Non-Billable / Non-Specific Code
ICD-10-CM Z17.42 is the diagnosis code for Hormone receptor negative. This code falls under the section "Estrogen, and other hormones and factors receptor status" within Chapter 21 — Factors influencing health status and contact with health services (Z00-Z99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where Z17.42 sits in the ICD-10-CM classification helps ensure proper coding:
No, Z17.42 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Z17.42 is the ICD-10-CM diagnosis code for "Hormone receptor negative". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of Z17.42 is Z17.4 ("Combined receptor status"). Z17.42 provides a more specific classification within this category.
Z17.42 is located in Section Z17 — "Estrogen, and other hormones and factors receptor status" within Chapter 21 of the ICD-10-CM Tabular List.
Z17.42 has 2 sub-code(s) that provide more specific detail: Z17.420, Z17.421.
Use Z17.42 when the patients documented diagnosis matches "Hormone receptor negative" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Hormone receptor negative is Z17.42.
No, Z17.42 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Z17.42 is in Chapter 21 of the ICD-10-CM Tabular List.
Yes, Z17.42 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.