Is K31.9 a billable ICD-10-CM code?

Yes. K31.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does K31.9 sit in the tabular list?

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

K31.9

K31.9 — Disease of stomach and duodenum, unspecified

Billable / specific codeICD-10-CM

K31.9 is a billable, specific ICD-10-CM code for disease of stomach and duodenum, unspecified. It is valid for submission on a claim.

Risk adjustment

K31.9 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.

Medicare coverage

K31.9 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56421Billing and Coding: CT of the Abdomen and Pelvis
A56724Billing and Coding: Wireless Gastrointestinal Motility Monitoring Systems

How K31.9 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K31.9.

Gastropathy
Disease, diseased›duodenum
Disease, diseased›stomach
Disorder›gastric(functional)
Disturbance›stomach(functional)
Dysfunction›pylorus
Lesion›cardia
Lesion›duodenum
Lesion›gastric
Lesion›gastroduodenal
Lesion›pylorus
Lesion›stomach

Related codes at this level

Codes that share K31. If K31.9 is not quite right, the correct code is usually one of these.

Questions about K31.9

Is K31.9 a billable ICD-10-CM code?: Yes. K31.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does K31.9 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).