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Official Description

Sinusotomy frontal; obliterative, with osteoplastic flap, coronal incision

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Obliterative frontal sinusotomy, as described by CPT® Code 31085, is a surgical procedure aimed at addressing issues related to the frontal sinus, particularly in cases where other treatments have failed. This procedure is less commonly performed today but may still be indicated for patients suffering from intractable frontal sinusitis, especially when previous endoscopic treatments have not yielded satisfactory results. It may also be necessary in cases of mucopyocele, which is a collection of pus within the sinus, or in the event of late complications arising from prior open obliteration procedures that were unsuccessful. The technique involves creating a coronal incision that extends from one ear to the other along the hairline, allowing for direct access to the frontal sinus. The procedure entails the removal of the frontal sinus mucosa and subsequent obliteration of the sinus cavity, typically using abdominal fat to fill the space, thereby preventing future complications associated with sinus disease. This approach is particularly relevant for patients who have not responded to less invasive treatments and require a more definitive surgical intervention to manage their condition effectively.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The obliterative frontal sinusotomy procedure (CPT® Code 31085) is indicated for the following conditions:

  • Intractable Frontal Sinusitis - A chronic condition where the frontal sinus becomes persistently inflamed and infected, leading to significant discomfort and complications.
  • Failed Endoscopic Treatment - Situations where previous endoscopic interventions have not resolved the sinus issues, necessitating a more invasive surgical approach.
  • Mucopyocele - The presence of a pus-filled sac within the frontal sinus that requires surgical intervention to prevent further complications.
  • Late Complications of Previous Open Obliteration Procedures - Instances where earlier surgical attempts to obliterate the sinus have resulted in complications that need to be addressed.
  • Failed Open Obliteration - Cases where prior open surgical techniques to obliterate the sinus have not been successful, leading to the need for a repeat procedure.

2. Procedure

The obliterative frontal sinusotomy procedure involves several detailed steps to ensure effective access and treatment of the frontal sinus:

  • Step 1: Incision - A coronal incision is made, beginning at one ear and extending along the hairline to the opposite ear. This incision allows for adequate exposure of the frontal sinus.
  • Step 2: Elevation of Soft Tissues - The incision is carried down through the skin and soft tissues, and the superficial layer of the temporalis fascia is elevated. Care is taken to protect the branches of the facial nerve during this step.
  • Step 3: Exposure of the Frontal Bone - The frontal bone is accessed by opening it along the superior temporal line and elevating it anteriorly along the supraorbital rim and nasofrontal suture, which exposes the frontal sinus.
  • Step 4: Obliteration of the Frontal Sinus - The frontal sinus is obliterated by removing the mucosa and filling the cavity with abdominal fat or other materials to prevent future complications.
  • Step 5: Closure - After the obliteration is complete, the bone flap is replaced and secured using plates and screws. The soft tissues and skin are then closed in layers to ensure proper healing.

3. Post-Procedure

Post-procedure care following an obliterative frontal sinusotomy includes monitoring for any signs of complications, such as infection or bleeding. Patients may experience swelling and discomfort in the surgical area, which can be managed with prescribed pain medications. Follow-up appointments are essential to assess healing and ensure that the sinus has been adequately obliterated. Patients are typically advised to avoid strenuous activities and to follow specific instructions regarding wound care to promote optimal recovery. The expected recovery time may vary based on individual health factors and the extent of the procedure performed.

Short Descr REMOVAL OF FRONTAL SINUS
Medium Descr SINUSOT FRNT OBLIT W/OSTPL FLAP CORONAL INC
Long Descr Sinusotomy frontal; obliterative, with osteoplastic flap, coronal incision
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) 1 - 150% payment adjustment for bilateral procedures applies.
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 Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Device-intensive procedure added to ASC list in CY 2008 or later; paid at adjusted rate.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 33 - Other OR therapeutic procedures on nose, mouth and pharynx
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.
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).
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.
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.
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
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)
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