C53.1 (Malignant neoplasm of exocervix) compared with Z12.4 (Encounter for screening for malignant neoplasm of cervix), from the official CMS tabular data. Z12.4 is the personal-history/screening code for the active disease C53.1 names.
Personal-history or screening code versus the active disease.
Active disease for this site (cervix)
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. Z12.4 is the personal-history or screening code for the active disease C53.1 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.
| C53.1Malignant neoplasm of exocervix | Z12.4Encounter for screening for malignant neoplasm of cervix | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | Z00-Z99 — Factors influencing health status and contact with health services |
| Definition | Malignant neoplasm of exocervix is a billable ICD-10-CM diagnosis code (C53.1). | Encounter for screening for malignant neoplasm of cervix is a billable ICD-10-CM diagnosis code (Z12.4). |
| Includes | malignant neoplasm of skin of female genital organs | Encounter for screening pap smear for malignant neoplasm of cervix |
| Use additional code | — | code to identify any family history of malignant neoplasm (Z80.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources