C66
Non-billableMalignant neoplasm of ureter
C66 is the ICD-10-CM code for Malignant neoplasm of ureter. It is a non-billable category code — use a more specific child code such as C66.1 for billing.
- Status
- Header (non-billable)
- Chapter
- C00-D49
- Subcodes
- 3
- Edition
- FY2026
C00-D49 Neoplasms
What this means — in plain language
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Excludes1 — not coded here
- •malignant neoplasm of ureteric orifice of bladder (C67.6)
Frequently asked questions
- What is ICD-10 code C66?
- C66 is the ICD-10-CM code for "Malignant neoplasm of ureter". It falls under C00-D49 Neoplasms.
- Is C66 a billable code?
- No — C66 is a non-billable header code. Use a more specific child code (such as C66.1) for billing.
- What is excluded from C66?
- Excludes1 (not coded here): malignant neoplasm of ureteric orifice of bladder (C67.6).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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