In the outpatient setting, diagnoses documented as uncertain (e.g., “possible,” “probable,” “suspected,” “rule out”) are generally not coded as confirmed conditions; instead, coding is based on confirmed diagnoses or, when not confirmed, the presenting signs/symptoms. Here, the provider documented only “possible Zika,” which is not a confirmed diagnosis for outpatient reporting. Even though the CDI specialist sees a positive serology result, lab data alone does not replace provider diagnostic confirmation in the assessment/plan. The appropriate next step is to query the provider to confirm whether Zika is the established diagnosis based on the positive test (and whether it is clinically addressed during the encounter). If confirmed, Zika can be coded appropriately and sequenced based on the reason for the visit; if not confirmed or still under evaluation, the symptom (fever) remains first-listed. Option B is incorrect because coders do not “code the result” of a serology test as a diagnosis; they code the condition the test supports once clinically confirmed.