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Code deleted, see 99499

Official Description

Oversight of the care of an extracorporeal liver assist system patient requiring review of status, review of laboratories and other studies, and revision of orders and liver assist care plan (as appropriate), within a calendar month, 30 minutes or more of non-face-to-face time

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 0405T pertains to the oversight of care for patients utilizing an extracorporeal liver assist system, which is a critical intervention for individuals experiencing liver failure. This procedure involves a comprehensive review of the patient's clinical status, including an assessment of laboratory results and other relevant studies. The medical professional is responsible for revising treatment orders and the liver assist care plan as necessary, ensuring that the patient receives optimal support during this challenging time. The extracorporeal liver assist system serves as a temporary measure, either as a bridge to a liver transplant or to facilitate the recovery of the liver itself. Patients with liver failure often face severe complications, including coagulopathy, hemodynamic instability, and multisystem organ failure due to inadequate perfusion and oxygenation. The extracorporeal liver assist system operates similarly to a hemodialysis machine, effectively filtering the patient's blood to eliminate harmful toxins, such as water-soluble and albumin-bound substances, which can include small fatty acids, metabolites of aromatic amino acids, bilirubin, and other vasoactive agents. Continuous monitoring of the patient's cognitive function, renal performance, and metabolic parameters, including glucose levels, electrolytes, and acid-base balance, is essential. Additionally, the integrity of hemodialysis access points, such as arteriovenous fistulas or central venous catheters, must be maintained. The code 0405T specifically accounts for 30 minutes or more of non-face-to-face time dedicated to these critical oversight activities within a calendar month.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The oversight of care for patients utilizing an extracorporeal liver assist system is indicated for individuals experiencing liver failure. This procedure is particularly relevant for patients who may require temporary support while awaiting a liver transplant or those whose liver function is expected to recover. The following conditions and symptoms may warrant the use of this procedure:

  • Liver Failure - A critical condition where the liver is unable to perform its essential functions, leading to a buildup of toxins in the body.
  • Elevated Toxin Levels - Increased levels of harmful substances in the bloodstream that can result from liver dysfunction.
  • Coagulopathy - A disorder affecting the blood's ability to clot, which can be exacerbated by liver failure.
  • Hemodynamic Dysregulation - Abnormal blood flow and pressure regulation, which may manifest as vasodilation or low mean arterial pressure.
  • Multisystem Organ Failure - A severe condition where multiple organ systems fail due to inadequate perfusion and oxygenation.

2. Procedure

The procedure for overseeing the care of a patient with an extracorporeal liver assist system involves several critical steps to ensure effective management and support. Each step is designed to provide comprehensive oversight and facilitate the patient's recovery or transition to further treatment.

  • Step 1: Review of Patient Status - The medical professional begins by conducting a thorough review of the patient's current clinical status. This includes evaluating the patient's overall health, symptoms, and any changes in their condition since the last assessment.
  • Step 2: Laboratory and Study Review - Following the initial status review, the clinician examines laboratory results and other diagnostic studies. This analysis is crucial for identifying any abnormalities or changes that may require adjustments to the treatment plan.
  • Step 3: Revision of Orders - Based on the findings from the patient status and laboratory reviews, the clinician may revise existing treatment orders. This step ensures that the patient receives the most appropriate and effective care tailored to their current needs.
  • Step 4: Update Liver Assist Care Plan - The final step involves updating the liver assist care plan as necessary. This plan outlines the ongoing management strategies and interventions required to support the patient's liver function and overall health.

3. Post-Procedure

After the oversight procedure is completed, the patient will continue to be monitored closely for any changes in their condition. Ongoing assessments will focus on cognitive function, renal performance, and metabolic parameters, including glucose levels and electrolytes. Additionally, the integrity of hemodialysis access points must be regularly checked to prevent complications. The clinician may schedule follow-up reviews to ensure that the care plan remains effective and to make further adjustments as needed. The goal of this oversight is to provide continuous support and facilitate the best possible outcomes for patients undergoing treatment with an extracorporeal liver assist system.

Short Descr OVRSGHT XTRCORP LIV ASST PAT
Medium Descr OVERSIGHT CARE OF XTRCORP LIVER ASSIST SYS PAT
Long Descr Oversight of the care of an extracorporeal liver assist system patient requiring review of status, review of laboratories and other studies, and revision of orders and liver assist care plan (as appropriate), within a calendar month, 30 minutes or more of non-face-to-face time
Status Code Carriers Price the Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Code Not Recognized by OPPS when submitted on Outpatient Hospital Part B Bill Type (12x/13x)
Berenson-Eggers TOS (BETOS) M5D - Specialist - other
MUE Not applicable/unspecified.
Date
Action
Notes
2020-12-31 Deleted Code deleted, see 99499
2016-01-01 Added Added
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