- Rural fee-for-service billing for non-HMO counties across Wisconsin
Wisconsin Medical Billing FAQs
Does Wisconsin have Medicaid expansion under the ACA?
Wisconsin has not formally expanded Medicaid under the ACA. However, it uniquely covers all non-elderly adults with household incomes at or below 100% FPL through its BadgerCare Plus 1115 waiver—including childless adults not eligible for Medicaid in other non-expansion states. Those above 100% FPL receive ACA marketplace subsidies. Wisconsin is the only non-expansion state without a coverage gap.