Z15

ICD-10Non-billable category

Genetic susceptibility to disease

Official ICD-10-CM descriptor (FY2026)

Genetic susceptibility to disease

Z15 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Includes

  • confirmed abnormal gene

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • chromosomal anomalies (Q90-Q99)

Use additional code

Report an additional code to identify the associated condition.

  • code, if applicable, for any associated family history of the disease (Z80-Z84)

More specific codes under Z15

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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