2026 ICD-10-CM Diagnosis Code Z19.1Hormone sensitive malignancy status

ICD-10-CM Codes›Z00–Z99›Z19›Z19

ICD-10-CM Z19.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z19.1 is a billable ICD-10-CM diagnosis code for hormone sensitive malignancy status. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as hormone sensitive prostate cancer. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genetic susceptibility to disease; and Malignant neoplasm, unspecified.

Code Identity

ICD-10-CM Code
Z19.1
Billable Status
Yes — Valid for Submission
Code Describes
Hormone sensitive malignancy status
Short Description
Hormone sensitive malignancy status
Same as the full description in the CMS dataset.
Parent Code
Z19
Hormone sensitivity malignancy status

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ19Hormone sensitivity malignancy status
CategoryZ19Hormone sensitivity malignancy status
This CodeZ19.1Hormone sensitive malignancy status

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z19.1.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z19.1 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hormone sensitive prostate cancer

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Status(post)
      • malignancy
        • hormone sensitive

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC029
Genetic susceptibility to disease
Default principal diagnosis: inpatient No · outpatient No
CCSR NEO071
Malignant neoplasm, unspecified
Default principal diagnosis: inpatient No · outpatient No

Convert Z19.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
No Map There is no ICD-9 equivalent for this code.

Code History & ChangesHistory

Replacement Z19.1 replaces the following previously assigned code(s):

  • R97.8 - Other abnormal tumor markers
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z19.1Overview

Is Z19.1 (Hormone sensitivity malignancy status) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report hormone sensitive malignancy status on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z19.1 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because hormone sensitive malignancy status describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z19.1 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for hormone sensitive malignancy status on inpatient claims.