There are more than 20 types of special diseases, broadly including cardiovascular and cerebrovascular diseases, respiratory diseases, digestive diseases, blood diseases, endocrine diseases, mental disorders, and other diseases such as malignant tumors. 1. Cardiovascular and cerebrovascular diseases: coronary heart disease, hypertension, rheumatic heart valve disease, cerebral hemorrhage, cerebral infarction, subarachnoid hemorrhage and other sequelae of cerebrovascular accidents. 2. Respiratory diseases: such as bronchial asthma, chronic bronchitis with obstructive emphysema, chronic pulmonary heart disease. 3. Diseases of digestive system: mainly including hepatitis C, chronic viral hepatitis B. 4. Blood diseases: including hemophilia, aplastic anemia, myeloproliferative disease and other blood diseases. 5. Endocrine diseases: mainly including type I and type II diabetes. 6. Mental disorders: such as schizophrenia, depressive mania, paranoid mental disorder. 7. Others: In addition to the above diseases, tuberculosis, severe prostatic hyperplasia, systemic lupus erythematosus, radiotherapy, chemotherapy, analgesic treatment for malignant tumors, dialysis treatment for patients with renal failure, as well as liver, kidney, heart valve, lung transplantation, and rejection treatment after hematopoietic stem cell transplantation, etc., are also belong to the special disease categories. As there are many types of special diseases, it is recommended to actively seek medical treatment when any abnormality occurs. It should be noted that due to the different health insurance policies in different places, the types of special diseases may vary, and the specific local health insurance policies shall prevail.