ICD-10-CM 2027
ICD-10 code for ostium defect
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Defect, defective › ostium”. Page updated September 29, 2026.
About coding ostium defect
The official ICD-10-CM index doesn't give a single default code for ostium defect; the code depends on the details below.