Is K63.821 a billable code?
No. K63.821 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
K63.821: Small intestinal bacterial overgrowth
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
K63.821 groups related diagnoses under small intestinal bacterial overgrowth. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under K63.821
- K63.8211Small intestinal bacterial overgrowth, hydrogen-subtype
- K63.8212Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
- K63.8219Small intestinal bacterial overgrowth, unspecified
Other codes in K63.82 Intestinal microbial overgrowth
K63.821 questions
What does K63.821 mean?
K63.821 is the ICD-10-CM code for Small intestinal bacterial overgrowth. It is in chapter 11, Diseases of the digestive system (K00-K95).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.