Is D04 a billable ICD-10-CM code?

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

Where does D04 sit in the tabular list?

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

What cannot be coded together with D04?

D04 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

D04

D04 — Carcinoma in situ of skin

Non-billable headerICD-10-CM

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

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Other codes that can never be billed with D04

These codes carry an Excludes1 note pointing at D04. 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 alone.

D00.0Carcinoma in situ of lip, oral cavity and pharynx
D02.3Carcinoma in situ of other parts of respiratory system
D05Carcinoma in situ of breast
D09.2Carcinoma in situ of eye
D01.3Carcinoma in situ of anus and anal canal

Risk adjustment

D04 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 to one of these instead D04

10 child codes. Green means billable.

Questions about D04

Is D04 a billable ICD-10-CM code?: No. D04 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does D04 sit in the tabular list?: Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).
What cannot be coded together with D04?: D04 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.