Underinsured motorist insurance
Underinsured motorist insurance means insurance under which the policyholder's level of protection against losses caused by another is extended to compensate for inadequate coverage in the other party's policy or plan.
Source
42 CFR § 411.50
Scoping language
Limits on applicability. The provisions of this subpart C do not apply to any services required because of accidents that occurred before December 5, 1980.