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ICD-9-CM
9. DISEASES OF THE DIGESTIVE SYSTEM (520-579)
APPENDICITIS (540-543)
APPENDICITIS (540-543)
540 Acute appendicitis
540.0-540.9
541 Appendicitis, unqualified
541-541
542 Other appendicitis
542-542
543 Other diseases of appendix
543.0-543.9