Summary & Overview
CPT 42550: Sialography (Radiosialography) of Salivary Gland Ducts
CPT code 42550 designates a sialography (radiosialography), a diagnostic imaging procedure used to visualize the salivary gland ductal system. Nationally, this code is relevant for evaluating obstructive and inflammatory conditions of the salivary glands and for planning interventions. The procedure is typically performed in outpatient radiology settings, ambulatory imaging centers, or hospital radiology departments.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise briefing on clinical context and billing considerations for CPT code 42550, and outlines what readers can expect regarding common billing practices and programmatic coverage patterns. It highlights benchmarks and utilization context where available, summarizes clinical indications that drive use of sialography, and flags policy or documentation areas that commonly affect claim processing.
Readers will learn the clinical purpose of the procedure, typical sites of service, and which payers are most relevant for national coverage conversations. Where specific payer policy details, taxonomies, or diagnosis crosswalks are not provided in the input, the report notes that such data are not available and focuses on the available clinical and billing description.
Billing Code Overview
CPT code 42550 describes a sialography (radiosialography), an imaging procedure that visualizes the salivary gland ductal system using contrast and radiographic techniques. This service is used to evaluate salivary gland obstruction, ductal strictures, sialadenitis, and related ductal pathology.
Service Type: Diagnostic imaging procedure focused on salivary gland ductal anatomy
Typical Site of Service: Outpatient radiology or ambulatory imaging centers; may also be performed in hospital radiology departments
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A patient in their mid-40s presents to an otolaryngology clinic with recurrent painful swelling of the submandibular gland associated with meals and a recent episode of purulent discharge from the duct. The otolaryngologist performs a focused history and physical, documents signs of sialadenitis and a possible ductal obstruction (sialolithiasis). After conservative measures (hydration, sialogogues, antibiotics) provide incomplete resolution, the clinician orders a 42550 sialography to visualize the salivary gland ductal system and identify filling defects, strictures, or ductal discontinuity.
The clinical workflow: the patient is scheduled in an outpatient radiology or otolaryngology procedure suite. The procedure is performed by an otolaryngologist or oral and maxillofacial surgeon with a radiology technologist and fluoroscopy capable imaging. After topical anesthetic and cannulation of the duct, contrast is gently injected while fluoroscopic images are obtained. Images are archived in the PACS system and a written radiology report documents ductal anatomy, presence/location of stones, strictures, extravasation, or sialectasia. Post-procedure instructions and follow-up for potential therapeutic interventions (endoscopic stone removal, duct dilation, or gland excision) are provided.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component |