Is K63.821 a billable ICD-10-CM code?

No. K63.821 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does K63.821 sit in the tabular list?

Diseases of the digestive system (K00-K95), in the block Other diseases of intestines (K55-K64).

K63.821

K63.821 — Small intestinal bacterial overgrowth

Non-billable headerICD-10-CM

K63.821 is a non-billable header ICD-10-CM code for small intestinal bacterial overgrowth. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

K63.821 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead K63.821

3 child codes. Green means billable.

K63.8211Small intestinal bacterial overgrowth, hydrogen-subtype
K63.8212Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
K63.8219Small intestinal bacterial overgrowth, unspecified

Related codes at this level

Codes that share K63.82. If K63.821 is not quite right, the correct code is usually one of these.

K63.822Small intestinal fungal overgrowth
K63.829Intestinal methanogen overgrowth, unspecified

Questions about K63.821

Is K63.821 a billable ICD-10-CM code?: No. K63.821 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does K63.821 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Other diseases of intestines (K55-K64).