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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Appendicitis 540-543 > Other Diseases Of Appendix 543.* > 2007 ICD-9-CM Diagnosis 543.0 Hyperplasia of appendix (lymphoid)  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 543.0 can be accessed here. 543.0 is a specific code that can be used to specify a diagnosis 543.0 contains 2 index entries View the ICD-9-CM Volume 1 543.* hierarchy Index entries containing 543.0: Hyperplasia, hyperplastic appendix (lymphoid) 543.0 lymphoid (diffuse) (nodular) 785.6 appendix 543.0