K27.5 Chronic or unspecified peptic ulcer, site unspecified, with perforation

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

Applies from K27 Peptic ulcer, site unspecified

Includes

• gastroduodenal ulcer NOS
• peptic ulcer NOS

Excludes1 (never code together)

• peptic ulcer of newborn (P78.82)

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)

• 533.50 Chronic or unspecified peptic ulcer of unspecified site with perforation, without mention of obstruction (approximate)

Code annotations containing back-references to K27.5

Back-references to K27

• Type 1 Excludes: K25 Gastric ulcer ("peptic ulcer NOS (K27.-)")
• Type 1 Excludes: K26 Duodenal ulcer ("peptic ulcer NOS (K27.-)")
• Type 1 Excludes: K63.3 Ulcer of intestine ("peptic ulcer, site unspecified (K27.-)")
• Type 1 Excludes: K92.2 Gastrointestinal hemorrhage, unspecified ("peptic ulcer with hemorrhage (K25-K28)")

Diagnosis Index entries for K27.5

• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › peptic (site unspecified) › with › perforation
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › peptic (site unspecified) › chronic › with › perforation
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › perforating

Nearby codes

• K27.0 Acute peptic ulcer, site unspecified, with hemorrhage
• K27.1 Acute peptic ulcer, site unspecified, with perforation
• K27.2 Acute peptic ulcer, site unspecified, with both hemorrhage and perforation
• K27.3 Acute peptic ulcer, site unspecified, without hemorrhage or perforation
• K27.4 Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage
• K27.5 Chronic or unspecified peptic ulcer, site unspecified, with perforation (this code)
• K27.6 Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation
• K27.7 Chronic peptic ulcer, site unspecified, without hemorrhage or perforation
• K27.9 Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation