533 Peptic ulcer, site unspecified
Includes: gastroduodenal ulcer NOS
peptic ulcer NOS
stress ulcer NOS
Use additional E code to identify drug, if drug-induced
Excludes: peptic ulcer:
duodenal (532.0-532.9)
gastric (531.0-531.9)
The following fifth-digit subclassification is for use with category 533:
0 without mention of obstruction
1 with obstruction
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