Z15.1 – Genetic susceptibility to epilepsy and neurodevelopmental disorders

ICD-10-CM 2027 diagnosis code · Genetic carrier and genetic susceptibility to disease

Billable code

ICD-10-CM code Z15.1

Code: Z15.1 (claims format: Z151)
Description: Genetic susceptibility to epilepsy and neurodevelopmental disorders
Short description: Genetic susceptibility to epi and neurodevelopmental disord
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z14-Z15 Genetic carrier and genetic susceptibility to disease
Parent codes: Z15

Notes for Z15.1

Code also:

, if applicable, related disorders such as:
developmental and epileptic encephalopathy (G93.45)
developmental disorder of speech and language (F80.-)
developmental disorders of scholastic skills (F81.-)
epilepsy, by specific type (G40.-)
intellectual disabilities (F70-F79)
other neurodevelopmental disorder (F88)
pervasive developmental disorders (F84.-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Z15 – Genetic susceptibility to disease

Includes:

confirmed abnormal gene

Excludes1 (not coded here):

chromosomal anomalies (Q90-Q99)

Use additional code:

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

Index terms for Z15.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Z15

Frequently asked questions

What is ICD-10 code Z15.1?

Z15.1 is the ICD-10-CM code for genetic susceptibility to epilepsy and neurodevelopmental disorders, in the block Z14-Z15 (Genetic carrier and genetic susceptibility to disease).

Is Z15.1 a billable code?

Yes. Z15.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z15.1 belong to?

It belongs to category Z15 – Genetic susceptibility to disease.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.