A physician sees a patient for asthma complaints and does an office visit (medical history, physical exam and medical decision-making). As part of the MDM, the doctor also does a spirometry test (94010) and determines nebulizer treatment (94640) would improve the patient’s condition. After the nebulizer is given, the patient receives a post-spirometry assessment for the effect of treatment on lung function. Do you bill the pre- and post-spirometry code (94640) instead of 94010?
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