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Official Description

Nasal/sinus endoscopy, surgical with ethmoidectomy; total (anterior and posterior), including frontal sinus exploration, with removal of tissue from frontal sinus, when performed

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Nasal/sinus endoscopy with total ethmoidectomy and frontal sinus exploration is a surgical procedure designed to address various conditions affecting the nasal and sinus cavities. This procedure is particularly beneficial for patients suffering from sinusitis, nasal polyps, mucoceles, and tumors. The primary goal of the surgery is to eliminate obstructions in the outflow tracts of the sinuses, which can lead to chronic inflammation and infection. By debriding inflamed sinus tissue, the procedure promotes mucociliary clearance, allowing for improved drainage and function of the sinuses. The ethmoid sinuses, located between the eyes and the bridge of the nose, typically contain 7 to 15 cells that can become obstructed. The frontal sinuses, situated anteriorly to the ethmoid sinuses, are bordered by the agger nasi and the ethmoid bulla. During the procedure, an anesthetic is applied to ensure patient comfort, and an endoscope is inserted through the nasal passages to visualize and access the affected areas. The surgical steps involve careful inspection and manipulation of the nasal cavity, including the middle turbinate and the uncinate process, to facilitate access to the maxillary and ethmoid sinuses. The procedure culminates in frontal sinus exploration, which is performed after the ethmoidectomy to prevent bleeding from obscuring the surgical field. Overall, this comprehensive approach allows for effective treatment of complex sinus conditions, enhancing patient outcomes and quality of life.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure is indicated for the following conditions:

  • Sinusitis Chronic inflammation of the sinuses that can lead to infection and obstruction.
  • Nasal Polyps Noncancerous growths in the nasal passages or sinuses that can obstruct airflow and drainage.
  • Mucoceles Cystic lesions that can form in the sinuses, often due to obstruction of the sinus drainage pathways.
  • Sinus Tumors Abnormal growths within the sinus cavities that may require surgical intervention for removal.

2. Procedure

The procedure involves several detailed steps to ensure thorough access and treatment of the affected sinuses:

  • Anesthesia Application An anesthetic is applied using ribbon gauze, neurosurgical pads, or injection to ensure patient comfort during the procedure.
  • Endoscope Insertion An endoscope is inserted through the nose to inspect the nasal cavity, nasopharynx, nasal septum, turbinates, and lateral nasal wall for any abnormalities.
  • Middle Turbinate Medialization The middle turbinate is medialized to provide better access to the surgical site.
  • Incision in the Uncinate Process An incision is made in the anterior portion of the uncinate process to expose the natural ostium of the maxillary sinus.
  • Ethmoid Bulla Identification The ethmoid bulla is identified and opened to allow access to the ethmoid cells.
  • Bony Portion Removal The bony portion of the ethmoid bulla is removed using a microdebrider or cutting forceps, facilitating further access to the anterior ethmoid cells.
  • Resection of Anterior Ethmoid Cells Resection is performed laterally and posteriorly to uncap the remainder of the anterior ethmoid cells, which are debrided to the base of the skull.
  • Accessing Posterior Ethmoid Sinus The posterior ethmoid sinus is accessed by perforating the basal lamella superiorly and laterally to the junction of the vertical and horizontal segments of the middle turbinate.
  • Basal Lamella Removal The lateral and superior portions of the basal lamella are removed using a microdebrider, extending posteriorly through the cells to the face of the sphenoid sinus.
  • Frontal Sinus Exploration After completing the ethmoidectomy, frontal sinus exploration is performed using an angled scope to visualize the frontal sinus arising from the agger nasi.
  • Resection of Agger Nasi The agger nasi is resected along the anterosuperior attachment of the middle turbinate to create a patent frontal recess.
  • Outflow Tract Location An ostium probe is used to locate the outflow tract, followed by the removal of the anterior nasofrontal beak and the superior aspect of the nasal septum.
  • Final Checks and Packing The surgical cavity is checked for bleeding, packed as necessary, and the endoscope is removed to complete the procedure.

3. Post-Procedure

Post-procedure care involves monitoring for any signs of bleeding or complications. Patients may experience some discomfort and nasal congestion following the surgery, which is expected as part of the recovery process. It is essential to follow any specific post-operative instructions provided by the healthcare provider, which may include recommendations for pain management, nasal saline irrigation, and follow-up appointments to assess healing and ensure proper recovery. The overall recovery time can vary based on individual circumstances and the extent of the procedure performed.

Short Descr NSL/SINS NDSC TOTAL
Medium Descr NASAL/SINUS NDSC TOT W/FRNT SINS EXPL TISS RMVL
Long Descr Nasal/sinus endoscopy, surgical with ethmoidectomy; total (anterior and posterior), including frontal sinus exploration, with removal of tissue from frontal sinus, when performed
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 Non office-based surgical procedure added in CY 2008 or later; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) none
MUE 1
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).
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)
RT Right side (used to identify procedures performed on the right side of the body)
SG Ambulatory surgical center (asc) facility 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).
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.
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.)
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
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
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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2018-01-01 Added Code Added.
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