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Official Description

Colectomy, partial; with coloproctostomy (low pelvic anastomosis)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 44145 refers to a partial colectomy procedure that includes a coloproctostomy, specifically involving a low pelvic anastomosis. This surgical intervention is performed to remove a diseased segment of the colon while preserving the rectum. The procedure begins with a midline incision in the abdomen, allowing the surgeon to inspect the abdominal cavity thoroughly. The superior rectal vessels are identified and carefully dissected from the sacral promontory, followed by ligation and division to ensure proper blood supply management during the surgery. The rectum is then mobilized, which involves detaching it from surrounding tissues to facilitate access to the colon. The segment of the colon that is affected by disease is also mobilized to prepare for resection. Once the diseased segment is identified, the colon is clamped above and below the planned transection sites to prevent blood loss and contamination. The surgeon transects the colon, removing the diseased portion, and subsequently sutures the remaining distal and proximal segments together in a process known as anastomosis. This procedure is specifically coded as 44145 when it is performed without creating a colostomy. In contrast, if a colostomy is necessary, the procedure would be coded as 44146. The detailed steps of the procedure ensure that the patient can maintain bowel continuity while addressing the underlying condition effectively.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure coded as CPT® 44145 is indicated for various conditions affecting the colon that necessitate surgical intervention. These may include:

  • Colon Cancer The presence of malignant tumors within the colon that require resection to prevent further spread and to manage the disease effectively.
  • Diverticulitis Severe cases of diverticulitis that do not respond to conservative treatment and may lead to complications such as perforation or abscess formation.
  • Inflammatory Bowel Disease Conditions such as Crohn's disease or ulcerative colitis that result in significant damage to the colon, necessitating partial removal.
  • Benign Tumors Non-cancerous growths in the colon that may cause obstruction or other complications, requiring surgical removal.

2. Procedure

The procedure involves several critical steps to ensure successful resection and anastomosis. The following outlines the procedural steps:

  • Step 1: Incision and Inspection A midline incision is made in the abdomen, allowing the surgeon to gain access to the abdominal cavity. This step is crucial for visualizing the colon and rectum, as well as assessing any surrounding structures for abnormalities.
  • Step 2: Identification and Dissection of Vessels The superior rectal vessels are located and dissected from the sacral promontory. This step is essential to prevent excessive bleeding during the procedure, as these vessels supply blood to the rectal area.
  • Step 3: Mobilization of the Rectum The rectum is mobilized from its proximal aspect to the mid to distal aspect as needed. This mobilization is necessary to provide adequate access for the resection of the colon and to facilitate the anastomosis.
  • Step 4: Mobilization of the Colon The segment of the colon that is to be resected is also mobilized. This ensures that the diseased portion can be effectively removed without damaging surrounding tissues.
  • Step 5: Transection of the Colon The colon is clamped above and below the planned transection sites to control blood flow. The surgeon then transects the colon, removing the diseased segment while ensuring that the remaining segments are prepared for anastomosis.
  • Step 6: Anastomosis The remaining distal and proximal segments of the colon are sutured together, completing the anastomosis. This step is critical for restoring bowel continuity and function.

3. Post-Procedure

After the completion of the colectomy and anastomosis, post-procedure care is essential for patient recovery. Patients are typically monitored for any signs of complications, such as infection or anastomotic leakage. Pain management is provided, and patients may be advised on dietary modifications as they begin to resume normal eating. Follow-up appointments are necessary to assess healing and ensure that the anastomosis is functioning properly. Additionally, drains may be placed to prevent fluid accumulation at the surgical site, and the abdominal incision is closed in layers to promote optimal healing.

Short Descr PARTIAL REMOVAL OF COLON
Medium Descr COLECTOMY PRTL W/COLOPROCTOSTOMY
Long Descr Colectomy, partial; with coloproctostomy (low pelvic anastomosis)
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) P1B - Major procedure - colectomy
MUE 1
CCS Clinical Classification 78 - Colorectal resection

This is a primary code that can be used with these additional add-on codes.

44139 Addon Code MPFS Status: Active Code APC C CPT Assistant Article Illustration for Code Mobilization (take-down) of splenic flexure performed in conjunction with partial colectomy (List separately in addition to primary procedure)
44701 Addon Code MPFS Status: Active Code APC N ASC N1 Illustration for Code Intraoperative colonic lavage (List separately in addition to code for primary procedure)
96547 Add On Code MPFS Status: Active Code APC N Intraoperative hyperthermic intraperitoneal chemotherapy (HIPEC) procedure, including separate incision(s) and closure, when performed; first 60 minutes (List separately in addition to code for primary procedure)
96548 Add On Code MPFS Status: Active Code APC N Intraoperative hyperthermic intraperitoneal chemotherapy (HIPEC) procedure, including separate incision(s) and closure, when performed; each additional 30 minutes (List separately in addition to code for primary procedure)
GC This service has been performed in part by a resident under the direction of a teaching physician
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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).
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.
55 Postoperative management only: when 1 physician or other qualified health care professional performed the postoperative management and another performed the surgical procedure, the postoperative component may be identified by adding modifier 55 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.
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.
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.)
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
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
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
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)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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