Spirometry is widely used across various medical specialties to assess and monitor lung function. Pulmonologists rely on it to diagnose and manage conditions like asthma and COPD, while internists use it to evaluate unexplained respiratory symptoms. Cardiologists may use spirometry to understand the effects of cardiovascular conditions on the lungs, and allergists monitor asthma and other allergic respiratory issues. Additionally, occupational medicine specialists use it to track lung health in workers exposed to respiratory hazards. This versatile tool helps provide critical insights into respiratory health across multiple fields.