K31.A11 Gastric intestinal metaplasia without dysplasia, involving the antrum

Billable ICD-10-CM code, FY2026.

Applies from K31 Other diseases of stomach and duodenum

Includes

• functional disorders of stomach

Excludes2 (not included here)

• diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
• diverticulum of duodenum (K57.00-K57.13)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Code annotations containing back-references to K31.A11

Back-references to K31

• Type 2 Excludes: K59 Other functional intestinal disorders ("functional disorders of stomach (K31.-)")

Diagnosis Index entries for K31.A11

• Metaplasia › gastric intestinal › without dysplasia › involving › antrum

Nearby codes

• K31.89 Other diseases of stomach and duodenum
• K31.9 Disease of stomach and duodenum, unspecified
• K31.A Gastric intestinal metaplasia
• K31.A0 Gastric intestinal metaplasia, unspecified
• K31.A1 Gastric intestinal metaplasia without dysplasia
• K31.A11 Gastric intestinal metaplasia without dysplasia, involving the antrum (this code)
• K31.A12 Gastric intestinal metaplasia without dysplasia, involving the body (corpus)
• K31.A13 Gastric intestinal metaplasia without dysplasia, involving the fundus
• K31.A14 Gastric intestinal metaplasia without dysplasia, involving the cardia
• K31.A15 Gastric intestinal metaplasia without dysplasia, involving multiple sites
• K31.A19 Gastric intestinal metaplasia without dysplasia, unspecified site