C44.390 vs D49.2

C44.390 (Other specified malignant neoplasm of skin of unspecified parts of face) compared with D49.2 (Neoplasm of unspecified behavior of bone, soft tissue, and skin), from the official CMS tabular data. C44.390 and D49.2 name the same anatomical site (columnella) with a different neoplasm behavior. MedCoder-derived

Relationship

Informational

Neoplasm table relationship

C44.390

Other specified malignant neoplasm of skin of unspecified parts of face

↔

D49.2

Neoplasm of unspecified behavior of bone, soft tissue, and skin

Same anatomical site, different neoplasm behavior.

Same site — unspecified behavior (columnella)

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. C44.390 and D49.2 name the same anatomical site (columnella) 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

	C44.390Other specified malignant neoplasm of skin of unspecified parts of face	D49.2Neoplasm of unspecified behavior of bone, soft tissue, and skin
Billing status	Billable	Billable
Classification	C00-D49 — Neoplasms (C00-D49)	C00-D49 — Neoplasms (C00-D49)
Definition	Other specified malignant neoplasm of skin of unspecified parts of face is a billable ICD-10-CM diagnosis code (C44.390).	Neoplasm of unspecified behavior of bone, soft tissue, and skin is a billable ICD-10-CM diagnosis code (D49.2).
Includes	malignant neoplasm of sebaceous glands malignant neoplasm of sweat glands	'growth' NOS neoplasm NOS new growth NOS tumor NOS

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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