Z3A Weeks of gestation

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Weeks of gestation is Z3A (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

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
Code First
  • obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)

Notes

  • Codes from category Z3A are for use, only on the maternal record, to indicate the weeks of gestation of the pregnancy, if known.

References

Related Codes

More Specific Codes

Z3A.0 Weeks of gestation of pregnancy, unspecified or less than 10 weeks Z3A.00 Weeks of gestation of pregnancy not specified Z3A.01 Less than 8 weeks gestation of pregnancy Z3A.08 8 weeks gestation of pregnancy Z3A.09 9 weeks gestation of pregnancy Z3A.1 Weeks of gestation of pregnancy, weeks 10-19 Z3A.10 10 weeks gestation of pregnancy Z3A.11 11 weeks gestation of pregnancy Z3A.12 12 weeks gestation of pregnancy Z3A.13 13 weeks gestation of pregnancy Z3A.14 14 weeks gestation of pregnancy Z3A.15 15 weeks gestation of pregnancy Z3A.16 16 weeks gestation of pregnancy Z3A.17 17 weeks gestation of pregnancy Z3A.18 18 weeks gestation of pregnancy Z3A.19 19 weeks gestation of pregnancy Z3A.2 Weeks of gestation of pregnancy, weeks 20-29 Z3A.20 20 weeks gestation of pregnancy Z3A.21 21 weeks gestation of pregnancy Z3A.22 22 weeks gestation of pregnancy Z3A.23 23 weeks gestation of pregnancy Z3A.24 24 weeks gestation of pregnancy Z3A.25 25 weeks gestation of pregnancy Z3A.26 26 weeks gestation of pregnancy Z3A.27 27 weeks gestation of pregnancy Z3A.28 28 weeks gestation of pregnancy Z3A.29 29 weeks gestation of pregnancy Z3A.3 Weeks of gestation of pregnancy, weeks 30-39 Z3A.30 30 weeks gestation of pregnancy Z3A.31 31 weeks gestation of pregnancy

Related Codes in Z3A

Z3A.0 Weeks of gestation of pregnancy, unspecified or less than 10 weeks Z3A.00 Weeks of gestation of pregnancy not specified Z3A.01 Less than 8 weeks gestation of pregnancy Z3A.08 8 weeks gestation of pregnancy Z3A.09 9 weeks gestation of pregnancy Z3A.1 Weeks of gestation of pregnancy, weeks 10-19 Z3A.10 10 weeks gestation of pregnancy Z3A.11 11 weeks gestation of pregnancy Z3A.12 12 weeks gestation of pregnancy Z3A.13 13 weeks gestation of pregnancy Z3A.14 14 weeks gestation of pregnancy Z3A.15 15 weeks gestation of pregnancy Z3A.16 16 weeks gestation of pregnancy Z3A.17 17 weeks gestation of pregnancy Z3A.18 18 weeks gestation of pregnancy Z3A.19 19 weeks gestation of pregnancy Z3A.2 Weeks of gestation of pregnancy, weeks 20-29 Z3A.20 20 weeks gestation of pregnancy Z3A.21 21 weeks gestation of pregnancy Z3A.22 22 weeks gestation of pregnancy
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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