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CPT 49423: Abdominal Drainage Catheter Exchange

CPT code 49423 covers the removal of an existing abdominal drainage catheter and replacement with a new drainage catheter for management of an abdominal cyst or abscess. This procedural code captures a targeted interventional service used to control intra-abdominal fluid collections and prevent or treat localized infection and related complications. Nationally, catheter exchange procedures affect hospital and outpatient interventional suites and have implications for quality of care, device utilization, and episode cost management.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for the procedure, typical sites of service, and the range of commonly reported billing modifiers. The publication summarizes national benchmarks where available, highlights policy or coding considerations relevant to payers, and outlines common clinical scenarios that justify catheter exchange rather than simple catheter removal or revision.

The report is intended for coding professionals, revenue cycle leaders, clinicians involved in procedural care, and policy analysts seeking a clear summary of the code’s clinical application, payer coverage landscape, and areas where coding clarity may affect reimbursement and utilization tracking.

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Billing Code Overview

CPT code 49423 describes a procedure in which a provider removes an existing drainage catheter used to drain an abdominal cyst or abscess and replaces it with a new drainage catheter. This procedure is an interventional radiology or surgical drainage service focused on management of intra-abdominal fluid collections.

Service type: Catheter exchange for drainage of abdominal cyst or abscess
Typical site of service: Ambulatory surgical center or hospital procedural area, including interventional radiology suite or operating room

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CPT 49423: Abdominal Drainage Catheter Exchange

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Billing Code Overview

Service type: Catheter exchange for drainage of abdominal cyst or abscess
Typical site of service: Ambulatory surgical center or hospital procedural area, including interventional radiology suite or operating room

Clinical & Coding Specifications

Clinical Context

A 58-year-old patient presents with persistent drainage from a percutaneous catheter placed to drain a previously identified intra-abdominal abscess. The existing catheter demonstrates declining flow and pain at the insertion site; imaging (ultrasound or CT) confirms proper catheter position but suggests partial obstruction or biofilm formation. The interventional radiology team elects to remove the malfunctioning drainage catheter and replace it with a new percutaneous drainage catheter under conscious sedation. Typical workflow: pre-procedure evaluation and informed consent; ultrasound or CT guidance to access the catheter tract; sterile removal of the old catheter; placement of a guidewire and exchange or placement of a new catheter of appropriate caliber; confirmation of position and drainage; securement and dressing; brief post-procedure observation and discharge instructions. Typical site of service: hospital-based interventional radiology suite, outpatient ambulatory surgery center, or emergency department procedure area. Service type: percutaneous catheter exchange/replacement for abdominal cyst or abscess drainage using image guidance and minor procedural sedation as indicated.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician professional component separate from technical services (rare for this code).
`50`	Bilateral procedure	Use if two separate abdominal drainage catheters are exchanged in the same session and payer requires bilateral reporting (apply per payer rules).
`51`	Multiple procedures	Use when this service is reported in addition to another distinct procedure performed the same day and payer requires modifier for multiple procedures.
`52`	Reduced services	Use when the procedure was intentionally partially reduced or not completed as described by the code.
`53`	Discontinued procedure	Use if the catheter exchange was started but aborted due to patient instability or unforeseen circumstances.
`59`	Distinct procedural service	Use to indicate a distinct procedural service separate from other procedures performed at the same session (e.g., separate access site).
`62`	Two surgeons	Use when two surgeons with distinct roles perform portions of the procedure.
`76`	Repeat procedure by same physician	Use if the same provider repeats the catheter exchange later the same day.
`77`	Repeat procedure by another physician	Use if a different provider repeats the procedure later the same day.
`78`	Unplanned return to the operating/procedure room for a related procedure during the postoperative period	Use for an unplanned return to address catheter malfunction or complication during the global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for surgical procedures	Use when an advanced practice clinician performs or assists and the payer requires this modifier.
`LT`	Left side	Use to indicate the left-sided location when laterality is relevant and payer requires it.
`RT`	Right side	Use to indicate the right-sided location when laterality is relevant and payer requires it.

