Z3A.20 20 weeks gestation of pregnancy
ICD-10-CM · CMS code reference
Official ICD-10-CM description: 20 weeks gestation of pregnancy
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Note
- Codes from category Z3A are for use, only on the maternal record, to indicate the weeks of gestation of the pregnancy, if known.
Code first
Code the underlying condition first, then this code.
- obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)
Related codes
Z3A.2121 weeks gestation of pregnancy ICD-10-CMZ3A.2222 weeks gestation of pregnancy ICD-10-CMZ3A.2323 weeks gestation of pregnancy ICD-10-CMZ3A.2424 weeks gestation of pregnancy ICD-10-CMZ3A.2525 weeks gestation of pregnancy ICD-10-CMZ3A.2626 weeks gestation of pregnancy ICD-10-CMZ3A.2727 weeks gestation of pregnancy ICD-10-CMZ3A.2828 weeks gestation of pregnancy ICD-10-CM
Common questions
Is Z3A.20 a billable code?
Yes. Z3A.20 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.