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Official Description

Colectomy, partial, with removal of terminal ileum with ileocolostomy

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A colectomy, specifically a partial colectomy with the removal of the terminal ileum and subsequent ileocolostomy, is a surgical procedure performed to address various conditions affecting the colon and terminal ileum. This operation typically involves making a midline incision in the abdomen to gain access to the abdominal cavity. During the procedure, the surgeon inspects the abdominal organs and identifies the diseased segment of the colon that requires removal. The procedure entails mobilizing the affected portion of the colon along with a segment of the terminal ileum, which is the last part of the small intestine. The surgeon then clamps the colon and terminal ileum above and below the area designated for transection, allowing for the diseased sections to be excised. Following the removal, an ileocolostomy is performed, which involves connecting the remaining segment of the terminal ileum to the remaining healthy segment of the colon in an end-to-end configuration. This connection is crucial for restoring continuity of the gastrointestinal tract. After the surgical steps are completed, drains may be placed to prevent fluid accumulation, and the abdominal incisions are meticulously closed to promote healing.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The partial colectomy with removal of the terminal ileum and ileocolostomy is indicated for several specific conditions affecting the colon and terminal ileum. These may include:

  • Colon Cancer The presence of malignant tumors in the colon that necessitate surgical intervention to remove the affected segment.
  • Inflammatory Bowel Disease Conditions such as Crohn's disease or ulcerative colitis that cause significant inflammation and damage to the colon and terminal ileum.
  • Diverticulitis Complications arising from diverticulitis, such as abscess formation or perforation, which may require resection of the affected bowel segment.
  • Obstruction Bowel obstructions due to strictures or adhesions that impede normal intestinal function and require surgical correction.

2. Procedure

The procedure begins with the surgeon making a midline abdominal incision to access the abdominal cavity. This incision allows for a thorough inspection of the abdominal organs to identify the diseased segment of the colon. Once the affected area is located, the surgeon mobilizes the diseased segment of the colon along with a portion of the terminal ileum. This mobilization is critical to ensure that there is enough healthy tissue available for the subsequent anastomosis.

  • Step 1: The colon and terminal ileum are clamped above and below the planned transection sites. This clamping is essential to control blood flow and prevent spillage of intestinal contents during the resection.
  • Step 2: The diseased segment of the colon and the terminal ileum are then divided and removed. This step involves careful dissection to ensure that surrounding structures are preserved as much as possible.
  • Step 3: Following the excision, an ileocolostomy is performed. This involves suturing the remaining segment of the terminal ileum to the remaining segment of the colon in an end-to-end fashion, thereby restoring continuity to the gastrointestinal tract.
  • Step 4: After the anastomosis is completed, drains may be placed to facilitate the removal of any excess fluid or potential infection from the surgical site.
  • Step 5: Finally, the abdominal incisions are closed in layers to promote optimal healing and recovery.

3. Post-Procedure

Post-procedure care involves monitoring the patient for any signs of complications, such as infection or anastomotic leakage. Patients are typically advised to follow a specific diet as they recover, gradually transitioning from clear liquids to a regular diet as tolerated. Pain management is also an important aspect of post-operative care. The surgical team will provide instructions regarding activity restrictions and follow-up appointments to ensure proper healing and assess the success of the procedure. Additionally, patients may require education on signs of complications that should prompt immediate medical attention.

Short Descr REMOVAL OF COLON
Medium Descr COLECTOMY PRTL W/RMVL TERMINAL ILEUM & ILEOCOLOS
Long Descr Colectomy, partial, with removal of terminal ileum with ileocolostomy
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.

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
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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).
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).
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.
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.
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.)
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).
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.
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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).
A2 Dressing for two wounds
AG Primary physician
AI Principal physician of record
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
GZ Item or service expected to be denied as not reasonable and necessary
LT Left side (used to identify procedures performed on the left side of the body)
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)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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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Action
Notes
2013-01-01 Changed Medium Descriptor changed.
2002-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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