Patient presents with acute abdomen characterized by severe, generalized abdominal pain, consistent with perforated viscus.  Onset of pain was sudden and described as sharp, stabbing, or tearing.  Symptoms include abdominal rigidity, guarding, rebound tenderness, and diminished or absent bowel sounds, indicative of peritonitis.  Patient exhibits signs of systemic inflammatory response syndrome (SIRS), including tachycardia, tachypnea, fever, and leukocytosis.  Medical history is significant for (insert relevant past medical history, e.g., peptic ulcer disease, diverticulitis, recent abdominal surgery, trauma).  Differential diagnosis includes acute appendicitis, bowel obstruction, mesenteric ischemia, and other causes of acute abdomen.  Computed tomography (CT) scan of the abdomen and pelvis with intravenous contrast demonstrates (insert specific CT findings, e.g., free air under the diaphragm, free fluid, extraluminal air or contrast).  Surgical consultation obtained.  Patient is being prepared for emergent exploratory laparotomy for suspected gastrointestinal perforation.  Treatment plan includes fluid resuscitation, broad-spectrum antibiotics, and pain management.  Diagnosis: Perforated viscus.  ICD-10 code: (insert appropriate ICD-10 code, e.g., K63.2 for Gastrointestinal perforation).  Current Procedural Terminology (CPT) codes will be documented upon completion of surgical intervention.