Summary & Overview
CPT 31032: Maxillary Antrostomy with Polypectomy
CPT code 31032 documents an open maxillary antrostomy with complete removal of the antral mucous membrane and dissection of the anterior wall to excise polyps and diseased material. This operative procedure aims to restore maxillary sinus drainage into the nasal cavity and address chronic sinus disease or obstructing polyps. Nationally, accurate coding for this procedure is important for procedure tracking, hospital and surgical center utilization, and consistent claims adjudication.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context explaining the procedure, common settings where the service is performed, and guidance on typical documentation elements needed to support the code. The publication also summarizes common modifiers and payer considerations when data are available and highlights areas where documentation commonly affects claim outcomes.
This summary provides clinicians, billing professionals, and policy analysts with a clear description of the service represented by CPT code 31032, the clinical rationale for the operation, and the payer landscape relevant to national billing and reimbursement practices. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 31032 describes a surgical procedure on the maxillary sinus where the provider makes an incision in the gums, removes the entire mucous membrane of the antrum to improve drainage from the maxillary sinus to the nose, and dissects the anterior wall to remove a polyp and other diseased material.
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Service type: Surgical procedure — open maxillary antrostomy with removal of diseased mucosa and polypectomy
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Typical site of service: Operating room or ambulatory surgical center (inpatient or outpatient surgical setting depending on clinical indications)
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with chronic maxillary sinusitis and obstructive maxillary sinus polyps causing persistent nasal congestion, facial pressure, recurrent purulent nasal discharge, and failure of medical therapy (antibiotics, topical nasal steroids, saline irrigations). The patient presents to an otolaryngology clinic after 6–12 weeks of conservative treatment without durable improvement. Preoperative evaluation includes nasal endoscopy, sinus CT imaging confirming maxillary sinus mucosal disease and polyps, medical clearance, and informed consent for a transoral Caldwell-Luc type approach.
On the day of service, the patient undergoes general anesthesia in an operating room. The surgeon makes a gingival (gum) incision in the canine-fossa region, elevates a mucoperiosteal flap, and creates an antral window. The entire diseased antral mucous membrane is removed to establish improved drainage to the nasal cavity. The anterior wall is dissected to excise polyps and remove chronic inflammatory tissue. Hemostasis is achieved, the oral mucosa is closed, and postoperative instructions include sinus precautions, antibiotics if indicated, and follow-up for nasal endoscopy and sinus care. Typical sites of service include the hospital outpatient operating room or ambulatory surgery center. Typical providers are otolaryngologists (ENT surgeons) performing operative management of refractory maxillary sinus disease.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When work is substantially greater than usual due to extensive disease, prolonged dissection, or unanticipated complexity during the antral mucosal removal. |