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Official Description

Proctectomy, partial, without anastomosis, perineal approach

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 45123 is a partial proctectomy performed via a perineal approach, primarily indicated for the treatment of malignant neoplasms located in the rectum. In this surgical intervention, the lower bowel undergoes cleansing through rectal irrigation to prepare for the operation. The technique involves making lateral incisions on both sides of the anus, which are then extended both anteriorly and posteriorly to facilitate access to the rectal area. A critical aspect of this procedure is the closure of the anus using a purse-string suture, which helps to secure the area post-excision. As the surgery progresses, the pudendal vessels are carefully clamped and ligated upon encountering them, ensuring minimal bleeding during the operation. The incision is then advanced posteriorly through the anococcygeal ligament and anteriorly, it is extended proximally behind the prostatic or vaginal fascia. Following this, the rectum is closed below the intended transection site with another purse-string suture, and the rectum is transected above the neoplasm. The levator muscles are divided to allow for the removal of the diseased portion of the colon through the perineal incision. Ultimately, the rectum is divided above the purse-string sutures, and the affected section is excised, with careful control of any bleeding before the incisions are closed. This detailed approach ensures that the malignant tissue is effectively removed while maintaining as much surrounding structure as possible.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure is indicated for the treatment of malignant neoplasms of the rectum. This condition may present with various symptoms, including rectal bleeding, changes in bowel habits, and abdominal pain, which necessitate surgical intervention to remove the cancerous tissue and prevent further complications.

  • Malignant Neoplasm of the Rectum The primary indication for performing a partial proctectomy is the presence of cancerous growths in the rectal area, which require surgical removal to manage the disease effectively.

2. Procedure

The procedure involves several critical steps to ensure the effective removal of the malignant tissue while minimizing complications.

  • Step 1: Preparation The lower bowel is cleansed through rectal irrigation to prepare the surgical site and reduce the risk of infection during the procedure.
  • Step 2: Incision Lateral incisions are made on either side of the anus, extending both anteriorly and posteriorly to provide adequate access to the rectum for the surgical intervention.
  • Step 3: Closure of the Anus A purse-string suture is placed to close the anus, which is essential for maintaining the integrity of the anal area post-excision.
  • Step 4: Clamping and Ligation As the procedure progresses, the pudendal vessels are clamped and ligated upon encountering them to control bleeding and ensure a clear surgical field.
  • Step 5: Incision Extension The incision is carried posteriorly through the anococcygeal ligament and anteriorly, it is extended proximally behind the prostatic or vaginal fascia to access the rectum effectively.
  • Step 6: Rectal Closure The rectum is closed below the planned transection site using a purse-string suture, which helps secure the area before the transection.
  • Step 7: Transection of the Rectum The rectum is then transected above the level of the neoplasm, allowing for the removal of the affected tissue.
  • Step 8: Division of Levator Muscles The levator muscles are divided to facilitate the delivery of the diseased portion of the colon through the perineal incision.
  • Step 9: Removal of Diseased Tissue The diseased section of the rectum is excised, ensuring that all malignant tissue is removed to prevent recurrence.
  • Step 10: Control of Bleeding and Closure Bleeding is controlled, and the incisions are closed meticulously to promote healing and reduce the risk of postoperative complications.

3. Post-Procedure

Post-procedure care involves monitoring for any signs of complications such as bleeding or infection at the surgical site. Patients may require pain management and should be advised on dietary modifications to facilitate recovery. Follow-up appointments are essential to assess healing and ensure that there are no signs of recurrence of the malignancy. The healthcare team will provide specific instructions regarding activity restrictions and wound care to promote optimal recovery.

Short Descr PARTIAL PROCTECTOMY
Medium Descr PRCTECT PRTL W/O ANAST PRNL APPR
Long Descr Proctectomy, partial, without anastomosis, perineal approach
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 78 - Colorectal resection
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).
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.
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.)
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
GC This service has been performed in part by a resident under the direction of a teaching physician
Date
Action
Notes
1995-01-01 Added First appearance in code book in 1995.
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