Z17.0 — Estrogen receptor positive status [ER+]
Z17.0 is a billable, specific ICD-10-CM code for estrogen receptor positive status [er+]. It is valid for submission on a claim.
Risk adjustment
Z17.0 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
Z17.0 is named in 20 Medicare coverage policies — 20 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A53104Billing and Coding: MolDX: MammaPrint
- A53105Billing and Coding: MolDX: Oncotype DX® Breast Cancer Assay
- A53558Billing and Coding: MolDX: PIK3CA Gene Tests
- A54194Billing and Coding: MolDX: MammaPrint
How Z17.0 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 Z17.0.
- Status›estrogen receptor›positive
Related codes at this level
Codes that share Z17. If Z17.0 is not quite right, the correct code is usually one of these.
Questions about Z17.0
- Is Z17.0 a billable ICD-10-CM code?
- Yes. Z17.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z17.0 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).