Z17.420 — Hormone receptor negative with human epidermal growth factor receptor 2 positive status
Z17.420 is a billable, specific ICD-10-CM code for hormone receptor negative with human epidermal growth factor receptor 2 positive status. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- HR- with HER2+
Risk adjustment
Z17.420 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.
How Z17.420 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 Z17.420.
- Status›combined receptor›negative›hormone receptor negative with human epidermal growth factor receptor 2 positive
Related codes at this level
Codes that share Z17.42. If Z17.420 is not quite right, the correct code is usually one of these.
Questions about Z17.420
- Is Z17.420 a billable ICD-10-CM code?
- Yes. Z17.420 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z17.420 sit in the tabular list?
- Factors influencing health status and contact with health services (Z00-Z99), in the block Estrogen, and other hormones and factors receptor status (Z17).