ICD-10-CM > Z00-Z99 > Z77-Z99 > Z85 > Z85.2 > Z85.23 Z85.23 Personal history of malignant neoplasm of thymus Non-Billable/Non-Specific Codes Z85.230Personal history of malignant carcinoid tumor of thymusZ85.238Personal history of other malignant neoplasm of thymus