Question: Our physiatrist documented SSEP for back pain in a patient's chart. Is there a code for SSEP? Las Vegas Subscriber Answer: You should report the 95925-95927 series for short-latency somatosensory evoked potential studies (also known as SSEPs or SEPs), depending on the location of the study: According to the April 2002 CPT Assistant, "SEPs study codes are defined as bilateral studies. A unilateral study using codes 95925, 95926, or 95927 should be reported with modifier -52 (Reduced services) appended."