K28.1 Acute gastrojejunal ulcer with perforation

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applies from K28 Gastrojejunal ulcer

Includes

• anastomotic ulcer (peptic) or erosion
• gastrocolic ulcer (peptic) or erosion
• gastrointestinal ulcer (peptic) or erosion
• gastrojejunal ulcer (peptic) or erosion
• jejunal ulcer (peptic) or erosion
• marginal ulcer (peptic) or erosion
• stomal ulcer (peptic) or erosion

Excludes1 (never code together)

• primary ulcer of small intestine (K63.3)

Use additional code

• code to identify:
• alcohol abuse and dependence (F10.-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 78 — Intestinal Obstruction/Perforation
• CMS-HCC V22: HCC 33 — Intestinal Obstruction/Perforation
• ESRD V24: HCC 33

MS-DRG index

Defines the logic of DRG(s) 380-382 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 534.10 Acute gastrojejunal ulcer with perforation, without mention of obstruction (approximate)

Code annotations containing back-references to K28.1

Back-references to K28

• Type 1 Excludes: K63.3 Ulcer of intestine ("gastrointestinal ulcer (K28.-)")
• Type 1 Excludes: K63.3 Ulcer of intestine ("gastrojejunal ulcer (K28.-)")
• Type 1 Excludes: K63.3 Ulcer of intestine ("jejunal ulcer (K28.-)")
• Type 2 Excludes: K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified ("gastrojejunal ulcer (K28.-)")
• Type 1 Excludes: K92.2 Gastrointestinal hemorrhage, unspecified ("peptic ulcer with hemorrhage (K25-K28)")

Diagnosis Index entries for K28.1

• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › gastrojejunal (peptic) › acute › with › perforation

Nearby codes

• K28 Gastrojejunal ulcer
• K28.0 Acute gastrojejunal ulcer with hemorrhage
• K28.1 Acute gastrojejunal ulcer with perforation (this code)
• K28.2 Acute gastrojejunal ulcer with both hemorrhage and perforation
• K28.3 Acute gastrojejunal ulcer without hemorrhage or perforation
• K28.4 Chronic or unspecified gastrojejunal ulcer with hemorrhage
• K28.5 Chronic or unspecified gastrojejunal ulcer with perforation
• K28.6 Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation