CPT 49084 Peritoneal Lavage Reimbursement & Policy | OpenPayer

Summary & Overview

CPT 49084: Diagnostic Peritoneal Lavage to Detect Internal Bleeding

CPT code 49084 represents diagnostic peritoneal lavage — a procedure that irrigates the peritoneal cavity to identify internal bleeding, often with imaging guidance. This code is used in acute diagnostic evaluation when intra-abdominal hemorrhage is suspected and rapid assessment is required. Nationally, accurate coding of this procedure affects clinical documentation, acute care workflow, and claims processing for emergency and surgical services.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of clinical purpose and typical settings, common modifiers and related billing considerations (listed separately), and guidance on where to locate relevant policy and coverage information. The publication summarizes typical service lines and sites of service, highlights billing nuances for emergency and operative environments, and outlines what to expect in payer interactions and claims adjudication for this diagnostic surgical procedure.

This analysis is intended for clinicians, coding professionals, and billing managers seeking a clear, national-level summary of CPT code 49084, including operational and documentation implications and where to find payer policy detail. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 49084peritoneal lavagediagnostic proceduresurgical codingemergency surgeryimaging-guided proceduresacute careoperating room procedures

Billing Code Overview

CPT code 49084 describes a diagnostic peritoneal lavage procedure in which the provider irrigates the peritoneal cavity to detect internal hemorrhage. The procedure may use imaging guidance to visualize internal structures during the washout and assessment.

Service type: Diagnostic surgical procedure
Typical site of service: Operating room or procedural suite; may also be performed in an emergency department setting when indicated

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult presenting to the emergency department after blunt abdominal trauma (for example, a motor vehicle collision or a fall) with hypotension, abdominal pain, abdominal distention, or signs of peritoneal irritation. The trauma team performs primary survey and resuscitation; when hemodynamic instability or concern for intra-abdominal hemorrhage persists and imaging (focused assessment with sonography for trauma — FAST) is equivocal or unavailable, the surgeon performs a diagnostic peritoneal lavage (49084) to detect intraperitoneal bleeding. The procedure may occur in the ED, an emergency operating room, or a procedure suite. Local anesthesia and sterile technique are used; a small incision is made, the peritoneal cavity is entered, and lavage solution is instilled and withdrawn for gross blood, red cell count, or cytology. Results guide immediate clinical decisions such as proceeding to exploratory laparotomy, continued observation, or additional imaging (CT abdomen/pelvis) if the patient is stable. The documentation includes indication, consent, anesthesia type, technique (open vs. closed), volumes instilled and recovered, findings (gross blood, RBC count), any imaging guidance used, and any complications or conversions to operative exploration.

Coding Specifications

Modifier	Description	When to Use
`23`	Unusual anesthesia	Use when general anesthesia is administered for a procedure that normally requires local or no anesthesia, e.g., in an agitated trauma patient requiring under general anesthesia.

CPT 49010: Retroperitoneal Exploration with Biopsy

CPT-49020-OPEN-INCISION-DRAINAGE-INTRA-ABDOMINAL-ABSCESS

CPT 49020: Open Incision and Drainage of Intra‑abdominal Abscess

CPT-49082-ABDOMINAL-PARACENTESIS-WITHOUT-IMAGING

CPT 49082: Abdominal Paracentesis Without Imaging

CPT-49040-SUBDIAPHRAGMATIC-ABSCESS-INCISION-AND-DRAINAGE

CPT 49040: Incision and Drainage of Subdiaphragmatic Abscess

CPT-49014-PELVIC-CAVITY-REOPENING-AND-REMOVAL-OF-PACKING

CPT 49014: Reopening Pelvic Cavity and Removal of Preperitoneal Packing

CPT-49013-PELVIC-PREPERITONEAL-PACKING-FOR-HEMORRHAGE-CONTROL

CPT 49013: Preperitoneal Pelvic Packing for Hemorrhage Control

CPT-49000-INTRA-ABDOMINAL-EXPLORATION-WITH-BIOPSY

CPT 49000: Intra-Abdominal Exploration with Biopsy

CPT-49062-EXTRAPERITONEAL-LYMPHATIC-FLUID-DRAINAGE

CPT 49062: Extraperitoneal Lymphatic Fluid Drainage

CPT-49002-EXPLORATORY-REOPENING-OF-ABDOMINAL-INCISION

CPT 49002: Reopening of Abdominal Incision for Exploration

CPT-49083-IMAGE-GUIDED-ABDOMINAL-PARACENTESIS

CPT 49083: Image-Guided Abdominal Paracentesis

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49084

Taxonomy Code	Specialty	Notes
208000000X	General Surgery	General surgeons commonly perform diagnostic peritoneal lavage in trauma or emergent abdominal bleeding evaluation.
207P00000X	Emergency Medicine	Emergency physicians may perform bedside lavage in the ED when immediate assessment for hemorrhage is required.
208600000X	Trauma Surgery	Trauma surgeons frequently perform `49084` as part of acute trauma assessment and decision-making.
208800000X	Obstetrics & Gynecology	OB/GYN surgeons may perform peritoneal lavage when evaluating suspected intraperitoneal bleeding from gynecologic sources.
362K00000X	Vascular Surgery	Vascular surgeons may be involved when intra-abdominal vascular injury is suspected and lavage findings prompt operative repair.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S36.0`	Injury of spleen	Splenic injury can cause intraperitoneal hemorrhage detected by `49084`.
`S36.1`	Injury of kidney	Renal lacerations with intraperitoneal bleeding may prompt lavage when diagnosis is uncertain.
`S36.5`	Injury of intestine	Bowel/mesenteric injury can result in hemoperitoneum and peritoneal signs evaluated with lavage.
`S36.8`	Other intra-abdominal organ injuries	Miscellaneous organ injuries causing bleeding into the peritoneal cavity warrant diagnostic lavage.
`S39.0`	Unspecified injury of abdomen, lower back and pelvis	Used when trauma to the abdomen with suspected internal bleeding lacks a more specific code at presentation.
`K66.1`	Hemoperitoneum	Directly indicates blood in the peritoneal cavity and is a primary indication for diagnostic peritoneal lavage.
`R10.9`	Unspecified abdominal pain	Nonspecific abdominal pain with hemodynamic or exam findings may lead to lavage to evaluate for bleeding.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`49084`	Diagnostic peritoneal lavage	Primary code for lavage to detect intraperitoneal bleeding; used when the clinician performs peritoneal cavity washout for suspected hemorrhage.
`76937`	Ultrasound, guidance for percutaneous procedures; real-time	Often used immediately before or during `49084` if imaging guidance (eg, bedside ultrasound/FAST) assisted catheter placement or assessment.
`49000`	Incision and drainage or peritoneal cavity; diagnostic (limited)	May be used for related limited access procedures, though `49084` is the specific lavage code for diagnostic washout.
`49010`	Diagnostic peritoneal lavage, open (surgical)	Alternative reporting when an open surgical approach is used for lavage rather than closed catheter technique — documents approach variation.
`49002`	Laparotomy, exploratory; drainage or lavage	Performed when lavage findings lead directly to exploratory laparotomy for hemorrhage control; documents conversion to definitive surgical management.

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