Assign the Appropriate ICD-9-CM Diagnoses for the Following Outpatient Scenario $^\circ$

Essay

Assign the appropriate ICD-9-CM diagnoses for the following outpatient scenario:
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Patient presents with abdominal pain, duration of 7 days, increasing in severity. Patient awoke this morning with temperature of 104.1 $^\circ$ F along with nausea and chills. Workup in emergency department (ED) was negative for appendicitis and gallbladder disease. Will prescribe pain meds and work up further as an outpatient for the possibility of gastritis.