The recent and rapid increase of the elderly population in developed nations has heightened the social importance of precise diagnosis and appropriate treatment for idiopathic normal pressure hydrocephalus (iNPH). This chapter reviews various assessment batteries that have been used in iNPH to date. There are many NPH assessing scales, most of which aim to assess level of general activity, severity of respective NPH symptoms, response to interventions such as cerebrospinal fluid (CSF) drainage tests or shunt surgery, and short and long term outcome. Comparative study of the specificity and sensitivity of the neuropsychological tests is necessary to determine the most reliable test for prediction of shunt surgery. The scale consists of the four domains of gait, neuropsychology, balance, and continence. The improvement of cognitive impairment was the major factor in reducing care-giver burden.