Is D04.2 a billable ICD-10-CM code?

No. D04.2 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does D04.2 sit in the tabular list?

Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).

What cannot be coded together with D04.2?

D04.2 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 D04.2 (D04) and apply to it just the same.

D04.2

D04.2 — Carcinoma in situ of skin of ear and external auricular canal

Non-billable headerICD-10-CM

D04.2 is a non-billable header ICD-10-CM code for carcinoma in situ of skin of ear and external auricular canal. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above D04.2

These are not written on D04.2, but they bind it: a note on a category applies to every code beneath it. Billing D04.2 with anything listed here is a denial.

Written on D04 — Carcinoma in situ of skin

erythroplasia of Queyrat (penis) NOS (D07.4)
melanoma in situ (D03.-)

Other codes that can never be billed with D04.2

These codes carry an Excludes1 note pointing at D04.2. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D04.2 alone.

D02.3Carcinoma in situ of other parts of respiratory system

Risk adjustment

D04.2 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

D04.2 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 D04.2

3 child codes. Green means billable.

Related codes at this level

Codes that share D04. If D04.2 is not quite right, the correct code is usually one of these.

Questions about D04.2

Is D04.2 a billable ICD-10-CM code?: No. D04.2 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does D04.2 sit in the tabular list?: Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).
What cannot be coded together with D04.2?: D04.2 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 D04.2 (D04) and apply to it just the same.