ICD-10-CM 2027
ICD-10 code for Dumping syndrome
From the official ICD-10-CM alphabetic index entry “Dumping syndrome (postgastrectomy)”. Page updated September 29, 2026.
About coding Dumping syndrome
The ICD-10-CM code for Dumping syndrome is K91.1 (Postgastric surgery syndromes).
Within K91 (intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified), K91.1 is specifically for Postgastric surgery syndromes. Related codes cover vomiting following gastrointestinal surgery (K91.0), postsurgical malabsorption, not elsewhere classified (K91.2), postprocedural intestinal obstruction (K91.3), Postcholecystectomy syndrome (K91.5), intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedure (K91.6), accidental puncture and laceration of a digestive system organ or structure during a procedure (K91.7) and other intraoperative and postprocedural complications and disorders of digestive system (K91.8).
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 Dumping syndrome ICD-10 codes
What is the ICD-10 code for Dumping syndrome?
- K91.1 — Postgastric surgery syndromes.
Is K91.1 billable?
- Yes. K91.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K91.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K91.1 as a principal diagnosis.
Is K91.1 a CC or MCC?
- No. K91.1 is neither a CC nor an MCC under MS-DRG v44.0.