I71.3

Abdominal aortic aneurysm, ruptured

Abdominal aortic aneurysm (AAA) rupture is a catastrophic clinical emergency involving the full-thickness failure of the aortic wall in the abdominal segment, resulting in profuse internal hemorrhage. This condition typically occurs in the infrarenal segment of the aorta and leads to rapid exsanguination into the retroperitoneal or intraperitoneal space. The pathophysiology involves the progressive degradation of the tunica media and elastin fibers, often exacerbated by chronic inflammation and hemodynamic stress. Without immediate surgical intervention—either via open laparotomy and graft placement or endovascular aneurysm repair (EVAR)—the mortality rate approachs 100%. Clinical survival is heavily dependent on the containment of the hemorrhage by the retroperitoneum, providing a brief window for emergency repair.

Clinical Symptoms

  • Sudden-onset, severe abdominal or lumbar back pain
  • Pulsatile abdominal mass
  • Profound hypotension and circulatory collapse
  • Syncopal or near-syncopal episodes
  • Radiation of pain to the flank, groin, or scrotum
  • Nausea and vomiting
  • Tachycardia
  • Diaphoresis and cool, clammy extremities
  • Grey Turner sign (flank ecchymosis)
  • Abdominal distension and guarding

Common Causes

  • Atherosclerotic degradation of the arterial wall
  • Chronic untreated or poorly controlled hypertension
  • Long-term tobacco use (smoking)
  • Advanced age (typically over 65 years)
  • Genetic connective tissue disorders (Marfan syndrome, Ehlers-Danlos syndrome Type IV)
  • Family history of aneurysmal disease
  • Male gender
  • Chronic obstructive pulmonary disease (COPD)
  • Inflammatory vasculitides
  • Mycotic infection of the aortic wall

Documentation & Coding Tips

Explicitly state the presence of a rupture and the specific anatomical segment of the abdominal aorta involved.

Example: Patient presented with sudden onset of severe mid-abdominal pain radiating to the back. Imaging confirmed a 7.5 cm infrarenal abdominal aortic aneurysm with evidence of acute rupture and retroperitoneal hematoma. Diagnosis: Ruptured Abdominal Aortic Aneurysm (I71.3). Intervention: Emergent endovascular repair.

Billing Focus: Documentation must specify the rupture status to differentiate from I71.4 (without rupture). Specificity regarding the site (infrarenal vs. pararenal) supports surgical code selection.

Document hemodynamic stability and associated shock or acute blood loss anemia.

Example: Upon arrival, patient was hypotensive (BP 82/40) and tachycardic (HR 122), consistent with hypovolemic shock secondary to ruptured AAA. Initial Hgb was 7.2 g/dL, indicating acute posthemorrhagic anemia. Condition: Ruptured AAA with associated hypovolemic shock (R57.1) and acute blood loss anemia (D62).

Billing Focus: Capturing manifestations like shock and anemia as secondary diagnoses justifies higher levels of Evaluation and Management (E/M) and critical care services.

Describe the location of the hemorrhage, such as intraperitoneal or retroperitoneal.

Example: Emergency CT angiography demonstrated a ruptured aneurysm of the abdominal aorta with massive intraperitoneal hemorrhage and free fluid in the paracolic gutters. The aneurysm measures 8.2 cm at the level of the bifurcation.

Billing Focus: The location of hemorrhage assists in justifying the surgical approach (open laparotomy vs. endovascular) and specific CPT procedure codes.

Capture underlying atherosclerosis or other causative factors such as hypertension.

Example: The patient has a long-standing history of generalized atherosclerosis and poorly controlled essential hypertension, which contributed to the rapid expansion and subsequent rupture of the infrarenal abdominal aortic aneurysm.

Billing Focus: Documentation of atherosclerosis (I70.0) provides a complete clinical picture and supports medical necessity for cardiovascular surveillance.

Ensure clear documentation of the surgical or endovascular repair technique and any graft used.

Example: Successfully performed an emergent endovascular aneurysm repair (EVAR) for ruptured AAA using a bifurcated modular stent graft. Graft was deployed successfully across the infrarenal rupture site with proximal and distal seal achieved.

Billing Focus: The specific technique (EVAR vs. Open) and the anatomical extent of the graft determine the primary surgical CPT code.

Relevant CPT Codes

Related Diagnoses

Hierarchy