ICD-10-CM Q90.1: Trisomy 21, mosaicism (mitotic nondisjunction)

Parent Code (Less Specific):

About ICD-10-CM Code Q90.1 (Trisomy 21)

ICD-10-CM code Q90.1 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 Q90.1 became effective on October 1, 2024.

This page provides detailed information about Q90.1 - Trisomy 21, mosaicism (mitotic nondisjunction). 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 Trisomy 21 related to mosaicism.