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
531 Gastric ulcer
section notes
531.9 Unspecified as acute or chronic gastric ulcer; without mention of hemorrhage or perforation
section notes
531.90 | Stomach ulcer NOS | |||
531.91 | Stomach ulcer NOS-obstr |
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