CPT® Code 94645

Add-On Code

Continuous inhalation treatment with aerosol medication for acute airway obstruction; each additional hour (List separately in addition to code for primary procedure)

The CPT® Code 94645 refers to the provision of continuous inhalation treatment with aerosol medication specifically for acute airway obstruction, billed for each additional hour of treatment. This procedure is commonly known as continuous bronchodilator therapy (CBT). During this treatment, a patient receives a bronchodilator medication that is aerosolized, meaning it is converted into fine particles suspended in a gaseous propellant. When the aerosol pressure is released, the medication is inhaled into the lungs as a fine spray. The primary action of the bronchodilator is to relax the smooth muscle surrounding the bronchioles and lung tissue, which may become constricted during episodes of acute airway obstruction, such as those experienced during an asthma attack or hypersensitivity reaction. This constriction can severely limit airflow, making it critical to administer the medication effectively. Throughout the treatment, healthcare providers perform periodic assessments to monitor the patient's response to the medication, adjusting the dosage as necessary to achieve the desired therapeutic effect. Once the symptoms indicating acute airway obstruction have resolved, the inhalation treatment is typically discontinued. It is important to note that CPT® Code 94644 should be used for the initial hour of continuous inhalation treatment, while CPT® Code 94645 is designated for each additional hour of treatment provided.