Jimmo and the improvement standard: implementing Medicare coverage through regulations, policy manuals and other guidance.

In Jimmo v. Sebelius, the plaintiffs alleged that the Centers for Medicare and Medicaid Services (CMS) regularly and improperly denied Medicare reimbursement for outpatient therapy treatment when the beneficiary did not show a likelihood of improvement. These denials, based on policy manuals and other guidance, appear to contradict the government's own regulations, which specifically prohibit coverage denials based solely on the so-called "Improvement Standard.