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

Cite This Page

Reference Z3A with the canonical source and edition:

Z3A — Weeks of gestation. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/Z3A

Canonical URL: https://icd10codingpro.com/codes/Z3A

Related Codes

More Specific Codes

Z3A.0 Weeks of gestation of pregnancy, unspecified or less than 10 weeks Z3A.1 Weeks of gestation of pregnancy, weeks 10-19 Z3A.2 Weeks of gestation of pregnancy, weeks 20-29 Z3A.3 Weeks of gestation of pregnancy, weeks 30-39 Z3A.4 Weeks of gestation of pregnancy, weeks 40 or greater

All Codes in Z3A

Every most-specific code under Z3A Weeks of gestation (38 codes):

Show the complete Z3A code list
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.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.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.30 30 weeks gestation of pregnancy Z3A.31 31 weeks gestation of pregnancy Z3A.32 32 weeks gestation of pregnancy Z3A.33 33 weeks gestation of pregnancy Z3A.34 34 weeks gestation of pregnancy Z3A.35 35 weeks gestation of pregnancy Z3A.36 36 weeks gestation of pregnancy Z3A.37 37 weeks gestation of pregnancy Z3A.38 38 weeks gestation of pregnancy Z3A.39 39 weeks gestation of pregnancy Z3A.40 40 weeks gestation of pregnancy Z3A.41 41 weeks gestation of pregnancy Z3A.42 42 weeks gestation of pregnancy Z3A.49 Greater than 42 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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