K31 — Other diseases of stomach and duodenum
Is K31 billable?
No — K31 is a non-billable header code. K31 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 26 billable codes beneath K31.
Billable codes under this header
- K31.0Acute dilatation of stomach
- K31.1Adult hypertrophic pyloric stenosis
- K31.BHypertrophic pyloric stenosis, in childhood
- K31.2Hourglass stricture and stenosis of stomach
- K31.3Pylorospasm, not elsewhere classified
- K31.4Gastric diverticulum
- K31.5Obstruction of duodenum
- K31.6Fistula of stomach and duodenum
- K31.7Polyp of stomach and duodenum
- K31.9Disease of stomach and duodenum, unspecified
- K31.82Dieulafoy lesion (hemorrhagic) of stomach and duodenum
- K31.83Achlorhydria
- K31.84Gastroparesis
- K31.89Other diseases of stomach and duodenum
- K31.A0Gastric intestinal metaplasia, unspecified
- K31.811Angiodysplasia of stomach and duodenum with bleeding
- K31.819Angiodysplasia of stomach and duodenum without bleeding
- K31.A11Gastric intestinal metaplasia without dysplasia, involving the antrum
- K31.A12Gastric intestinal metaplasia without dysplasia, involving the body (corpus)
- K31.A13Gastric intestinal metaplasia without dysplasia, involving the fundus
- K31.A14Gastric intestinal metaplasia without dysplasia, involving the cardia
- K31.A15Gastric intestinal metaplasia without dysplasia, involving multiple sites
- K31.A19Gastric intestinal metaplasia without dysplasia, unspecified site
- K31.A21Gastric intestinal metaplasia with low grade dysplasia
- K31.A22Gastric intestinal metaplasia with high grade dysplasia
- K31.A29Gastric intestinal metaplasia with dysplasia, unspecified
K31 at a glance
| Code | K31 |
|---|---|
| Description | Other diseases of stomach and duodenum |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here
The conditions below are not part of K31, but a patient may have both at the same time. When documentation supports it, K31 and the excluded code may both be reported.
Includes
Conditions classified to K31.
- functional disorders of stomach
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K31, but a patient may have both at the same time. When documentation supports it, K31 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from K20-K31
The conditions below are not part of K31, but a patient may have both at the same time. When documentation supports it, K31 and the excluded code may both be reported.
- hiatus hernia (K44.-)
What codes fall under K31? (12)
- K31.0Acute dilatation of stomach
- K31.1Adult hypertrophic pyloric stenosis
- K31.BHypertrophic pyloric stenosis, in childhood
- K31.2Hourglass stricture and stenosis of stomach
- K31.3Pylorospasm, not elsewhere classified
- K31.4Gastric diverticulum
- K31.5Obstruction of duodenum
- K31.6Fistula of stomach and duodenum
- K31.7Polyp of stomach and duodenum
- K31.8Other specified diseases of stomach and duodenumnot billable
- K31.9Disease of stomach and duodenum, unspecified
- K31.AGastric intestinal metaplasianot billable
How long has K31 existed?
K31 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.