Is D04.9 a billable ICD-10-CM code?

Yes. D04.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does D04.9 sit in the tabular list?

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

What cannot be coded together with D04.9?

D04.9 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 D04.9 (D04) and apply to it just the same.

D04.9

D04.9 — Carcinoma in situ of skin, unspecified

Billable / specific codeICD-10-CM

D04.9 is a billable, specific ICD-10-CM code for carcinoma in situ of skin, unspecified. It is valid for submission on a claim.

Excludes1 inherited from the categories above D04.9

These are not written on D04.9, but they bind it: a note on a category applies to every code beneath it. Billing D04.9 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.-)

Risk adjustment

D04.9 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

D04.9 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56695Billing and Coding: Implantable Infusion Pump
A56748Billing and Coding: White Cell Colony Stimulating Factors
A57161Billing and Coding: Benign Skin Lesion Removal (Excludes Actinic Keratosis, and Mohs)
A57788Billing and Coding: Peripheral Nerve Blocks

How D04.9 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to D04.9.

Adenocarcinoma›apocrine›in situ›unspecified site

Code history

D04.9 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 D04. If D04.9 is not quite right, the correct code is usually one of these.

Questions about D04.9

Is D04.9 a billable ICD-10-CM code?: Yes. D04.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D04.9 sit in the tabular list?: Neoplasms (C00-D49), in the block In situ neoplasms (D00-D09).
What cannot be coded together with D04.9?: D04.9 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 D04.9 (D04) and apply to it just the same.