Question: The neurologist in our group will only read an EEG when the test is performed at a facility. Our previous coder billed 95819-26 for the reading only. Is this correct?
Answer: You are correct in appending modifier 26 (Professional component) to the procedure code since the neurologist interpreted the diagnostic results and created the written report instead of conducting the actual diagnostic test.
Whether the procedure code being reported is correct depends on an important fact: is the patient awake or asleep during the test? If the patient remains awake during the diagnostic test, report 95816 (Electroencephalogram [EEG]; including recording awake and drowsy). If the patient also has sleep periods during the diagnostic testing, submit 95819 (Electroencephalogram [EEG]; including recording awake and asleep). CPT® codes 95816-95822 include 20 to 40 minutes of recording time.