Z3A.1Header code — not billable
Weeks of gestation of pregnancy, weeks 10-19
- Chapter
- 21. Factors influencing health status and contact with health services
- Category
- Z3A
- Effective date
- October 1, 2026
Related codes in category Z3A
Z3AWeeks of gestationZ3A.0Weeks of gestation of pregnancy, unsp or less than 10 weeksZ3A.00Weeks of gestation of pregnancy not specifiedYesZ3A.01Less than 8 weeks gestation of pregnancyYesZ3A.088 weeks gestation of pregnancyYesZ3A.099 weeks gestation of pregnancyYesZ3A.1010 weeks gestation of pregnancyYesZ3A.1111 weeks gestation of pregnancyYesZ3A.1212 weeks gestation of pregnancyYesZ3A.1313 weeks gestation of pregnancyYesZ3A.1414 weeks gestation of pregnancyYesZ3A.1515 weeks gestation of pregnancyYes
Frequently asked questions
What is ICD-10 code Z3A.1?
Z3A.1 is an ICD-10-CM diagnosis code for Weeks of gestation of pregnancy, weeks 10-19.
Is Z3A.1 a billable code?
No. Z3A.1 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is Z3A.1 in?
Z3A.1 falls under Chapter 21: Factors influencing health status and contact with health services.
When did Z3A.1 become effective?
Z3A.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Z3A.1?
Z3A.1 belongs to category Z3A, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.