Class A drugs refer to drugs that are basically unified in the whole country, can meet the basic needs of clinical treatment, are widely used, have good curative effect, and have lower prices among similar drugs. The expenses of such drugs are included in the payment scope of the basic medical insurance fund and paid according to the basic medical insurance payment standard.

Class B drugs refer to drugs that can be used clinically and have good curative effect. The price of similar drugs is slightly higher than that of Class A drugs, and the basic medical insurance fund has the ability to pay part of the expenses. Such drugs are paid by employees according to a certain proportion (20% in China), and then included in the basic medical insurance fund, and the expenses are paid according to the basic medical insurance payment standard.

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