The cost of a lung function test depends on the specific program. For a routine small lung function, the price is$100-200, while for a large lung function, including a maximum ventilation test, the price is$204 if the program is more complete. For bronchial asthma, chronic or allergic cough, bronchitis, etc., the lung function test also needs to add a nitric oxide measurement, which is very helpful in determining coughing asthma or bronchial asthma, and determining the hyperresponsiveness of the airways, which costs around$140. There is also a diastolic test of the bronchial tubes, or a bronchial provocation test, which may cost around$100 each. For a more comprehensive test of lung function, the price is around$300-400. In addition, lung function tests are priced according to the level of the hospital, so the price may vary in different hospitals, and it is recommended to go to a regular hospital for the appropriate tests. Some county hospitals may not have carried out the test yet, but it will be carried out one by one, because the test is very helpful to the clinic.