A form of malpractice insurance gaining increasing popularity among insurers because it increases the accuracy of ratemaking. In this type of policy the insured is covered for any claim made, rather than injury occurring, while the policy is in force. Claims made after the insurance lapses are not covered as they are by a claims incurred policy. This type of policy was initially resisted by providers because of the nature of medical malpractice claims, which may arise several years after an injury occurs. A retired physician, for example could be sued and not covered, unless special provisions are made to continue his coverage beyond his years of practice. There are also retrospective problems for providers who switch from a conventional policy to a claims made policy, since the latter policy would not cover claims arising from events occurring during the years when the conventional policy was in effect. Insures marketing such policies are now offering providers the opportunity to purchase insurance for both contingencies.