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D09.9 vs Z85.819

D09.9 (Carcinoma in situ, unspecified) compared with Z85.819 (Personal history of malignant neoplasm of unspecified site of lip, oral cavity, and pharynx), from the official CMS tabular data. Z85.819 is the personal-history/screening code for the active disease D09.9 names.

Relationship

Review

Condition lifecycle relationship

Z85.819
Personal history of malignant neoplasm of unspecified site of lip, oral cavity, and pharynx
↔
D09.9
Carcinoma in situ, unspecified

Personal-history or screening code versus the active disease.

In-situ disease for this site (unspecified site)

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. Z85.819 is the personal-history or screening code for the active disease D09.9 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

D09.9Carcinoma in situ, unspecifiedZ85.819Personal history of malignant neoplasm of unspecified site of lip, oral cavity, and pharynx
Billing statusBillableBillable
ClassificationC00-D49 — NeoplasmsZ00-Z99 — Factors influencing health status and contact with health services
DefinitionCarcinoma in situ, unspecified is a billable ICD-10-CM diagnosis code (D09.9).Personal history of malignant neoplasm of unspecified site of lip, oral cavity, and pharynx is a billable ICD-10-CM diagnosis code (Z85.819).
Includes
Bowen's disease
erythroplasia
grade III intraepithelial neoplasia
Queyrat's erythroplasia
—
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