D04.2 vs D23.2

D04.2 (Carcinoma in situ of skin of ear and external auricular canal) compared with D23.2 (Other benign neoplasm of skin of ear and external auricular canal), from the official CMS tabular data. D04.2 and D23.2 name the same anatomical site (auditory) with a different neoplasm behavior.

Relationship

Informational

Neoplasm table relationship

D04.2

Carcinoma in situ of skin of ear and external auricular canal

↔

D23.2

Other benign neoplasm of skin of ear and external auricular canal

Same anatomical site, different neoplasm behavior.

Same site — benign neoplasm (auditory)

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. D04.2 and D23.2 name the same anatomical site (auditory) with a different neoplasm behavior.

From the CMS 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

	D04.2Carcinoma in situ of skin of ear and external auricular canal	D23.2Other benign neoplasm of skin of ear and external auricular canal
Billing status	Non-billable header Report instead: D04.20, D04.21, D04.22	Non-billable header Report instead: D23.20, D23.21, D23.22
Classification	C00-D49 — Neoplasms	C00-D49 — Neoplasms
Definition	Carcinoma in situ of skin of ear and external auricular canal is a non-billable ICD-10-CM category code (D04.2).	Other benign neoplasm of skin of ear and external auricular canal is a non-billable ICD-10-CM category code (D23.2).
Includes	Bowen's disease erythroplasia grade III intraepithelial neoplasia Queyrat's erythroplasia	benign neoplasm of hair follicles benign neoplasm of sebaceous glands benign neoplasm of sweat glands

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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