D05 (Carcinoma in situ of breast) compared with Z12.3 (Encounter for screening for malignant neoplasm of breast), from the official CMS tabular data. Z12.3 is the personal-history/screening code for the active disease D05 names. MedCoder-derived
Personal-history or screening code versus the active disease.
In-situ disease for this site (breast)
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. Z12.3 is the personal-history or screening code for the active disease D05 names.
Site match derived from the code’s own title against the CMS/CDC 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.
| D05Carcinoma in situ of breast | Z12.3Encounter for screening for malignant neoplasm of breast | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Carcinoma in situ of breast is a non-billable ICD-10-CM category code (D05). | Encounter for screening for malignant neoplasm of breast is a non-billable ICD-10-CM category code (Z12.3). |
| Includes | Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia | — |
| 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