Mother had active HSV 1 (location of HSV was on mothers mons pubis) and delivered via C-section. Newborn had HSV testing done and was all negative. What DX codes would you assign for the newborn claim? z38.01 as the primary and I'm struggling with the secondary codes, if to assign p00.89, or p00.2 or z20.828 since newborn doesn't have HSV, just tested prophylactically. What's the difference between "affected by" or "contact with suspected exposure"?