D04.9 — Carcinoma in situ of skin, unspecified
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.
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
Related codes at this level
Codes that share D04. If D04.9 is not quite right, the correct code is usually one of these.
- D04.0Carcinoma in situ of skin of lip
- D04.1Carcinoma in situ of skin of eyelid, including canthus
- D04.2Carcinoma in situ of skin of ear and external auricular canal
- D04.3Carcinoma in situ of skin of other and unspecified parts of face
- D04.4Carcinoma in situ of skin of scalp and neck
- D04.5Carcinoma in situ of skin of trunk
- D04.6Carcinoma in situ of skin of upper limb, including shoulder
- D04.7Carcinoma in situ of skin of lower limb, including hip
- D04.8Carcinoma in situ of skin of other sites
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).