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
534.7 Chronic gastrojejunal ulcer; without mention of hemorrhage or perforation →
section notes
534.70   Chr marginal ulcer NOS
534.71   Chr marginal ulc NOS-obs
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