A 25-year-old male is seen for the first time at the office. patient complains of low back pain. the physician documents the low back pain has been intermittent over the past week and localized to lumbar region with no radiation to the lower extremities. there is no visual deformity seen and the final diagnosis is a lumbar strain. physician prescribes flexeril 10mg along with rest and use of ice and heat packs what is e/m cpt code