Summary & Overview
CPT 31090: Surgical Drainage of Three or More Paranasal Sinuses
CPT code 31090 captures a surgical procedure in which three or more paranasal sinuses are approached, incised, and cleared of diseased material. As a multisinus surgical drainage code, it represents more extensive care than single- or two-sinus procedures and is used in the management of complicated or refractory sinusitis. Nationally, the code matters for coding specificity, procedural categorization, and resource allocation for otolaryngology surgical services.
Key payers addressed in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context about the procedure type and typical site of service, plus an outline of what to expect in analytical sections: utilization benchmarks, coding and billing considerations, and policy or coverage factors that commonly affect authorization and reimbursement. Where payer-specific guidance exists, the publication summarizes common coverage themes and prior authorization patterns for multisinus surgical drainage.
This summary provides a concise reference for coding professionals, surgical departments, and policy analysts to understand the clinical intent of CPT code 31090, the national relevance of accurate coding for multisinus procedures, and the topics explored in the full publication, including benchmarks, payer policy implications, and clinical context. Data not available in the input will be noted in relevant sections.
Billing Code Overview
CPT code 31090 describes a surgical procedure in which the provider approaches three or more paranasal sinuses, makes incisions, and removes diseased contents. This approach may be used to treat sinusitis affecting multiple sinuses.
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Service type: Surgical drainage and debridement of multiple paranasal sinuses
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Typical site of service: Operating room or ambulatory surgical center, performed by an otolaryngologist (ENT) or surgical team experienced in sinus surgery
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 35–60 year-old adult presenting to an otolaryngology clinic with several weeks of facial pressure, purulent nasal drainage, decreased sense of smell, and recurrent or refractory acute bacterial sinusitis despite appropriate medical therapy (oral antibiotics, intranasal steroids, and saline irrigations). Imaging with sinus CT demonstrates multi-sinus disease involving at least three paranasal sinuses (maxillary, ethmoid, frontal and/or sphenoid) with retained secretions and mucosal thickening. After failure of conservative care or in the presence of complications (orbital pain, recurrent acute exacerbations, or obstructive disease), the patient is scheduled for endoscopic surgical drainage and debridement of three or more paranasal sinuses under general anesthesia.
Preoperative workflow includes history and physical, review of CT imaging, informed consent documenting need to approach three or more sinuses, anesthesia evaluation, and preoperative antibiotics as indicated. The procedure is typically performed in an outpatient ambulatory surgery center or hospital operating room. Intraoperative steps include nasal endoscopy, uncinectomy and maxillary sinusotomy if needed, anterior and/or posterior ethmoidectomy, and frontal or sphenoid sinusotomy as indicated, with removal of diseased mucous, polyps, or granulation tissue and hemostasis. Postoperative care includes short-term observation, nasal packing or absorptive dressings if used, discharge with analgesics, topical nasal steroid sprays, saline irrigations, and ENT follow-up for endoscopic debridement and wound care.
Coding Specifications
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