Summary & Overview
CPT 31205: External Ethmoid Sinusotomy, Removal of Diseased Contents
CPT code 31205 represents an external surgical approach to the ethmoid sinuses to clear diseased contents. The procedure is used when access through the nasal passages is not appropriate or feasible and involves surgical debridement of the ethmoid sinus. Nationally, this code is relevant to otolaryngology surgical practices, hospital surgical departments, and ambulatory surgery centers that manage complex sinus disease.
Key payers considered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and payment policies can vary across these payers, affecting authorization requirements, site-of-service considerations, and documentation expectations.
Readers will gain a concise understanding of the clinical context for CPT code 31205, expected sites of service, and the scope of the procedure. The publication also outlines what to monitor in payer policy updates, typical documentation elements necessary to support medical necessity, and how this code fits within the broader set of sinus surgery services. Data not available in the input is noted where applicable, including specific payer rates, associated taxonomies, and linked ICD-10 diagnoses.
Billing Code Overview
CPT code 31205 describes a surgical procedure in which the provider accesses the ethmoid sinuses through an approach other than through the nose to remove diseased sinus contents. The service is an ethmoid sinusotomy via an external approach intended to clear infection, debris, or other pathological material from the ethmoid sinus cavities.
Service type: Surgical debridement/removal of diseased sinus contents (external ethmoid sinus procedure)
Typical site of service: Hospital operating room or ambulatory surgical center, where surgical access outside the nasal passages is performed under appropriate anesthesia.
Clinical & Coding Specifications
Clinical Context
A 48-year-old male presents to otolaryngology with persistent unilateral facial pressure, purulent nasal drainage, and anosmia despite a 6-week course of medical therapy including oral antibiotics and topical nasal corticosteroids. CT imaging demonstrates opacification of the anterior and posterior ethmoid air cells with evidence of mucosal disease and obstruction of the ethmoid infundibulum. The surgeon schedules a transcranial or external approach (other than transnasal endoscopic) to access the ethmoid sinuses due to altered nasal anatomy from prior extensive septorhinoplasty and scarring that precludes safe endoscopic access. In the operating room under general anesthesia, the provider uses an external approach to enter the ethmoid cavity, evacuates diseased mucous and polyps, performs limited ethmoidectomy to restore drainage, and achieves hemostasis.
This procedure typically follows preoperative evaluation (history, nasal endoscopy, CT), informed consent, and perioperative antibiotics as indicated. Postoperative workflow includes nasal packing or splints if needed, postoperative pain control, antibiotic and saline irrigations, and follow-up nasal endoscopy to monitor healing and removal of any dressings or stents.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required to perform the procedure is substantially greater than typical due to extensive disease or difficult exposure. |