There is some controversy over who exactly should take responsibility for coordinating the care of the dual eligibles. There have been some proposals to transfer dual eligibles into existing Medicaid managed care plans, which are controlled by individual states.[146] But many states facing severe budget shortfalls might have some incentive to stint on necessary care or otherwise shift costs to enrollees and their families to capture some Medicaid savings. Medicare has more experience managing the care of older adults, and is already expanding coordinated care programs under the ACA,[147] though there are some questions about private Medicare plans' capacity to manage care and achieve meaningful cost savings.[148]

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The dual-eligible population comprises roughly 20 percent of Medicare's enrollees but accounts for 36 percent of its costs.[142] There is substantial evidence that these individuals receive highly inefficient care because responsibility for their care is split between the Medicare and Medicaid programs[143]—most see a number of different providers without any kind of mechanism to coordinate their care, and they face high rates of potentially preventable hospitalizations.[144] Because Medicaid and Medicare cover different aspects of health care, both have a financial incentive to shunt patients into care the other program pays for.
Part A covers inpatient hospital stays where the beneficiary has been formally admitted to the hospital, including semi-private room, food, and tests. As of January 1, 2018, Medicare Part A has an inpatient hospital deductible of $1340, coinsurance per day as $335 after 61 days confinement within one "spell of illness", coinsurance for "lifetime reserve days" (essentially, days 91-150) of $670 per day, and coinsurance in an Skilled Nursing Facility (following a medically necessary hospital confinement of 3 night in row or more) for days 21-100 of $167.50 per day (up to 20 days of SNF confinement have no co-pay) These amounts increase or decrease yearly on 1st day of the year.[citation needed]
The Patient Protection and Affordable Care Act ("PPACA") of 2010 made a number of changes to the Medicare program. Several provisions of the law were designed to reduce the cost of Medicare. The most substantial provisions slowed the growth rate of payments to hospitals and skilled nursing facilities under Parts A of Medicare, through a variety of methods (e.g., arbitrary percentage cuts, penalties for readmissions).

Like other types of health insurance, each Medicare Advantage plan has different rules about coverage for treatment, patient responsibility, costs and more. Joining a Medicare Advantage plan may make someone ineligible to continue receiving health care coverage through their employer or union, so if employer-based coverage fits a consumer's needs, they may want to hold off on enrolling in Medicare.
Minnesota is one of just three states in the country (Massachusetts and Wisconsin are the others) that offers its own version of Medicare Supplement insurance. Minnesota has two plans available: the Minnesota Basic Plan and the Minnesota Extended Basic Plan. In  most other states, up to 10 types of standardized plans are available. Medicare Supplement plans are also known as Medigap policies and may help pay Original Medicare out-of-pocket costs, such as copayments and deductibles.

If you are uninsured and are not eligible for Medi-Cal or a plan through Covered California, you may qualify for limited health services offered by your county. These programs are not insurance plans and do not provide full coverage. County health programs are commonly known as “county indigent health” or programs “medically indigent adult” programs.

Hospice benefits are also provided under Part A of Medicare for terminally ill persons with less than six months to live, as determined by the patient's physician. The terminally ill person must sign a statement that hospice care has been chosen over other Medicare-covered benefits, (e.g. assisted living or hospital care).[38] Treatment provided includes pharmaceutical products for symptom control and pain relief as well as other services not otherwise covered by Medicare such as grief counseling. Hospice is covered 100% with no co-pay or deductible by Medicare Part A except that patients are responsible for a copay for outpatient drugs and respite care, if needed.[39]
The maximum length of stay that Medicare Part A covers in a hospital inpatient stay or series of stays is typically 90 days. The first 60 days would be paid by Medicare in full, except one copay (also and more commonly referred to as a "deductible") at the beginning of the 60 days of $1340 as of 2018. Days 61–90 require a co-payment of $335 per day as of 2018. The beneficiary is also allocated "lifetime reserve days" that can be used after 90 days. These lifetime reserve days require a copayment of $670 per day as of 2018, and the beneficiary can only use a total of 60 of these days throughout their lifetime.[24] A new pool of 90 hospital days, with new copays of $1340 in 2018 and $335 per day for days 61–90, starts only after the beneficiary has 60 days continuously with no payment from Medicare for hospital or Skilled Nursing Facility confinement.[25]
When you apply for Medicare, you can sign up for Part A (Hospital Insurance) and Part B (Medical Insurance). Because you must pay a premium for Part B coverage, you can turn it down. However, if you decide to enroll in Part B later on, you may have to pay a late enrollment penalty for as long as you have Part B coverage. Your monthly premium will go up 10 percent for each 12-month period you were eligible for Part B, but didn’t sign up for it, unless you qualify for a special enrollment period.