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Official Description

Biopsy of anorectal wall, anal approach (eg, congenital megacolon)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A biopsy of the anorectal wall is a medical procedure that involves the removal of a small sample of tissue from the wall of the anorectal region. This procedure is typically performed through the anal approach and is indicated for various conditions, including congenital megacolon, which is also known as Hirschsprung's disease. Congenital megacolon is characterized by an abnormal dilation or enlargement of the colon, resulting from the absence or a significantly reduced number of ganglion cells that are normally present in the muscular wall of the rectum and colon. These ganglion cells are essential for the proper functioning of the bowel, and their deficiency can lead to severe constipation and other gastrointestinal complications. During the biopsy, the specific area of the anorectal wall that requires examination is carefully identified and cleansed to minimize the risk of infection. A local anesthetic is then administered to ensure patient comfort during the procedure. Following this, an incision is made in the anorectal wall, allowing for the extraction of a tissue sample. This sample is subsequently prepared and sent for laboratory evaluation, which is reported separately. The biopsy is a critical diagnostic tool that aids in the assessment of underlying conditions affecting the anorectal region.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The biopsy of the anorectal wall is performed for specific medical indications, particularly when there is a need to investigate abnormalities in the anorectal region. The following conditions may warrant this procedure:

  • Congenital Megacolon This condition, also known as Hirschsprung's disease, is characterized by the absence or significant reduction of ganglion cells in the colon, leading to severe constipation and bowel obstruction.

2. Procedure

The procedure for performing a biopsy of the anorectal wall involves several critical steps to ensure accuracy and patient safety. Each step is outlined as follows:

  • Step 1: Identification and Cleansing The first step involves identifying the specific area of the anorectal wall that requires biopsy. This area is then thoroughly cleansed to reduce the risk of infection and prepare the site for the procedure.
  • Step 2: Anesthesia Administration After cleansing, a local anesthetic is injected into the area to ensure that the patient remains comfortable and pain-free during the biopsy. This step is crucial for minimizing discomfort during the procedure.
  • Step 3: Incision and Tissue Sample Collection Once the area is anesthetized, the healthcare provider makes a careful incision in the anorectal wall. This incision allows access to the tissue, from which a small sample is obtained for further analysis.
  • Step 4: Preparation and Laboratory Evaluation After the tissue sample is collected, it is prepared for evaluation. The sample is sent to a laboratory for analysis, which is reported separately, providing essential information for diagnosis and treatment planning.

3. Post-Procedure

Following the biopsy of the anorectal wall, patients may experience some discomfort or minor bleeding at the site of the incision. It is important for healthcare providers to monitor the patient for any signs of complications, such as infection or excessive bleeding. Patients are typically advised on post-procedure care, which may include instructions on managing pain, maintaining hygiene, and recognizing any concerning symptoms that may require further medical attention. Recovery time can vary, but most patients can resume normal activities shortly after the procedure, depending on their individual circumstances and the extent of the biopsy performed.

Short Descr BIOPSY OF RECTUM
Medium Descr BX ANORECTAL WALL ANAL APPROACH
Long Descr Biopsy of anorectal wall, anal approach (eg, congenital megacolon)
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) 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 Hospital Part B services paid through a comprehensive APC
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) P6C - Minor procedures - other (Medicare fee schedule)
MUE 2
CCS Clinical Classification 77 - Proctoscopy and anorectal biopsy
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.
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.
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.)
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).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
GC This service has been performed in part by a resident under the direction of a teaching physician
GW Service not related to the hospice patient's terminal condition
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
SG Ambulatory surgical center (asc) facility service
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
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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