Z17.31

Billable

ChapterZ00–Z99

Ranksubcategory

Official Description

Human epidermal growth factor receptor 2 positive status

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99).

Instructional Notes

Includes

HER2+

General instructions are available for the parent sections:

View Z17 Notes

Clinical Hierarchy

CH21Factors influencing health status and contact with health services (Z00-Z99)

Z17Estrogen, and other hormones and factors receptor status

Z17.3Human epidermal growth factor 2 receptor

Z17.31Human epidermal growth factor receptor 2 positive status

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Z17.31:

categoryZ17

Estrogen, and other hormones and factors receptor status

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Z17.31. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

1 raw paths

Status (post)1 unique routes

human epidermal growth factor 2 receptor

positive→Z17.31

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 951

Other Factors Influencing Health Status

Cross Reference

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