Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Unspecified malignant neoplasm of skin of other parts of face is a billable ICD-10-CM diagnosis code (C44.309).

Sequencing, inclusion, and exclusion notes published for C44.309 in the official ICD-10-CM tabular list.

Conditions the official ICD-10-CM tabular list includes under this code.

Conditions that can never be reported with this code; the two are mutually exclusive.

Official ICD-10-CM classifications closest to C44.309 in its code family, with their registry titles.

C44.299 — Other specified malignant neoplasm of skin of left ear and external auricular canal
C44.3 — Other and unspecified malignant neoplasm of skin of other and unspecified parts of face
C44.30 — Unspecified malignant neoplasm of skin of other and unspecified parts of face
C44.300 — Unspecified malignant neoplasm of skin of unspecified part of face
C44.301 — Unspecified malignant neoplasm of skin of nose
C44.31 — Basal cell carcinoma of skin of other and unspecified parts of face
C44.310 — Basal cell carcinoma of skin of unspecified parts of face
C44.311 — Basal cell carcinoma of skin of nose
C44.319 — Basal cell carcinoma of skin of other parts of face
C44.32 — Squamous cell carcinoma of skin of other and unspecified parts of face

Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.