Memorial Hermann Accountable Care Organization v. CIR, No. 23-60608 (5th Cir. 2024)
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Memorial Hermann Accountable Care Organization (MHACO), a nonprofit corporation formed under Texas law in 2012, participated in the Medicare Shared Savings Program (MSSP) as an accountable care organization (ACO). ACOs are groups of healthcare providers that manage and coordinate care for Medicare beneficiaries, potentially sharing in cost savings achieved for the Medicare program. MHACO's patient population includes those covered by MSSP, Medicare Advantage Plans, and employer-sponsored health plans, but it does not provide services for uninsured individuals. The proportion of MHACO’s revenue from MSSP activities varies annually.
The Internal Revenue Service (IRS) issued a proposed adverse determination letter, concluding that MHACO did not qualify for a tax exemption under I.R.C. § 501(c)(4). The IRS Independent Office of Appeals upheld this determination, stating that MHACO was not organized and operated for promoting social welfare and providing community benefit. MHACO petitioned the United States Tax Court for a declaratory judgment, which upheld the IRS’s determination, finding that MHACO’s non-MSSP activities primarily benefited its commercial payor and healthcare provider participants rather than the public. MHACO’s motions to vacate or revise the judgment were denied, leading to this appeal.
The United States Court of Appeals for the Fifth Circuit reviewed the case. The court affirmed the tax court’s judgment, holding that MHACO did not qualify for a § 501(c)(4) tax exemption. The court applied the "substantial nonexempt purpose" test, consistent with the Supreme Court's interpretation in Better Business Bureau of Washington, D.C. v. United States, and found that MHACO’s commercial activities constituted a substantial nonexempt purpose. The court concluded that MHACO’s operations did not exclusively promote social welfare, as required by § 501(c)(4).
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