Is D09.9 a billable ICD-10-CM code?

Yes. D09.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does D09.9 sit in the tabular list?

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

What cannot be coded together with D09.9?

D09.9 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 D09.9 (D09) and apply to it just the same.

D09.9

D09.9 — Carcinoma in situ, unspecified

Billable / specific codeICD-10-CM

D09.9 is a billable, specific ICD-10-CM code for carcinoma in situ, unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above D09.9

These are not written on D09.9, but they bind it: a note on a category applies to every code beneath it. Billing D09.9 with anything listed here is a denial.

Written on D09 — Carcinoma in situ of other and unspecified sites

melanoma in situ (D03.-)

Risk adjustment

D09.9 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.

Medicare coverage

D09.9 is named in 5 Medicare coverage policies — 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57788Billing and Coding: Peripheral Nerve Blocks
A57788Billing and Coding: Peripheral Nerve Blocks
A58652Billing and Coding: MolDX: Lab-Developed Tests for Inherited Cancer Syndromes in Patients with Cancer
A58679Billing and Coding: MolDX: Lab-Developed Tests for Inherited Cancer Syndromes in Patients with Cancer

Code history

D09.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share D09. If D09.9 is not quite right, the correct code is usually one of these.

Questions about D09.9

Is D09.9 a billable ICD-10-CM code?: Yes. D09.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D09.9 sit in the tabular list?: Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).
What cannot be coded together with D09.9?: D09.9 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 D09.9 (D09) and apply to it just the same.