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C14.8 vs D00.00

C14.8 (Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx) compared with D00.00 (Carcinoma in situ of oral cavity, unspecified site), from the official CMS tabular data. C14.8 and D00.00 name the same anatomical site (oral) with a different neoplasm behavior. MedCoder-derived

Relationship

Informational

Neoplasm table relationship

C14.8
Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx
↔
D00.00
Carcinoma in situ of oral cavity, unspecified site

Same anatomical site, different neoplasm behavior.

Same site — carcinoma in situ (oral)

The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.

Source: CMS Table of Neoplasms

Can these codes be reported together?

Same site, different neoplasm behavior. C14.8 and D00.00 name the same anatomical site (oral) with a different neoplasm behavior.

From the CMS/CDC Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.

Side by side

C14.8Malignant neoplasm of overlapping sites of lip, oral cavity and pharynxD00.00Carcinoma in situ of oral cavity, unspecified site
Billing statusBillableBillable
ClassificationC00-D49 — NeoplasmsC00-D49 — Neoplasms
DefinitionMalignant neoplasm of overlapping sites of lip, oral cavity and pharynx is a billable ICD-10-CM diagnosis code (C14.8).Carcinoma in situ of oral cavity, unspecified site is a billable ICD-10-CM diagnosis code (D00.00).
Includes
Primary malignant neoplasm of two or more contiguous sites of lip, oral cavity and pharynx
Bowen's disease
erythroplasia
grade III intraepithelial neoplasia
Queyrat's erythroplasia
Use additional code
code to identify:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
code to identify:
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
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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