ICD-10-CM 2027
ICD-10 code for gastric mucosa congenital displacement
From the official ICD-10-CM alphabetic index entry “Displacement, displaced › gastric mucosa (congenital)”. Page updated September 29, 2026.
About coding gastric mucosa congenital displacement
The ICD-10-CM code for gastric mucosa congenital displacement is Q40.2 (Other specified congenital malformations of stomach).
Within Q40, choose Q40.2 (Other specified congenital malformations of stomach) only when documentation doesn't support a more specific option: congenital hypertrophic pyloric stenosis (Q40.0), congenital hiatus hernia (Q40.1), congenital malformation of stomach, unspecified (Q40.3), other specified congenital malformations of upper alimentary tract (Q40.8) and congenital malformation of upper alimentary tract, unspecified (Q40.9).
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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), 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 gastric mucosa congenital displacement ICD-10 codes
What is the ICD-10 code for gastric mucosa congenital displacement?
- Q40.2 — Other specified congenital malformations of stomach.
Is Q40.2 billable?
- Yes. Q40.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q40.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q40.2 as a principal diagnosis.
Is Q40.2 a CC or MCC?
- No. Q40.2 is neither a CC nor an MCC under MS-DRG v44.0.