The present paper provides a diagnostic and treatment overview of geriatric hypochondriasis. It is suggested that our current definition of hypochondriasis may be inadequate in describing the complexity of the disorder and its varied manifestations in the general population and especially in our geriatric population. Attempts by researchers to provide greater diagnostic clarity are reviewed, including the concepts of hypochondriasis as a discrete disorder (primary hypochondriasis) and hypochondriasis as part of a comorbid mix of disorders (secondary hypochondriasis). Diagnostic features of geriatric hypochondriasis are discussed, including comorbidity, prevalence, the relationship of medical illness to hypochondriacal symptomatology, and etiology. Treatment considerations which are reviewed include: the importance of respect for the defenses of the client, the importance of venting and expressions of feeling by the client, the creation of a psychological atmosphere of professional and interpersonal support, and reattribution training. It is suggested that hypochondriasis is a social “communication” and that comorbidity itself may be the key to unlocking the unspoken “messages” of hypochondriacal older adults.