ICD-10-CM > K00-K95 > K35-K38 > K38 K38 Other diseases of appendix Non-Billable/Non-Specific Codes K38.0Hyperplasia of appendixK38.1Appendicular concretionsK38.2Diverticulum of appendixK38.3Fistula of appendixK38.8Other specified diseases of appendixK38.9Disease of appendix, unspecified