2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Malignant Neoplasm Of Genitourinary Organs 179-189 > ICD-9-CM Diagnosis 186 Malignant neoplasm of testis Malignant neoplasms of the testicles 186 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 186.0 Malignant neoplasm of undescended testis 186.0 is a specific code that can be used to specify a diagnosis 186.0 contains 3 index entries ICD-9-CM Diagnosis 186.9 Malignant neoplasm of other and unspecified testis Malignant neoplasms of the testicles 186.9 is a specific code that can be used to specify a diagnosis 186.9 contains 24 index entries