Z3A.1 Weeks of gestation of pregnancy, weeks 10-19

The ICD-10-CM code for Weeks of gestation of pregnancy, weeks 10-19 is Z3A.1 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

21: Factors influencing health status and contact with health services (Z00-Z99)

Section

Z30-Z39: Persons encountering health services in circumstances related to reproduction (Z30-Z39)

Category Z3A

44 codes (38 billable)

FY2026 Status

Stable since FY2024

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool