ICD-10-CM K63.821: Small intestinal bacterial overgrowth

ICD-10-CM Diagnosis Code (2025)

Official Description for K63.821

Small intestinal bacterial overgrowth

Parent Code (Less Specific):

About ICD-10-CM Code K63.821 (Small intestinal bacterial overgrowth)

ICD-10-CM code K63.821 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 K63.821 became effective on October 1, 2024.

This page provides detailed information about K63.821 - Small intestinal bacterial overgrowth. 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 Small intestinal bacterial overgrowth.