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Official Description

Drainage of peritoneal abscess or localized peritonitis, exclusive of appendiceal abscess, open

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An abscess is defined as a localized collection of pus that can occur in various parts of the body. Specifically, a peritoneal abscess refers to an accumulation of pus within the peritoneum, which is the membrane lining the abdominal cavity. This type of abscess may also be referred to as an intraperitoneal abscess. The presence of localized peritonitis indicates inflammation of the peritoneal tissue in a specific area, often associated with infection or the presence of an abscess. The procedure described by CPT® Code 49020 involves making an incision in the abdomen to access the peritoneal cavity. During this surgical intervention, the entire cavity is explored to locate the abscess. The surgeon separates any loculations, which are compartments within the abscess, and thoroughly evacuates all debris, including pus, blood, and necrotic tissue. To ensure complete removal of infectious material, the abscess site is irrigated vigorously with sterile saline or an antibiotic solution. Following the irrigation, a drain is placed within the abscess cavity to facilitate ongoing drainage, and the abdomen is subsequently closed around the drain to promote healing and prevent further complications.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 49020 is indicated for specific clinical scenarios involving the presence of a peritoneal abscess or localized peritonitis. The following conditions may warrant this surgical intervention:

  • Peritoneal Abscess A localized collection of pus within the peritoneal cavity that requires drainage to prevent further complications.
  • Localized Peritonitis Inflammation of the peritoneal tissue in a circumscribed area, often associated with infection or abscess formation.

2. Procedure

The procedure for drainage of a peritoneal abscess or localized peritonitis involves several critical steps to ensure effective treatment. Each step is essential for the successful evacuation of the abscess and the management of the underlying infection.

  • Step 1: Incision The procedure begins with the surgeon making an incision in the abdominal wall to gain access to the peritoneal cavity. This incision is strategically placed to allow optimal visualization and access to the area where the abscess is located.
  • Step 2: Exploration Once the incision is made, the surgeon explores the entire peritoneal cavity. This exploration is crucial for identifying the exact location of the abscess and assessing the extent of the infection or inflammation present.
  • Step 3: Separation of Loculations After locating the abscess, the surgeon separates any loculations, which are compartments within the abscess that may contain pus or other debris. This step is vital for ensuring that all infected material is addressed during the procedure.
  • Step 4: Evacuation of Debris The next step involves the thorough evacuation of all debris from the abscess cavity. This includes the removal of pus, blood, and necrotic tissue, which are critical to reducing the risk of further infection and promoting healing.
  • Step 5: Irrigation Following the evacuation, the abscess site is vigorously irrigated with sterile saline or an antibiotic solution. This irrigation helps to cleanse the area and ensures that any remaining infectious material is removed, further reducing the risk of complications.
  • Step 6: Drain Placement After irrigation, a drain is placed within the abscess cavity. The drain serves to facilitate ongoing drainage of any residual fluid or pus, which is essential for preventing re-accumulation and promoting recovery.
  • Step 7: Closure Finally, the abdomen is closed around the drain. This closure is performed carefully to ensure that the drain remains in place while allowing for proper healing of the abdominal wall.

3. Post-Procedure

Post-procedure care following the drainage of a peritoneal abscess involves monitoring the patient for any signs of complications, such as infection or re-accumulation of fluid. The drain placed in the abscess cavity will require regular assessment to ensure it is functioning properly and to monitor the output. Patients may also need to be educated on signs of infection, such as fever, increased pain, or changes in the drainage from the site. Follow-up appointments will be necessary to evaluate the healing process and to determine if further interventions are required.

Short Descr DRAINAGE ABDOM ABSCESS OPEN
Medium Descr DRAINAGE PERITON ABSCESS/LOCAL PERITONITIS OPEN
Long Descr Drainage of peritoneal abscess or localized peritonitis, exclusive of appendiceal abscess, open
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard 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) 2 - Payment restriction for assistants at surgery does not apply 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 Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 2
CCS Clinical Classification 99 - Other OR gastrointestinal therapeutic procedures
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
54 Surgical care only: when 1 physician or other qualified health care professional performs a surgical procedure and another provides preoperative and/or postoperative management, surgical services may be identified by adding modifier 54 to the usual procedure number.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AG Primary physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
ET Emergency services
GJ "opt out" physician or practitioner emergency or urgent service
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
LT Left side (used to identify procedures performed on the left side of the body)
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
RT Right side (used to identify procedures performed on the right side of the body)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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2014-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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