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C14.8 vs D49.0

C14.8 (Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx) compared with D49.0 (Neoplasm of unspecified behavior of digestive system), from the official CMS tabular data. C14.8 and D49.0 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
↔
D49.0
Neoplasm of unspecified behavior of digestive system

Same anatomical site, different neoplasm behavior.

Same site — unspecified behavior (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 D49.0 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 pharynxD49.0Neoplasm of unspecified behavior of digestive system
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).Neoplasm of unspecified behavior of digestive system is a billable ICD-10-CM diagnosis code (D49.0).
Includes
Primary malignant neoplasm of two or more contiguous sites of lip, oral cavity and pharynx
'growth' NOS
neoplasm NOS
new growth NOS
tumor NOS
Use additional code
code to identify:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
—
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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