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Official Description

Interpelviabdominal amputation (hindquarter amputation)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An interpelviabdominal amputation, commonly known as a hindquarter amputation, hemipelvectomy, or transpelvic amputation, is a surgical procedure that entails the removal of half of the pelvis along with the leg on the same side. This complex and significant operation is typically reserved for extreme medical situations, such as severe trauma, life-threatening infections like gas gangrene, or aggressive malignant tumors, including Ewing's sarcoma, osteosarcoma, and chondrosarcoma, that affect the lower extremity and pelvic girdle. The procedure is characterized by its rarity, as it is only performed when absolutely necessary due to the serious nature of the conditions it addresses. The surgical approach involves careful planning and execution, beginning with the marking of incision lines on the skin over the pelvis, hip, and thigh. This meticulous preparation is crucial for ensuring the best possible outcomes for patients facing such dire circumstances.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The interpelviabdominal amputation is indicated in specific, severe medical conditions that necessitate the removal of the pelvis and lower extremity on one side. The following are the primary indications for this procedure:

  • Severe Trauma - Cases of significant injury to the pelvic region or lower limb that cannot be salvaged.
  • Infections - Life-threatening infections such as gas gangrene that compromise the integrity of the tissues and bone.
  • Malignant Neoplasms - Tumors such as Ewing's sarcoma, osteosarcoma, and chondrosarcoma that invade the lower extremity and pelvic girdle, necessitating amputation to prevent further spread and to manage the disease effectively.

2. Procedure

The procedure for interpelviabdominal amputation involves several critical steps, each designed to ensure the safe and effective removal of the affected anatomical structures. The following outlines the procedural steps:

  • Step 1: Marking the Incision - The surgical team begins by marking the incision lines on the skin over the pelvis, hip, and thigh, which serves as a guide for the surgical approach.
  • Step 2: Incision and Flap Creation - The skin and underlying soft tissue are incised along the marked lines. If feasible, a myocutaneous flap is created from the overlying tissue to aid in wound closure later.
  • Step 3: Detachment of Muscles - The muscles of the abdomen, back, and hip are carefully detached from the bone, allowing for better access to the bony pelvis and hip.
  • Step 4: Assessment of Extent - The surgeon assesses the extent of the trauma, infection, or malignant neoplasm to determine the necessary extent of the pelvectomy.
  • Step 5: Ligation of Blood Vessels - Blood vessels in the area are suture ligated and transected to prevent excessive bleeding during the procedure.
  • Step 6: Bone Cutting - Using a bone saw, the bones of the pelvis are cut along the planned amputation site, ensuring a clean and precise severance.
  • Step 7: Severing the Pelvis and Lower Extremity - The pelvis and lower extremity are completely severed and subsequently sent for pathological examination to evaluate any underlying conditions.
  • Step 8: Drain Placement - Drains are placed in the pelvis to facilitate the removal of any excess fluid that may accumulate post-operatively.
  • Step 9: Wound Closure - The previously created myocutaneous flap is utilized to cover the surgical wound, promoting healing and reducing the risk of infection.

3. Post-Procedure

After the interpelviabdominal amputation, patients typically require close monitoring and care to manage pain, prevent infection, and support recovery. The placement of drains will help in the management of fluid accumulation, and the surgical site will need regular assessment for signs of healing or complications. Rehabilitation may be necessary to assist the patient in adjusting to the loss of the limb and to promote mobility and independence. Follow-up appointments will be essential to monitor the patient's recovery and to address any further medical needs that may arise.

Short Descr AMPUTATION OF LEG AT HIP
Medium Descr INTERPELVIABDOMINAL AMPUTATION
Long Descr Interpelviabdominal amputation (hindquarter amputation)
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) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 157 - Amputation of lower extremity
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).
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).
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.
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).
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)
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Pre-1990 Added Code added.
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