What is the ICD-10-CM code for branchial cleft cyst?

• A. Q18.0
• B. O85
• C. Z38.00
• D. A05.1

Answer: (A)

The ICD-10-CM code for a branchial cleft cyst is Q18.0. This code specifically classifies congenital anomalies related to the branchial cleft, which are developmental defects that arise from the embryonic process. A branchial cleft cyst is a common type of congenital neck mass, typically appearing as a fluid-filled sac that develops near the neck area due to incomplete closure of the branchial clefts during fetal development.

The coding system is designed to categorize various conditions effectively, using a specific alphanumeric system. Q18.0 specifically indicates this type of cyst, differentiating it from other conditions. This precision is crucial for documentation, treatment, and billing purposes in medical records.

Other options provided do not pertain to branchial cleft cysts. For instance, O85 relates to complications of childbirth, Z38.00 pertains to liveborn infants, and A05.1 is used for specific types of infectious diarrhea. Thus, the selection of Q18.0 appropriately identifies the condition in question.