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Official Description

Imbrication of diaphragm for eventration, transthoracic or transabdominal, paralytic or nonparalytic

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Imbrication of the diaphragm for eventration, as described by CPT® Code 39545, is a surgical procedure aimed at addressing diaphragmatic eventration, which is characterized by the abnormal elevation of the diaphragm. This condition can lead to significant complications, including compromised lung function due to reduced thoracic space and impaired bowel function from the displacement of abdominal organs into the thoracic cavity. Diaphragmatic eventration can be classified into two categories: congenital or nonparalytic eventration, which is present at birth, and paralytic eventration, which develops later in life. The surgical intervention can be performed using two approaches: transthoracic or transabdominal. The transthoracic approach is typically reserved for cases of severe diaphragmatic elevation, while the transabdominal approach may be suitable for less severe instances. During the procedure, careful dissection is performed to expose the diaphragm, and the surgical team takes precautions to protect the phrenic nerve, which is crucial for diaphragm function. The procedure involves reducing the displaced abdominal contents back into the abdominal cavity, trimming the redundant portion of the diaphragm, and reconstructing it by overlapping the edges of the diaphragm muscle to restore its normal function and position.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 39545 is indicated for the treatment of diaphragmatic eventration, which can manifest in both congenital and acquired forms. The following conditions may warrant this surgical intervention:

  • Congenital Eventration - This condition is present at birth and involves the abnormal elevation of the diaphragm, which may require surgical correction to improve respiratory and gastrointestinal function.
  • Paralytic Eventration - This acquired condition occurs when there is a loss of muscle tone in the diaphragm, leading to its elevation and potential displacement of abdominal organs into the thoracic cavity.
  • Severe Diaphragmatic Elevation - Cases where the diaphragm is significantly elevated, compromising lung capacity and function, may necessitate a transthoracic approach for effective surgical intervention.

2. Procedure

The procedure for imbrication of the diaphragm for eventration involves several critical steps to ensure effective correction of the condition. The following procedural steps are outlined:

  • Step 1: Approach Selection - The surgical team determines the appropriate approach based on the severity of the diaphragmatic elevation. A transthoracic approach is selected for severe cases, while a transabdominal approach may be utilized for less severe instances.
  • Step 2: Thoracotomy - For the transthoracic approach, an anterolateral thoracotomy is performed through the intercostal space. The specific intercostal level chosen depends on the degree of diaphragmatic elevation observed in the patient.
  • Step 3: Exposure of the Diaphragm - Once the thoracotomy is completed, the anterior portion of the diaphragmatic leaflet is carefully exposed to allow access to the diaphragm for further surgical intervention.
  • Step 4: Opening the Diaphragm - The dome of the diaphragm is opened with precision, ensuring that the phrenic nerve, which innervates the diaphragm, is protected throughout the procedure.
  • Step 5: Reduction of Abdominal Contents - Any displaced abdominal contents that have protruded into the thoracic cavity are gently reduced back into the abdominal cavity to restore normal anatomical positioning.
  • Step 6: Trimming and Reconstruction - The redundant portion of the diaphragmatic dome is trimmed to eliminate excess tissue. The remaining edges of the diaphragm muscle are then reconstructed by overlapping them, which helps to restore the diaphragm's normal contour and function.

3. Post-Procedure

After the completion of the imbrication procedure, patients typically require monitoring for any complications related to the surgery. Post-procedure care may include pain management, respiratory support, and gradual mobilization to promote recovery. The expected recovery period can vary based on the individual patient's health status and the extent of the surgical intervention. Follow-up appointments are essential to assess the healing process and ensure that the diaphragm is functioning properly following the surgery.

Short Descr REVISION OF DIAPHRAGM
Medium Descr IMBRICATION DIAPHRAGM EVENTRATION
Long Descr Imbrication of diaphragm for eventration, transthoracic or transabdominal, paralytic or nonparalytic
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) 1 - Co-surgeons could be paid, though supporting documentation is required...
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 1
CCS Clinical Classification 42 - Other OR therapeutic procedures on respiratory system
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.
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).
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).
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.
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.
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.
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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