ICD-10-CM Current in FY 2027

Z17.421

Hormone receptor negative with human epidermal growth factor receptor 2 negative status

Hierarchy

Where Z17.421 sits in the official hierarchy. Each level is the code it is classified under.

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Inclusion Terms

HR- with HER2-

Inclusion Terms

TNBC

Inclusion Terms

Triple negative breast cancer

Code First

malignant neoplasm, such as:

Inherited from Z17 — Estrogen, and other hormones and factors receptor status

Code First

malignant neoplasm of breast ( C50 .-)

Inherited from Z17 — Estrogen, and other hormones and factors receptor status

Code First

malignant neoplasm of ovary ( C56 .-)

Inherited from Z17 — Estrogen, and other hormones and factors receptor status

How Z17.421 appears in each release imported from the official files, newest first.

FY 2027 Effective October 1, 2026
Current

Hormone receptor negative with human epidermal growth factor receptor 2 negative status
FY 2026 Effective October 1, 2025
Unchanged

Hormone receptor negative with human epidermal growth factor receptor 2 negative status

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

MedCodeSearch is an independent reference service and is not affiliated with CMS, CDC, or the U.S. government.

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