But you'll still need to look elsewhere to report renal pelvis neoplasms.
When ICD-10-CM replaces ICD-9-CM on Oct. 1, 2013, you'll be stuck reporting a lot of "unspecified" codes if your practice doesn't have its documentation ducks in a row. That's because many of the ICD-10-CM codes require more anatomic location information than ICD-9-CM codes currently do. As an example, take a look at the codes for kidney malignant neoplasms.
ICD-9-CM:
Under ICD-9-CM, you should report a primary malignant kidney neoplasm using 189.0 (Malignant neoplasm of kidney except pelvis). As the code definition specifies, 189.0 is not appropriate for a pelvis neoplasm. [...]