ICD-10-CM Diagnosis Code (2025)
Official Description for Q21.16
Sinus venosus atrial septal defect, unspecified
Coding Notes & Guidelines for Q21.16
Inclusion Terms
Sinus venosus defect, NOS
Parent Code (Less Specific):
About ICD-10-CM Code Q21.16 (Sinus venosus atrial septal defect)
ICD-10-CM code Q21.16 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM Q21.16 became effective on October 1, 2024.
This page provides detailed information about Q21.16 - Sinus venosus atrial septal defect, unspecified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Sinus venosus atrial septal defect related to unspecified.