Select the appropriate procedure code based on the approach & device:

4A1Z - None

  • Via Natural or Artificial Opening Approach

    Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure

    • Temperature
      • 4A1Z7KZ - Monitoring of Temperature, Via Natural or Artificial Opening

  • External Approach

    Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

    • Temperature
      • 4A1ZXKZ - Monitoring of Temperature, External Approach
    • Sleep
      • 4A1ZXQZ - Monitoring of Sleep, External Approach