In reviewing our superbills to reflect the 2008 changes in ICD-9 and CPT codes questions have been raised in regards to nebulizer treatments and peak flows. We have been told that peak flows are part of the E/M visit. We have been applying CPT 94010 to this. As for patients who receive a nebulizer treatment during their appt, we have been attaching CPT code 94664 to the service. We have been told that this is incorrect. Would CPT code 94640 be more accurate?