Z3A

Non-Billable
ChapterZ00–Z99
Rankcategory
Official Description

Weeks of gestation

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 21: Factors Influencing Health Status and Contact with Health Services (Z00-Z99).

Instructional Notes

Code First

Clinical Hierarchy

CH21Factors influencing health status and contact with health services (Z00-Z99)
Z30-Z39Persons encountering health services in circumstances related to reproduction (Z30-Z39)
Z3AWeeks of gestation
Z3A.0Weeks of gestation of pregnancy, unspecified or less than 10 weeks
Z3A.1Weeks of gestation of pregnancy, weeks 10-19
Z3A.2Weeks of gestation of pregnancy, weeks 20-29
Z3A.3Weeks of gestation of pregnancy, weeks 30-39
Z3A.4Weeks of gestation of pregnancy, weeks 40 or greater

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to Z3A. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Pregnancy (single) (uterine)25 unique routes
weeks of gestation(25 variants)
10 weeks→Z3A
11 weeks→Z3A
12 weeks→Z3A
13 weeks→Z3A
14 weeks→Z3A
15 weeks→Z3A
16 weeks→Z3A
17 weeks→Z3A
18 weeks→Z3A
19 weeks→Z3A
20 weeks→Z3A
21 weeks→Z3A
22 weeks→Z3A
23 weeks→Z3A
24 weeks→Z3A
25 weeks→Z3A
26 weeks→Z3A
27 weeks→Z3A
28 weeks→Z3A
29 weeks→Z3A
30 weeks→Z3A
31 weeks→Z3A
32 weeks→Z3A
33 weeks→Z3A
34 weeks→Z3A

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

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