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
534.9 Unspecified as acute or chronic gastrojejunal ulcer; without mention of hemorrhage or perforat →
section notes
534.90   Gastrojejunal ulcer NOS
534.91   Gastrojejun ulc NOS-obst
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