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Official Description

Colonoscopy through stoma; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A colonoscopy through a stoma is a specialized procedure that involves the examination of the colon via an existing stoma, such as a colostomy. This procedure is primarily diagnostic in nature and may include the collection of specimens through techniques such as brushing or washing. During the colonoscopy, a colonoscope—a flexible tube equipped with a camera and light—is inserted through the stoma and advanced through the colon. The physician inspects the mucosal surfaces of the colon for any abnormalities, which may include ulcerations, varices, bleeding sites, lesions, strictures, or other pathological conditions. After the initial inspection, the endoscope is withdrawn, allowing for a second evaluation of the mucosal surfaces. In addition to visual inspection, the procedure may involve obtaining cytology samples. This is accomplished by introducing a brush through the endoscope to collect cell samples from the mucosal lining. Alternatively, sterile water can be used to wash the mucosal surfaces, and the aspirated fluid can be analyzed for cellular content. If any suspicious areas are identified during the examination, the procedure may be extended to include biopsies. This involves the use of biopsy forceps that are inserted through the endoscope to capture tissue samples from the identified sites. The collected samples, whether they are cytology or biopsy specimens, are then sent for laboratory analysis, which is reported separately. This comprehensive approach allows for thorough evaluation and diagnosis of potential gastrointestinal issues in patients with a stoma.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The colonoscopy through a stoma is indicated for various diagnostic purposes, particularly when there is a need to evaluate the condition of the colon in patients who have undergone stoma creation. The following conditions may warrant this procedure:

  • Abnormal Findings: Patients presenting with symptoms such as unexplained abdominal pain, changes in bowel habits, or rectal bleeding may require this procedure to investigate potential underlying issues.
  • Surveillance: Individuals with a history of colorectal cancer or polyps may undergo this procedure for routine surveillance to monitor for recurrence or new growths.
  • Inflammatory Bowel Disease: Patients diagnosed with conditions like Crohn's disease or ulcerative colitis may need this procedure to assess the extent of disease activity and complications.
  • Stenosis or Obstruction: The procedure may be indicated in cases where there is suspicion of strictures or obstructions within the colon that require evaluation.

2. Procedure

The colonoscopy through a stoma involves several key procedural steps that ensure a thorough examination of the colon:

  • Step 1: Preparation and Anesthesia Before the procedure begins, the patient is prepared, which may include fasting and the administration of sedation or anesthesia to ensure comfort during the examination.
  • Step 2: Insertion of the Colonoscope The colonoscope is carefully inserted through the stoma, allowing the physician to advance it through the colon. This step requires precision to navigate the anatomical structures effectively.
  • Step 3: Inspection of Mucosal Surfaces As the colonoscope is advanced, the physician inspects the mucosal surfaces of the colon for any abnormalities. This includes looking for signs of ulcerations, varices, bleeding sites, lesions, or strictures.
  • Step 4: Withdrawal and Re-inspection After the initial inspection, the endoscope is withdrawn, and the mucosal surfaces are inspected again to ensure that no abnormalities are missed during the first pass.
  • Step 5: Collection of Cytology Samples If necessary, a brush is introduced through the endoscope to collect cell samples from the mucosal lining. Alternatively, sterile water may be introduced to wash the mucosal surfaces, and the aspirated fluid is collected for analysis.
  • Step 6: Biopsy Procedure If any suspicious areas are identified, biopsy forceps are inserted through the biopsy channel of the endoscope. The forceps are opened to capture tissue samples from the identified sites, which are then removed through the endoscope.
  • Step 7: Completion of the Procedure Once all necessary samples are collected, the procedure is concluded, and the colonoscope is fully withdrawn. The collected cytology and biopsy samples are sent for laboratory analysis, which is reported separately.

3. Post-Procedure

After the colonoscopy through a stoma, patients are typically monitored for a short period to ensure recovery from sedation. It is common for patients to experience mild discomfort or cramping following the procedure. Instructions regarding diet and activity levels may be provided, and patients are advised to report any unusual symptoms, such as excessive bleeding or severe pain. Follow-up appointments may be scheduled to discuss the results of the laboratory analysis of the collected samples and to determine any further necessary interventions based on the findings.

Short Descr COLONOSCOPY THRU STOMA SPX
Medium Descr COLONOSCOPY STOMA DX INCLUDING COLLJ SPEC SPX
Long Descr Colonoscopy through stoma; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Status Code Active Code
Global Days 000 - Endoscopic or Minor Procedure
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) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Procedure or Service, Multiple Reduction Applies
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P8D - Endoscopy - colonoscopy
MUE 1
CCS Clinical Classification 76 - Colonoscopy and biopsy
PT Colorectal cancer screening test; converted to diagnostic test or other procedure
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.
33 Preventive services: when the primary purpose of the service is the delivery of an evidence based service in accordance with a us preventive services task force a or b rating in effect and other preventive services identified in preventive services mandates (legislative or regulatory), the service may be identified by adding 33 to the procedure. for separately reported services specifically identified as preventive, the modifier should not be used.
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).
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.
74 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure after administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may terminate a surgical or diagnostic procedure after the administration of anesthesia (local, regional block(s), general) or after the procedure was started (incision made, intubation started, scope inserted, etc). under these circumstances, the procedure started but terminated can be reported by its usual procedure number and the addition of modifier 74. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
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.)
AF Specialty physician
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
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
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
KX Requirements specified in the medical policy have been met
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
SG Ambulatory surgical center (asc) facility service
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
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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Notes
2017-01-01 Changed Moderate (Conscious) Sedation flag removed. See new Moderate Sedation category.
2015-01-01 Changed Description Changed
Pre-1990 Added Code added.
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