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Official Description

Nasal/sinus endoscopy, surgical, with maxillary antrostomy; with removal of tissue from maxillary sinus

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A surgical nasal/sinus endoscopy is a minimally invasive procedure that allows for direct visualization and treatment of the nasal cavity and paranasal sinuses. In this specific procedure, identified by CPT® Code 31267, a maxillary antrostomy is performed, which involves creating an opening in the maxillary sinus to facilitate access. Prior to the procedure, a topical nasal decongestant and a local anesthetic, often combined with a vasoconstrictor, are applied to minimize discomfort and reduce bleeding during the surgery. An endoscope, a thin, flexible tube equipped with a camera and light source, is introduced through the nostril to inspect the nasal cavity and the paranasal sinuses for any signs of disease or abnormalities. The procedure includes the removal of the uncinate process, a small bone structure that can obstruct the natural drainage of the maxillary sinus. This is achieved by using specialized instruments such as upbiting forceps and a microdebrider to ensure that the natural maxillary sinus ostium is clearly visualized and accessible. Following the creation of the maxillary antrostomy, the procedure continues with the removal of diseased tissue from the maxillary sinus lining. This tissue, which may be inflamed or infected, is carefully excised using a microdebrider, allowing for improved drainage and function of the sinus. Overall, this procedure is aimed at alleviating symptoms associated with sinusitis and other sinus-related conditions, promoting better sinus health and function.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 31267 is indicated for patients experiencing conditions that affect the maxillary sinus, particularly when conservative treatments have failed. The following are specific indications for performing this surgical intervention:

  • Chronic Sinusitis Persistent inflammation of the maxillary sinus that does not respond to medical management.
  • Sinus Polyps Presence of abnormal tissue growths within the maxillary sinus that may obstruct drainage.
  • Infection Recurrent or severe infections of the maxillary sinus that require surgical intervention for resolution.
  • Obstruction Blockage of the maxillary sinus ostium that impedes normal drainage and ventilation.

2. Procedure

The procedure for CPT® Code 31267 involves several critical steps to ensure effective access and treatment of the maxillary sinus. Each step is detailed as follows:

  • Step 1: Preparation The patient is positioned appropriately, and a topical nasal decongestant is applied to reduce swelling in the nasal passages. A local anesthetic, often combined with a vasoconstrictor, is administered to minimize discomfort during the procedure.
  • Step 2: Endoscope Introduction An endoscope is carefully introduced through the nostril into the nasal cavity. This instrument allows the surgeon to visualize the nasal passages and paranasal sinuses on a monitor, facilitating the identification of any abnormalities.
  • Step 3: Uncinate Process Removal The uncinate process, which can obstruct the maxillary sinus ostium, is removed. This is accomplished by using upbiting forceps to grasp and excise the uncinate process, followed by the use of a microdebrider to clear any remaining fragments, ensuring that the natural maxillary sinus ostium is visible.
  • Step 4: Maxillary Antrostomy A maxillary antrostomy is performed by enlarging the maxillary sinus ostium. This is achieved using through-cutting forceps to create a sufficient opening that allows for better access to the sinus.
  • Step 5: Tissue Removal Following the creation of the maxillary antrostomy, diseased tissue lining the maxillary sinus is removed. A microdebrider is utilized to excise the moist, inflamed tissue, which may be contributing to the patient's symptoms.

3. Post-Procedure

After the completion of the procedure, patients may experience some discomfort and nasal congestion, which is expected as part of the recovery process. Post-procedure care typically includes instructions for nasal saline irrigation to promote healing and reduce crusting. Patients may also be advised to avoid strenuous activities and to follow up with their healthcare provider to monitor recovery and assess the effectiveness of the procedure. Any prescribed medications, such as antibiotics or anti-inflammatory drugs, should be taken as directed to prevent infection and manage inflammation.

Short Descr ENDOSCOPY MAXILLARY SINUS
Medium Descr NSL/SINUS NDSC MAX ANTROST W/RMVL TISS MAX SINUS
Long Descr Nasal/sinus endoscopy, surgical, with maxillary antrostomy; with removal of tissue from maxillary sinus
Status Code Active Code
Global Days 000 - Endoscopic or Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 3 - Special payment adjustment rules for multiple endoscopic procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
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.
Endoscopic Base Code 31231  Nasal endoscopy, diagnostic, unilateral or bilateral (separate 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) P8I - Endoscopy - other
MUE 1
CCS Clinical Classification 33 - Other OR therapeutic procedures on nose, mouth and pharynx
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).
LT Left side (used to identify procedures performed on the left side of the body)
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
RT Right side (used to identify procedures performed on the right side of the body)
GC This service has been performed in part by a resident under the direction of a teaching physician
SG Ambulatory surgical center (asc) facility service
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.
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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.
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).
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.
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.
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.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
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
SC Medically necessary service or supply
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2011-01-01 Changed Short description changed. Guideline information changed.
Pre-1990 Added Code added.
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