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D20.1 vs Z85.818

D20.1 (Benign neoplasm of soft tissue of peritoneum) compared with Z85.818 (Personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx), from the official CMS tabular data. Z85.818 is the personal-history/screening code for the active disease D20.1 names. MedCoder-derived

Relationship

Review

Condition lifecycle relationship

Z85.818
Personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx
↔
D20.1
Benign neoplasm of soft tissue of peritoneum

Personal-history or screening code versus the active disease.

Benign neoplasm of 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. Z85.818 is the personal-history or screening code for the active disease D20.1 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

D20.1Benign neoplasm of soft tissue of peritoneumZ85.818Personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx
Billing statusBillableBillable
ClassificationC00-D49 — Neoplasms (C00-D49)Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99)
DefinitionBenign neoplasm of soft tissue of peritoneum is a billable ICD-10-CM diagnosis code (D20.1).Personal history of malignant neoplasm of other sites of lip, oral cavity, and pharynx is a billable ICD-10-CM diagnosis code (Z85.818).
Use additional code—
code to identify:
alcohol use and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
Code first—
any follow-up examination after treatment of malignant neoplasm (Z08)
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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