Sinusitis/Nasal Congestion: 99203 or 99204, 31231. Snoring/Sleep Apnea: 99203 or 99204, 31575. CT Scan of Sinuses: 99213 or 99214, 70486. If you have a deductible within your insurance plan, you are responsible for any charges until your deductible is met. Here is a little cheat sheet on the most common types of insurance plans..