Taxonomy Code	Specialty	Notes
207P00000X	Interventional Radiology	Primary specialty performing image-guided percutaneous catheter procedures.
208000000X	Diagnostic Radiology	Radiologists who perform percutaneous drainage procedures in some settings.
308600000X	General Surgery	Surgeons who manage intra-abdominal abscesses and may perform catheter placement or exchange.
363A00000X	Emergency Medicine	Emergency physicians may perform or coordinate catheter exchanges in acute settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K65.0`	Acute peritonitis	Represents intra-abdominal infection that can be associated with abscess formation requiring drainage.
`K65.1`	Chronic tuberculous peritonitis	Chronic peritoneal infection that may lead to loculated collections requiring catheter drainage.
`K68.11`	Encapsulating peritoneal sclerosis	Can cause loculated fluid collections or cystic changes that require percutaneous management.
`K66.1`	Peritoneal adhesions (postprocedural)	Adhesions may complicate catheter drainage and necessitate catheter exchange or repositioning.
`K57.2`	Diverticulitis of large intestine with perforation and abscess	Common source of intra-abdominal abscesses managed with percutaneous drainage.
`K35.80`	Acute appendicitis with abscess	Appendiceal abscesses frequently drained percutaneously with catheter placement or exchange.
`N18.6`	End stage renal disease	Patients on dialysis may develop peritoneal dialysis catheter issues or intra-abdominal fluid collections requiring drainage.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49424`	Peritoneal drainage, percutaneous, with catheter placement, without imaging guidance	Alternative drainage code when imaging guidance is not used; sometimes reported for initial catheter placement.
`49422`	Removal of peritoneal drainage catheter (simple)	Reported when an existing catheter is removed without immediate replacement; may precede or follow exchange if coded separately.
`76937`	Ultrasound guidance for percutaneous catheter placement	Image guidance commonly used during catheter exchange; reported when ultrasound guidance is separately reportable per payer policy.
`77012`	CT guidance for needle placement (e.g., abscess drainage)	CT guidance code used when CT imaging is employed during exchange or placement.
`99152`	Moderate sedation services (initial 15 minutes, physician)	Reported when the physician provides moderate sedation during the procedure and payer requires separate reporting.

CPT 49424: Catheter Contrast Injection for Abscess or Cyst Evaluation

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when reporting only the physician professional component separate from technical services (rare for this code).
`50`	Bilateral procedure	Use if two separate abdominal drainage catheters are exchanged in the same session and payer requires bilateral reporting (apply per payer rules).
`51`	Multiple procedures	Use when this service is reported in addition to another distinct procedure performed the same day and payer requires modifier for multiple procedures.
`52`	Reduced services	Use when the procedure was intentionally partially reduced or not completed as described by the code.
`53`	Discontinued procedure	Use if the catheter exchange was started but aborted due to patient instability or unforeseen circumstances.
`59`	Distinct procedural service	Use to indicate a distinct procedural service separate from other procedures performed at the same session (e.g., separate access site).
`62`	Two surgeons	Use when two surgeons with distinct roles perform portions of the procedure.
`76`	Repeat procedure by same physician	Use if the same provider repeats the catheter exchange later the same day.
`77`	Repeat procedure by another physician	Use if a different provider repeats the procedure later the same day.
`78`	Unplanned return to the operating/procedure room for a related procedure during the postoperative period	Use for an unplanned return to address catheter malfunction or complication during the global period.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for surgical procedures	Use when an advanced practice clinician performs or assists and the payer requires this modifier.
`LT`	Left side	Use to indicate the left-sided location when laterality is relevant and payer requires it.
`RT`	Right side	Use to indicate the right-sided location when laterality is relevant and payer requires it.

Taxonomy Code	Specialty	Notes
207P00000X	Interventional Radiology	Primary specialty performing image-guided percutaneous catheter procedures.
208000000X	Diagnostic Radiology	Radiologists who perform percutaneous drainage procedures in some settings.
308600000X	General Surgery	Surgeons who manage intra-abdominal abscesses and may perform catheter placement or exchange.
363A00000X	Emergency Medicine	Emergency physicians may perform or coordinate catheter exchanges in acute settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K65.0`	Acute peritonitis	Represents intra-abdominal infection that can be associated with abscess formation requiring drainage.
`K65.1`	Chronic tuberculous peritonitis	Chronic peritoneal infection that may lead to loculated collections requiring catheter drainage.
`K68.11`	Encapsulating peritoneal sclerosis	Can cause loculated fluid collections or cystic changes that require percutaneous management.
`K66.1`	Peritoneal adhesions (postprocedural)	Adhesions may complicate catheter drainage and necessitate catheter exchange or repositioning.
`K57.2`	Diverticulitis of large intestine with perforation and abscess	Common source of intra-abdominal abscesses managed with percutaneous drainage.
`K35.80`	Acute appendicitis with abscess	Appendiceal abscesses frequently drained percutaneously with catheter placement or exchange.
`N18.6`	End stage renal disease	Patients on dialysis may develop peritoneal dialysis catheter issues or intra-abdominal fluid collections requiring drainage.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49424`	Peritoneal drainage, percutaneous, with catheter placement, without imaging guidance	Alternative drainage code when imaging guidance is not used; sometimes reported for initial catheter placement.
`49422`	Removal of peritoneal drainage catheter (simple)	Reported when an existing catheter is removed without immediate replacement; may precede or follow exchange if coded separately.
`76937`	Ultrasound guidance for percutaneous catheter placement	Image guidance commonly used during catheter exchange; reported when ultrasound guidance is separately reportable per payer policy.
`77012`	CT guidance for needle placement (e.g., abscess drainage)	CT guidance code used when CT imaging is employed during exchange or placement.
`99152`	Moderate sedation services (initial 15 minutes, physician)	Reported when the physician provides moderate sedation during the procedure and payer requires separate reporting.

CPT 49424: Catheter Contrast Injection for Abscess or Cyst Evaluation

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 49423: Abdominal Drainage Catheter Exchange

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Billing Code Overview

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CPT 49423: Abdominal Drainage Catheter Exchange

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References