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August 18, 2017


Reinsurance in Health Insurance


Reinsurance, also known as insurance for insurers, is a
mechanism aimed at reducing an insurer's financial liability
associated with unexpectedly high health care costs. The
availability of reinsurance may be one of many factors an
insurer considers in assessing potential exposure to loss in a
certain market. This may affect whether or not to enter a
market, what types of products to offer, and how premiums
are set. Reinsurance may be structured and funded in a
variety of ways. The potential impact of reinsurance on
health insurance premiums is highly dependent on the
amount of funds available for reinsurance as well as
whether the program is funded internally or externally.


The concept underlying insurance is risk (i.e., the likelihood
and magnitude of financial loss). In any type of insurance
arrangement, all parties seek to manage their risk, subject to
certain objectives (e.g., coverage and/or profit goals). In
health insurance, consumers (patients as insurance
beneficiaries) and insurers (as providers or sellers of
insurance) approach the management of insurance risk
differently. From the consumer's point of view, a person (or
family) buys health insurance to protect against financial
losses resulting from the unpredictable use of potentially
high-cost medical care. The insurer employs a variety of
methods to manage the risk it takes on when providing
health coverage to consumers, to assure that the insurer
operates a viable business (e.g., balancing premiums against
the collective risk of the covered population). The insurer
uses these methods when pooling risk so that premiums
collected from all enrollees generally are sufficient to fund
claims (plus administrative expenses and profits).

Sometimes, however, even with the variety of methods an
insurer may employ to manage risk, the risk taken on by the
insurer may not be sufficient to protect against the chosen
risk management strategies. For example, a single health
insurance company may be unable to cover a catastrophic
loss. To limit their risk exposure, insurers often transfer
some of their liability or risk to another insurer, a
reinsurance company. That is, just as an insurer pools the
risk of its covered consumers, a portion of that risk gets
further spread to other insurance companies, known as
reinsurers.


Reinsurance, thus, is an extension of insurance and further
acts as a risk transfer and risk spreading mechanism.
Reinsurance works by spreading the costs associated with
high-cost incidents across insurers. Insurers often purchase
reinsurance for four reasons:

    1. To limit liability on specific risks. That is,
        reinsurance allows insurers to offer


        coverage limits higher than they
        otherwise might. This is particularly
        useful for smaller insurers (where risk is
        spread among fewer enrollees), allowing
        them to compete with larger insurers.
    2. To stabilize loss experience. A unique
        feature of insurance is that actual costs
        associated with enrollees is not known
        until sometime in the future. Reinsurance
        stabilizes fluctuations in an insurer's loss
        experience, particularly those associated
        with high-cost enrollees.
    3. To protect against catastrophes. An
        insurer may experience a catastrophic loss
        due to a one-time event (e.g.,
        expenditures associated with a natural
        disaster). Through reinsurance, insurers
        can reduce any fluctuations in their loss
        experience.
    4. To increase capacity. That is, reinsurance
        allows an insurer to assume a larger
        overall capacity of risk than it may
        otherwise be able to.

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Reinsurance may be structured in a variety of ways
depending on the insurer's need and can range from simple
to complex. Generally, however, a reinsurance contract
either may be a broad agreement covering some portion of
the business or may cover a specific risk.

Reinsurance may also be funded using a variety of methods.
Reinsurance can be funded by internal resources; this may
include insurers assessing a surcharge on premiums or
insurers voluntarily purchasing reinsurance from a
reinsurance company. Reinsurance can also be externally
funded; this may include the government appropriating
funds for reinsurance. Reinsurance can also be funded
through a combination of internal and external funding. An
example of this combination mechanism may include all
insurers being assessed a reinsurance charge, but only
certain insurers being eligible for reinsurance payments.

The reinsurance arrangement typically involves various
payment parameters. Generally, in order for a health insurer
to receive a reinsurance payment, an enrollee's total claims
costs must exceed a specified level (referred to as the
attachment point; see Figure 1). The insurer is then paid a
portion of the claims costs (referred to as the coinsurance
rate) beyond the attachment point until total claims costs
reach a cap (referred to as the reinsurance cap; see Figure
1).


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