Question: On the superbill, the surgeon coded 31256 and wrote as an extra procedure "maxillary sinusoscopy." I think the otolaryngologist is correct not to bill 31267 because he did not remove tissue. But how should I code the sinusoscopy? Georgia Subscriber Answer: When the otolaryngologist performs a maxillary antrostomy and doesn't remove any tissue, such as a biopsy or polyp, you should instead assign 31256 (Nasal/sinus endoscopy, surgical, with maxillary antrostomy). On the other hand, you should not code the sinusoscopy. Surgical endoscopy (such as 31256-31267) includes diagnostic endoscopy (for instance 31233, Nasal/sinus endoscopy, diagnostic with maxillary sinusoscopy [via inferior meatus or canine fossa puncture]). Answers to You Be the Coder and Reader Questions reviewed by Barbara J. Cobuzzi, MBA, CPC, CPC-H, CPC-P, CENTC, CHCC, president of New Jersey-based CRN Healthcare Solutions.