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
533 Peptic ulcer, site unspecified →
section notes
533.7 Peptic ulcer, site unspecified; Chronic without mention of hemorrhage or perforation →
section notes
533.70   Chronic peptic ulcer NOS
533.71   Chr peptic ulcer NOS-obs
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