ICD-10-CM 2027
ICD-10 code for Mallory-Weiss syndrome
Gastro-esophageal laceration-hemorrhage syndrome
From the official ICD-10-CM alphabetic index entry “Mallory-Weiss syndrome”. Page updated September 29, 2026.
About coding Mallory-Weiss syndrome
The ICD-10-CM code for Mallory-Weiss syndrome is K22.6 (Gastro-esophageal laceration-hemorrhage syndrome).
Within K22 (other diseases of esophagus), K22.6 is specifically for Gastro-esophageal laceration-hemorrhage syndrome. Related codes cover Achalasia of cardia (K22.0), ulcer of esophagus (K22.1), esophageal obstruction (K22.2), perforation of esophagus (K22.3), dyskinesia of esophagus (K22.4), diverticulum of esophagus, acquired (K22.5), Barrett's esophagus (K22.7), other specified diseases of esophagus (K22.8) and 1 more.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 368 (Major Esophageal Disorders with MCC, relative weight 1.6433), DRG 369 (Major Esophageal Disorders with CC, relative weight 0.9922) and DRG 370 (Major Esophageal Disorders without CC/MCC, relative weight 0.6744), 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 Mallory-Weiss syndrome ICD-10 codes
What is the ICD-10 code for Mallory-Weiss syndrome?
- K22.6 — Gastro-esophageal laceration-hemorrhage syndrome.
Is K22.6 billable?
- Yes. K22.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K22.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K22.6 as a principal diagnosis.
Is K22.6 a CC or MCC?
- K22.6 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.