Z3A

Non-billable

Weeks of gestation

Weeks of gestation

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Child Codes

5

Cross-references

UMLS

C1135241

Coding Notes

Code First

The underlying condition must be sequenced before this code

Child Codes (5)

Z3A.0

Weeks of gestation of pregnancy, unsp 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

Also Known As / Clinical Terms(6)

UMLS

Common questions

What is the ICD-10-CM code for Weeks of gestation?

Weeks of gestation is coded as Z3A in ICD-10-CM.

What is ICD-10 code Z3A?

Z3A is the ICD-10-CM identifier for Weeks of gestation. It is included in the official 2025 release of ICD-10-CM published by CMS and NCHS.

Why is Z3A non-billable?

Z3A is a category code; ICD-10-CM requires the most specific child code for claim submission. The billable child codes under Z3A are: Z3A.00, Z3A.01, Z3A.08, Z3A.09, Z3A.10, Z3A.11, and 18 more.

What chapter does Z3A belong to?

Z3A is in Chapter 22: Factors Influencing Health Status and Contact With Health Services.

What are the synonyms for Weeks of gestation?

In clinical text, weeks of gestation is also written as: gestation weeks, gestations weeks, week gestation, weeks gestation. Sourced from UMLS Metathesaurus.

What is the UMLS mapping for Z3A?

Z3A maps to UMLS C1135241.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.