President Harry S. Truman proposed a system of public health insurance in his November 19, 1945, address. He envisioned a national system that would be open to all Americans, but would remain optional. Participants would pay monthly fees into the plan, which would cover the cost of any and all medical expenses that arose in a time of need. The government would pay for the cost of services rendered by any doctor who chose to join the program. In addition, the insurance plan would give cash to the policy holder to replace wages lost because of illness or injury. The proposal was quite popular with the public, but it was fiercely opposed by the Chamber of Commerce, the American Hospital Association, and the AMA, which denounced it as "socialism".[25]
Disability income (DI) insurance pays benefits to individuals who become unable to work because of injury or illness. DI insurance replaces income lost while the policyholder is unable to work during a period of disability (in contrast to medical expense insurance, which pays for the cost of medical care).[123] For most working age adults, the risk of disability is greater than the risk of premature death, and the resulting reduction in lifetime earnings can be significant. Private disability insurance is sold on both a group and an individual basis. Policies may be designed to cover long-term disabilities (LTD coverage) or short-term disabilities (STD coverage).[124] Business owners can also purchase disability overhead insurance to cover the overhead expenses of their business while they are unable to work.[125]
^ e.g. House Bill H.R.3962 Section 322 (b)2(B) "AMORTIZATION OF START-UP FUNDING- The Secretary shall provide for the repayment of the startup funding provided under subparagraph (A) to the Treasury in an amortized manner over the 10-year period beginning with Y1". The Senate HLP Committee bill contains a similar clause in § 3106 "A Health Benefit Plan Start-up Fund will be created to provide loans for initial operations, which the plan will be required to pay back no later than 10 years after the payment is made."
Before the development of medical expense insurance, patients were expected to pay all other health care costs out of their own pockets, under what is known as the fee-for-service business model. During the middle to late 20th century, traditional disability insurance evolved into modern health insurance programs. Today, most comprehensive private health insurance programs cover the cost of routine, preventive, and emergency health care procedures, and also most prescription drugs, but this was not always the case. The rise of private insurance was accompanied by the gradual expansion of public insurance programs for those who could not acquire coverage through the market.
HMO (Health Maintenance Organization) - Offers healthcare services only with specific HMO providers. Under an HMO plan, you might have to choose a primary care doctor. This doctor will be your main healthcare provider. The doctor will refer you to other HMO specialists when needed. Services from providers outside the HMO plan are hardly ever covered except for emergencies. 

In addition to medical expense insurance, "health insurance" may also refer to insurance covering disability or long-term nursing or custodial care needs. Different health insurance provides different levels of financial protection and the scope of coverage can vary widely, with more than 40% of insured individuals reporting that their plans do not adequately meet their needs as of 2007.[2]

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