Other ill-defined and unspecified causes of mortality are diseases and conditions that are not easily classified according to the International Classification of Diseases (ICD). They include cases where the cause of death is unknown, or where the death is due to a combination of causes.
Diagnosis of this category of mortality is difficult due to the lack of specific information on the cause of death. The diagnosis is often based on the medical history, physical examination, and laboratory tests.
Differential diagnosis includes conditions such as infectious diseases, congenital anomalies, metabolic disorders, metabolic syndromes, cardiovascular diseases, and certain cancers.
Treatment is based on the underlying cause and may include lifestyle modifications, medications, and/or surgery.
The prognosis for other ill-defined and unspecified causes of mortality depends on the underlying cause. In some cases, the cause may be reversible, while in other cases, the cause is terminal.