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Official Description

Nasal/sinus endoscopy, surgical; with biopsy, polypectomy or debridement (separate procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 31237 refers to a surgical nasal and sinus endoscopy that includes the performance of a biopsy, polypectomy, or debridement as a separate procedure. This minimally invasive technique involves the use of an endoscope, which is a specialized instrument equipped with a camera and light source, allowing for direct visualization of the nasal cavity and paranasal sinuses. Prior to the procedure, a topical nasal decongestant and local anesthetic, often combined with a vasoconstrictor, are administered to minimize discomfort and reduce bleeding during the examination. The endoscope is carefully introduced through the nostril, enabling the physician to inspect the nasal passages and sinuses for any signs of disease, abnormalities, or obstructions. During this examination, tissue samples may be collected for laboratory analysis to diagnose potential conditions. If polyps or other abnormal growths are identified, they can be excised using various tools such as suction devices, grasping forceps, or a microdebrider. Additionally, any debris or devitalized tissue present in the nasal cavity and the maxillary, ethmoid, and sphenoid sinuses is meticulously removed to promote better airflow and sinus drainage. To manage any bleeding that may occur during the procedure, nasal packing is utilized, and plastic splints may be placed within the nasal passages to support healing post-operatively. The endoscopic procedure can also be enhanced by the use of a camera, allowing for real-time visualization on a video monitor, with the option to record the images for further review or documentation.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 31237 is indicated for various conditions affecting the nasal cavity and paranasal sinuses. These indications may include:

  • Biopsy: To obtain tissue samples for histological examination in cases of suspected malignancy or other pathological conditions.
  • Polypectomy: To remove nasal polyps that may be causing obstruction, chronic sinusitis, or other related symptoms.
  • Debridement: To clear out debris and necrotic tissue from the nasal cavity and sinuses, which can help alleviate symptoms and improve sinus function.

2. Procedure

The procedure involves several key steps that ensure thorough examination and treatment of the nasal and sinus areas. These steps include:

  • Preparation: Prior to the procedure, a topical nasal decongestant is applied to reduce swelling and facilitate easier access to the nasal passages. A local anesthetic, often combined with a vasoconstrictor, is also administered to minimize discomfort and control bleeding during the procedure.
  • Endoscope Introduction: The endoscope is carefully introduced through the nostril into the nasal cavity. This instrument allows the physician to visualize the internal structures of the nasal passages and paranasal sinuses directly.
  • Inspection: The physician inspects the nasal cavity and the openings of the paranasal sinuses for any signs of disease, abnormalities, or obstructions. This visual assessment is crucial for determining the appropriate course of action.
  • Tissue Sampling: If any suspicious lesions or abnormalities are identified, tissue samples may be taken for biopsy. These samples are sent to a laboratory for further analysis to assist in diagnosis.
  • Polypectomy: If polyps are present, they are removed using specialized instruments such as suction devices, grasping forceps, or a microdebrider. This step is essential for relieving obstruction and improving sinus drainage.
  • Debridement: The procedure also involves the removal of any debris and devitalized tissue from the nasal cavity and the maxillary, ethmoid, and sphenoid sinuses. This helps to clear the sinuses and promote healing.
  • Bleeding Control: Throughout the procedure, any bleeding is managed using nasal packing to ensure a clear surgical field and minimize complications.
  • Post-Procedure Support: After the completion of the procedure, plastic splints may be placed in the nasal passages to support healing and maintain patency of the airways.
  • Documentation: The endoscopic examination may be supplemented by a camera, with images displayed on a video monitor. These images can be recorded for documentation purposes, providing a visual record of the findings and interventions performed.

3. Post-Procedure

Post-procedure care following CPT® Code 31237 involves monitoring for any complications and ensuring proper healing. Patients may experience some nasal congestion and minor discomfort, which can be managed with prescribed medications. It is important to follow up with the healthcare provider to assess healing and address any concerns. Patients may also be advised on nasal care, including the use of saline sprays to keep the nasal passages moist and to avoid activities that could disrupt healing, such as vigorous exercise or blowing the nose forcefully. The placement of plastic splints may require specific care instructions to ensure they remain in place and do not cause irritation. Follow-up appointments are typically scheduled to evaluate the success of the procedure and to determine if further treatment is necessary.

Short Descr NSL/SINS NDSC SURG BX POLYPC
Medium Descr NASAL/SINUS NDSC SURG W/BX POLYPC/DBRDMT SPX
Long Descr Nasal/sinus endoscopy, surgical; with biopsy, polypectomy or debridement (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) 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 31 - Diagnostic procedures on nose, mouth and pharynx
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).
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.)
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.
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)
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.)
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.
GC This service has been performed in part by a resident under the direction of a teaching physician
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).
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
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.
27 Multiple outpatient hospital e/m encounters on the same date: for hospital outpatient reporting purposes, utilization of hospital resources related to separate and distinct e/m encounters performed in multiple outpatient hospital settings on the same date may be reported by adding modifier 27 to each appropriate level outpatient and/or emergency department e/m code(s). this modifier provides a means of reporting circumstances involving evaluation and management services provided by physician(s) in more than one (multiple) outpatient hospital setting(s) (eg, hospital emergency department, clinic). note: this modifier is not to be used for physician reporting of multiple e/m services performed by the same physician on the same date. for physician reporting of all outpatient evaluation and management services provided by the same physician on the same date and performed in multiple outpatient setting(s) (eg, hospital emergency department, clinic), see evaluation and management, emergency department, or preventive medicine services codes.
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).
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.
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AG Primary physician
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
GA Waiver of liability statement issued as required by payer policy, individual case
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
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
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
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
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
SA Nurse practitioner rendering service in collaboration with a physician
SG Ambulatory surgical center (asc) facility service
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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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2024-01-01 Changed Short and Medium Descriptions changed.
2011-01-01 Changed Short description changed.
1994-01-01 Added First appearance in code book in 1994.
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