Is C44.129 a billable ICD-10-CM code?

No. C44.129 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C44.129 sit in the tabular list?

Neoplasms (C00-D49), in the block Melanoma and other malignant neoplasms of skin (C43-C44).

What cannot be coded together with C44.129?

C44.129 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C44.129 (C44.1, C44) and apply to it just the same.

C44.129

C44.129 — Squamous cell carcinoma of skin of left eyelid, including canthus

Non-billable headerICD-10-CMleft

C44.129 is a non-billable header ICD-10-CM code for squamous cell carcinoma of skin of left eyelid, including canthus. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above C44.129

These are not written on C44.129, but they bind it: a note on a category applies to every code beneath it. Billing C44.129 with anything listed here is a denial.

Written on C44.1 — Other and unspecified malignant neoplasm of skin of eyelid, including canthus

connective tissue of eyelid (C49.0)

Written on C44 — Other and unspecified malignant neoplasm of skin

Kaposi's sarcoma of skin (C46.0)
malignant melanoma of skin (C43.-)
malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2)
Merkel cell carcinoma (C4A.-)

Other codes that can never be billed with C44.129

These codes carry an Excludes1 note pointing at C44.129. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C44.129 alone.

C76Malignant neoplasm of other and ill-defined sites

Risk adjustment

C44.129 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

C44.129 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead C44.129

2 child codes. Green means billable.

Related codes at this level

Codes that share C44.12. If C44.129 is not quite right, the correct code is usually one of these.

Questions about C44.129

Is C44.129 a billable ICD-10-CM code?: No. C44.129 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C44.129 sit in the tabular list?: Neoplasms (C00-D49), in the block Melanoma and other malignant neoplasms of skin (C43-C44).
What cannot be coded together with C44.129?: C44.129 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C44.129 (C44.1, C44) and apply to it just the same.