ICD-10-CM > C00-D49 > D37-D48 > D40 > D40.1 D40.1 Neoplasm of uncertain behavior of testis Non-Billable/Non-Specific Codes D40.10Neoplasm of uncertain behavior of unspecified testisD40.11Neoplasm of uncertain behavior of right testisD40.12Neoplasm of uncertain behavior of left testis