K63.821
Non-billableSmall intestinal bacterial overgrowth
K63.821 is the ICD-10-CM code for Small intestinal bacterial overgrowth. It is a non-billable category code — use a more specific child code such as K63.8211 for billing.
K00-K95 Diseases of the digestive system
No additional coding notes for this code.
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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