Gastrointestinal
- 4A1B7 - Via Natural or Artificial Opening
- 4A1B78
- 4A1B78Z - Monitoring Gastrointestinal to No Qualifier with Motility, Via Natural or Artificial Opening Approach
- 4A1B7B
- 4A1B7BZ - Monitoring Gastrointestinal to No Qualifier with Pressure, Via Natural or Artificial Opening Approach
- 4A1B7G
- 4A1B7GZ - Monitoring Gastrointestinal to No Qualifier with Secretion, Via Natural or Artificial Opening Approach
- 4A1B8 - Via Natural or Artificial Opening Endoscopic
- 4A1B88
- 4A1B88Z - Monitoring Gastrointestinal to No Qualifier with Motility, Via Natural or Artificial Opening Endoscopic Approach
- 4A1B8B
- 4A1B8BZ - Monitoring Gastrointestinal to No Qualifier with Pressure, Via Natural or Artificial Opening Endoscopic Approach
- 4A1B8G
- 4A1B8GZ - Monitoring Gastrointestinal to No Qualifier with Secretion, Via Natural or Artificial Opening Endoscopic Approach
- 4A1BX - External
- 4A1BXS
- 4A1BXSH - Monitoring Gastrointestinal to Indocyanine Green Dye with Vascular Perfusion, External Approach