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C18.3 vs Z12.13

C18.3 (Malignant neoplasm of hepatic flexure) 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 C18.3 names.

Relationship

Review

Condition lifecycle relationship

Z12.13
Encounter for screening for malignant neoplasm of small intestine
↔
C18.3
Malignant neoplasm of hepatic flexure

Personal-history or screening code versus the active disease.

Active 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 C18.3 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.

Side by side

C18.3Malignant neoplasm of hepatic flexureZ12.13Encounter for screening for malignant neoplasm of small intestine
Billing statusBillableBillable
ClassificationC00-D49 — NeoplasmsZ00-Z99 — Factors influencing health status and contact with health services
DefinitionMalignant neoplasm of hepatic flexure is a billable ICD-10-CM diagnosis code (C18.3).Encounter for screening for malignant neoplasm of small intestine is a billable ICD-10-CM diagnosis code (Z12.13).
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