C44.1 vs C49.0
C44.1 (Other and unspecified malignant neoplasm of skin of eyelid, including canthus) compared with C49.0 (Malignant neoplasm of connective and soft tissue of head, face and neck), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. C44.1 carries an Excludes1 note covering C49.0: “connective tissue of eyelid (C49.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| C44.1Other and unspecified malignant neoplasm of skin of eyelid, including canthus | C49.0Malignant neoplasm of connective and soft tissue of head, face and neck | |
|---|---|---|
| Billing status | Non-billable header Report instead: C44.101, C44.1021, C44.1022, C44.1091, C44.1092 | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Other and unspecified malignant neoplasm of skin of eyelid, including canthus is a non-billable ICD-10-CM category code (C44.1). | Malignant neoplasm of connective and soft tissue of head, face and neck is a billable ICD-10-CM diagnosis code (C49.0). |
| Includes | malignant neoplasm of sebaceous glands malignant neoplasm of sweat glands | malignant neoplasm of blood vessel malignant neoplasm of bursa malignant neoplasm of cartilage malignant neoplasm of fascia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources