Is K31 a billable ICD-10-CM code?

No. K31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does K31 sit in the tabular list?

Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).

K31

K31 — Other diseases of stomach and duodenum

Non-billable headerICD-10-CM

K31 is a non-billable header ICD-10-CM code for other diseases of stomach and duodenum. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
diverticulum of duodenum (K57.00-K57.13)

Includes

Conditions this code covers.

functional disorders of stomach

Other codes that can never be billed with K31

These codes carry an Excludes1 note pointing at K31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K31 alone.

K31.2Hourglass stricture and stenosis of stomach
K56Paralytic ileus and intestinal obstruction without hernia
K63.2Fistula of intestine
K92.2Gastrointestinal hemorrhage, unspecified

Risk adjustment

K31 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 K31

11 child codes. Green means billable.

Questions about K31

Is K31 a billable ICD-10-CM code?: No. K31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does K31 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).