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
533.3 Peptic ulcer, site unspecified; Acute without mention of hemorrhage and perforation →
section notes
533.30   Acute peptic ulcer NOS
533.31   Ac peptic ulcer NOS-obst
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