ICD-9-CM Vol. 1 Diagnostic Codes →
9. DISEASES OF THE DIGESTIVE SYSTEM (520-579) →
section notes
DISEASES OF ESOPHAGUS, STOMACH, AND DUODENUM (530-539) →
section notes
534 Gastrojejunal ulcer →
section notes
534.2 Acute gastrojejunal ulcer; with hemorrhage and perforation →
section notes
534.20   Ac margin ulc w hem/perf
534.21   Ac marg ulc hem/perf-obs
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