FY2027 ICD-10-CM reference
K31: Other diseases of stomach and duodenum
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Other diseases of stomach and duodenum. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
CMS-HCC V28
Not applicable to this nonbillable heading
CMS-HCC V24
Not applicable to this nonbillable heading
ESRD
Not applicable to this nonbillable heading
PACE
Not applicable to this nonbillable heading
RxHCC
Not applicable to this nonbillable heading
HHS-HCC
Not applicable to this nonbillable heading
More specific FY2027 codes
- K31.0: Acute dilatation of stomachBillable code
- K31.1: Adult hypertrophic pyloric stenosisBillable code
- K31.B: Hypertrophic pyloric stenosis, in childhoodBillable code
- K31.2: Hourglass stricture and stenosis of stomachBillable code
- K31.3: Pylorospasm, not elsewhere classifiedBillable code
- K31.4: Gastric diverticulumBillable code
- K31.5: Obstruction of duodenumBillable code
- K31.6: Fistula of stomach and duodenumBillable code
- K31.7: Polyp of stomach and duodenumBillable code
- K31.8: Other specified diseases of stomach and duodenumNonbillable heading
- K31.9: Disease of stomach and duodenum, unspecifiedBillable code
- K31.A: Gastric intestinal metaplasiaNonbillable heading
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: K00-K95 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: K00-K95 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: K00-K95 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: K00-K95 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: K00-K95 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: K00-K95 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: K00-K95 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: K00-K95 (chapter, inherited).
Excludes2
hiatus hernia (K44.-)
Source: K20-K31 (section, inherited).
Includes
functional disorders of stomach
Source: K31 (category, direct).
Excludes2
diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
Source: K31 (category, direct).
Excludes2
diverticulum of duodenum (K57.00-K57.13)
Source: K31 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does K31 mean in FY2027?
The official ICD-10-CM descriptor is Other diseases of stomach and duodenum. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is K31 billable in FY2027?
The FY2027 order file marks K31 as a nonbillable heading. Select a complete billable child code.
Does K31 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition