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C26.9 vs Z80.0

C26.9 (Malignant neoplasm of ill-defined sites within the digestive system) compared with Z80.0 (Family history of malignant neoplasm of digestive organs), from the official CMS tabular data. Z80.0 is the personal-history/screening code for the active disease C26.9 names. MedCoder-derived

Relationship

Review

Condition lifecycle relationship

Z80.0
Family history of malignant neoplasm of digestive organs
↔
C26.9
Malignant neoplasm of ill-defined sites within the digestive system

Personal-history or screening code versus the active disease.

Active disease for this site (digestive organs)

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. Z80.0 is the personal-history or screening code for the active disease C26.9 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

C26.9Malignant neoplasm of ill-defined sites within the digestive systemZ80.0Family history of malignant neoplasm of digestive organs
Billing statusBillableBillable
ClassificationC00-D49 — Neoplasms (C00-D49)Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
DefinitionMalignant neoplasm of ill-defined sites within the digestive system is a billable ICD-10-CM diagnosis code (C26.9).Family history of malignant neoplasm of digestive organs is a billable ICD-10-CM diagnosis code (Z80.0).
Includes
Malignant neoplasm of alimentary canal or tract NOS
Malignant neoplasm of gastrointestinal tract NOS
Conditions classifiable to C15-C26
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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