Nasal endoscopy is a quick, in-office procedure where a doctor inserts a thin, lighted scope into your nose to get a detailed view of your nasal passages and sinuses. The whole thing typically takes 1 to 5 minutes, requires no sedation, and you can drive yourself home afterward. It’s one of the most common diagnostic tools in ear, nose, and throat (ENT) medicine.
Why Doctors Order a Nasal Endoscopy
Your doctor might recommend nasal endoscopy if you have persistent nasal symptoms that aren’t responding to treatment or that need a closer look. Common reasons include chronic congestion or stuffiness, repeated sinus infections, nasal polyps, unexplained nosebleeds, loss of smell, and post-nasal drip that won’t quit. It’s also used to monitor healing after sinus surgery or to investigate a mass or growth spotted on imaging.
Standard imaging like a CT scan shows the bone structure of your sinuses, but it can’t reveal the condition of the tissue lining those spaces. A nasal endoscopy lets your doctor see inflammation, pus, swelling, or polyps in real time, and even take a tissue sample if something looks abnormal.
Rigid vs. Flexible Scopes
Two types of endoscopes are used for this procedure. A flexible scope is a thin, bendable tube with a camera and light at the tip. It’s the most common choice for diagnostic exams because patients tolerate it well, it provides excellent views, and it can be done right in the office with no sedation. A rigid scope is a straight, stiff instrument that gives a wider, sharper image. Rigid scopes are more often used during surgical procedures, such as removing polyps, collecting tissue biopsies, or extracting foreign objects, and they typically require sedation in an operating room.
For a standard diagnostic nasal endoscopy, you’ll almost certainly get the flexible version.
What Happens During the Procedure
No fasting or special preparation is needed beforehand. You sit upright in an exam chair, and the doctor sprays or applies a numbing agent inside your nose. This is usually a topical anesthetic like lidocaine, which kicks in within 2 to 5 minutes. A decongestant spray is often applied at the same time to shrink the nasal tissues and open up the passageways, making room for the scope and improving the view.
Once your nose is numb, the doctor gently slides the scope into one nostril. The camera sends a live image to a screen, and the doctor slowly advances the scope through your nasal cavity, examining the tissue along the way. They’ll look at the septum (the wall dividing your nostrils), the turbinates (ridges of tissue that warm and humidify air), and the openings to your sinuses. The scope may also be passed into the other nostril for a complete picture.
You’ll feel pressure and possibly an odd sensation, but it shouldn’t be painful. Some people find it mildly uncomfortable, similar to the feeling of water going up your nose. The entire process, from numbing to scope removal, usually wraps up in under 5 minutes.
After the Procedure
You can resume normal activities right away. The most common side effects are slight soreness in your nose and throat and mild nosebleeds, both of which typically resolve on their own within a couple of days. Serious complications are rare but can include an allergic reaction to the numbing agent or decongestant, fainting, or infection.
Your doctor will often discuss preliminary findings with you immediately after the exam, since they’re viewing the images in real time. If a biopsy was taken, those results usually come back within a few days to a week.
What It Costs
Nasal endoscopy is billed under CPT code 31231 for a basic diagnostic exam. The cost varies widely depending on your location and provider. Data from New Hampshire, for example, shows charges ranging from about $279 to $1,682, with a statewide average around $1,322. If you have insurance, your out-of-pocket share will depend on your plan’s coverage and whether you’ve met your deductible. Because this is an in-office procedure rather than a hospital-based one, costs tend to be lower when performed in an ENT clinic.
What the Results Can Show
A normal result means your nasal lining looks healthy, with no signs of polyps, swelling, infection, or structural abnormalities. An abnormal result might reveal inflamed or swollen tissue consistent with chronic sinusitis, nasal polyps blocking sinus drainage, a deviated septum contributing to your symptoms, signs of a fungal infection, or a tumor or unusual growth that needs further evaluation.
Based on what the endoscopy reveals, your doctor may adjust your medications, recommend a CT scan for additional detail, schedule a follow-up endoscopy to track changes, or refer you for surgery if a structural issue or growth needs to be addressed. For many people, the endoscopy provides the missing piece of information that finally explains months or years of nasal symptoms.