Medical improvement expected diary -refers to a case which is scheduled for review at a later date because the individual's impairment(s) is expected to improve. Generally, the diary period is set for not less than 6 months or for not more than 18 months. Examples of cases likely to be scheduled for medical improvement expected diary are fractures and cases in which corrective surgery is planned and recovery can be anticipated.
Permanent impairment-medical improvement not expected- refers to a case in which any medical improvement in a person's impairment(s) is not expected. This means an extremely severe condition determined on the basis of our experience in administering the disability programs to be at least static, but more likely to be progressively disabling either by itself or by reason of impairment complications, and unlikely to improve so as to permit the individual to engage in substantial gainful activity or, if you are a child, unlikely to improve to the point that you will no longer have marked and severe functional limitations. The interaction of the individual's age, impairment consequences and the lack of recent attachment to the labor market may also be considered in determining whether an impairment is permanent. Improvement which is considered temporary under § 416.994(b)(2)(iv)(D) or § 416.994(c)(2)(iv) , as appropriate, will not be considered in deciding if an impairment is permanent. Examples of permanent impairments taken from the list contained in our other written guidelines which are available for public review are as follows and are not intended to be all inclusive:
Nonpermanent impairment -refers to a case in which any medical improvement in the person's impairment(s) is possible. This means an impairment for which improvement cannot be predicted based on current experience and the facts of the particular case but which is not at the level of severity of an impairment that is considered permanent. Examples of nonpermanent impairments are: Regional enteritis, hyperthyroidism, and chronic ulcerative colitis.
Vocational reexamination diary -refers to a case which is scheduled for review at a later date because the individual is undergoing vocational therapy, training or an educational program which may improve his or her ability to work so that the disability or blindness requirement of the law is no longer met. Generally, the diary period will be set for the length of the training, therapy, or program of education.
20 C.F.R. §416.990