D01.4 vs Z12.13

D01.4 (Carcinoma in situ of other and unspecified parts of intestine) compared with Z12.13 (Encounter for screening for malignant neoplasm of small intestine), from the official CMS tabular data. Z12.13 is the personal-history/screening code for the active disease D01.4 names. MedCoder-derived

Relationship

Review

Condition lifecycle relationship

Z12.13

Encounter for screening for malignant neoplasm of small intestine

↔

D01.4

Carcinoma in situ of other and unspecified parts of intestine

Personal-history or screening code versus the active disease.

In-situ disease for this site (intestine)

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)

Can these codes be reported together?

History or screening versus active disease. Z12.13 is the personal-history or screening code for the active disease D01.4 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.

Side by side

	D01.4Carcinoma in situ of other and unspecified parts of intestine	Z12.13Encounter for screening for malignant neoplasm of small intestine
Billing status	Non-billable header Report instead: D01.40, D01.49	Billable
Classification	C00-D49 — Neoplasms	Z00-Z99 — Factors influencing health status and contact with health services
Definition	Carcinoma in situ of other and unspecified parts of intestine is a non-billable ICD-10-CM category code (D01.4).	Encounter for screening for malignant neoplasm of small intestine is a billable ICD-10-CM diagnosis code (Z12.13).
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.-)

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources