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C48.2 vs Z12.81

C48.2 (Malignant neoplasm of peritoneum, unspecified) compared with Z12.81 (Encounter for screening for malignant neoplasm of oral cavity), from the official CMS tabular data. Z12.81 is the personal-history/screening code for the active disease C48.2 names. MedCoder-derived

Relationship

Review

Condition lifecycle relationship

Z12.81
Encounter for screening for malignant neoplasm of oral cavity
↔
C48.2
Malignant neoplasm of peritoneum, unspecified

Personal-history or screening code versus the active disease.

Active disease for this site (cavity)

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. Z12.81 is the personal-history or screening code for the active disease C48.2 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

C48.2Malignant neoplasm of peritoneum, unspecifiedZ12.81Encounter for screening for malignant neoplasm of oral cavity
Billing statusBillableBillable
ClassificationC00-D49 — NeoplasmsZ00-Z99 — Factors influencing health status and contact with health services
DefinitionMalignant neoplasm of peritoneum, unspecified is a billable ICD-10-CM diagnosis code (C48.2).Encounter for screening for malignant neoplasm of oral cavity is a billable ICD-10-CM diagnosis code (Z12.81).
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