ICD-10-CM 2027
ICD-10 code for stomach hyperactive
From the official ICD-10-CM alphabetic index entry “Hyperactive, hyperactivity › stomach”. Page updated September 29, 2026.
About coding stomach hyperactive
The ICD-10-CM code for stomach hyperactive is K31.89 (Other diseases of stomach and duodenum).
Within K31.8, choose K31.89 (Other diseases of stomach and duodenum) only when documentation doesn't support a more specific option: Angiodysplasia of stomach and duodenum (K31.81), Dieulafoy lesion (hemorrhagic) of stomach and duodenum (K31.82), Achlorhydria (K31.83) and Gastroparesis (K31.84).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about stomach hyperactive ICD-10 codes
What is the ICD-10 code for stomach hyperactive?
- K31.89 — Other diseases of stomach and duodenum.
Is K31.89 billable?
- Yes. K31.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K31.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K31.89 as a principal diagnosis.
Is K31.89 a CC or MCC?
- No. K31.89 is neither a CC nor an MCC under MS-DRG v44.0.