C66 (Malignant neoplasm of ureter) compared with Z85.54 (Personal history of malignant neoplasm of ureter), from the official CMS tabular data. Z85.54 is the personal-history/screening code for the active disease C66 names.
Personal-history or screening code versus the active disease.
Active disease for this site (ureter)
A personal-history code describes a condition that no longer exists and is no longer being treated, so it is not interchangeable with the active-disease code for the same site.
Source: CMS Table of Neoplasms (site match derived from the code title)
History or screening versus active disease. Z85.54 is the personal-history or screening code for the active disease C66 names.
Site match derived from the code’s own title against the CMS Table of Neoplasms. A personal-history code describes a condition that no longer exists and is no longer being treated, so it is not interchangeable with the active-disease code.
| C66Malignant neoplasm of ureter | Z85.54Personal history of malignant neoplasm of ureter | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Malignant neoplasm of ureter is a non-billable ICD-10-CM category code (C66). | Personal history of malignant neoplasm of ureter is a billable ICD-10-CM diagnosis code (Z85.54). |
| Use additional code | — | code to identify: alcohol use and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) |
| Code first | — | any follow-up examination after treatment of malignant neoplasm (Z08) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources