C66 is the authoritative medical code for Malignant neoplasm of ureter. This classification is used in medical billing and clinical recording to specify the clinical criteria for malignant neoplasm of ureter (ICD-10-CM C66), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Sequencing, inclusion, and exclusion notes published for C66 in the official ICD-10-CM tabular list.
Conditions that can never be reported with this code; the two are mutually exclusive.
No. C66 (Malignant neoplasm of ureter) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Per Excludes1 instructions, C66 must not be reported with: malignant neoplasm of ureteric orifice of bladder (C67.6).
Official ICD-10-CM classifications in the same code family as C66, with their registry titles.
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: