43620

Gastrectomy, total; with esophagoenterostomy

CPT 43620 describes a major surgical procedure known as a total gastrectomy where the entire stomach is surgically removed. This procedure is most commonly performed to treat gastric malignancies, such as adenocarcinoma, or for patients with a high genetic risk of developing stomach cancer, such as those with the CDH1 gene mutation. During the operation, the surgeon performs an upper midline laparotomy to access the abdominal cavity. The stomach is meticulously mobilized by ligating and dividing the blood vessels supplying it, including the left and right gastric arteries and the gastroepiploic vessels. The surgeon removes the entire stomach from the distal esophagus to the proximal duodenum. Lymph node dissection is often performed concurrently to ensure oncologic clearance. To restore the continuity of the gastrointestinal tract, an esophagoenterostomy is performed, which involves creating a surgical connection (anastomosis) between the esophagus and a loop of the small intestine, typically the jejunum. The most common reconstruction technique is the Roux-en-Y esophagojejunostomy, which prevents biliary reflux into the esophagus. This complex surgery requires significant post-operative monitoring for complications such as anastomotic leaks, nutritional deficiencies (including vitamin B12, iron, and calcium), and dumping syndrome. The procedure aims to achieve complete resection of diseased tissue while maintaining a functional pathway for nutrition.

Clinical Indications

  • Gastric adenocarcinoma involving the body or fundus of the stomach
  • Hereditary Diffuse Gastric Cancer (HDGC) associated with CDH1 mutations
  • Extensive gastric lymphoma confined to the stomach
  • Refractory gastric outlet obstruction not amenable to lesser resection
  • Zollinger-Ellison syndrome not controlled by medical therapy
  • Severe gastric necrosis or caustic injury involving the entire stomach

Procedure Steps

  1. Perform a midline laparotomy or upper abdominal incision to gain access to the stomach.
  2. Inspect the abdominal cavity for evidence of metastatic disease or peritoneal seeding.
  3. Mobilize the stomach by dividing the greater and lesser omentum.
  4. Ligate and divide the major gastric blood vessels: the left and right gastric, and left and right gastroepiploic arteries.
  5. Perform a regional lymph node dissection (D1 or D2) if treating malignancy.
  6. Transect the proximal duodenum just distal to the pylorus using a surgical stapler.
  7. Transect the distal esophagus above the gastroesophageal junction.
  8. Remove the entire stomach and any associated lymph nodes as a single specimen.
  9. Identify a suitable loop of jejunum for reconstruction, typically 15-20 cm distal to the ligament of Treitz.
  10. Construct a Roux-en-Y limb and perform an esophagoenterostomy (esophagojejunostomy) using manual sutures or a circular stapler.
  11. Create a jejunojejunostomy to restore biliary drainage.
  12. Test the integrity of the esophageal anastomosis for leaks using air or methylene blue.
  13. Close the abdominal wall in layers after ensuring hemostasis.

Coding Guidelines

  • CPT 43620 is an open procedure; for laparoscopic total gastrectomy, refer to 43644 or 43645.
  • Do not report 43620 in conjunction with codes for minor gastric procedures performed on the same specimen.
  • If a total gastrectomy is performed with a Roux-en-Y reconstruction involving a specific bowel limb length or configuration as defined in 43621, use that code instead.
  • If a total gastrectomy is performed with the formation of an intestinal pouch (Huntsman pouch or similar), use code 43622.
  • Lymphadenectomy performed as part of the radical resection for malignancy is generally considered bundled unless it exceeds the standard regional scope.
  • Use modifier 50 if bilateral (not applicable here) or modifier 51 for multiple procedures if other distinct surgeries are performed.

Associated ICD-10 Codes