Is D09 a billable ICD-10-CM code?

No. D09 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does D09 sit in the tabular list?

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

What cannot be coded together with D09?

D09 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

D09

D09 — Carcinoma in situ of other and unspecified sites

Non-billable headerICD-10-CM

D09 is a non-billable header ICD-10-CM code for carcinoma in situ of other and unspecified sites. 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.

melanoma in situ (D03.-)

Other codes that can never be billed with D09

These codes carry an Excludes1 note pointing at D09. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D09 alone.

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

Risk adjustment

D09 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 D09

6 child codes. Green means billable.

Questions about D09

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