Z3A.01

Less than 8 weeks gestation of pregnancy is coded as Z3A.01 in ICD-10-CM.

Z3A.01 is the ICD-10-CM identifier for Less than 8 weeks gestation of pregnancy. It is included in the official 2025 release of ICD-10-CM published by CMS and NCHS.

Yes, Z3A.01 is a billable / specific ICD-10-CM code that can be used to indicate a diagnosis on a medical claim.

Z3A.01 sits under Z3A.0 (Weeks of gestation of pregnancy, unsp or less than 10 weeks) in the ICD-10-CM hierarchy.

Z3A.01 is in Chapter 22: Factors Influencing Health Status and Contact With Health Services.

In clinical text, less than 8 weeks gestation of pregnancy is also written as: Gestation less than 9 weeks, Gestation period, 1 month, Gestation period, 1 week, Gestation period, 2 weeks, Gestation period, 3 weeks, Gestation period, 4 weeks, and 3 more. Sourced from SNOMED CT, UMLS Metathesaurus, and clinical-terms enrichment.

ICD-10-CM is a billing classification with broader categories than SNOMED CT’s clinical terminology. Z3A.01 captures the billing-level concept; SNOMED CT splits it into 8 clinical concepts: 37005007, 428058009, 44398003, 63110000, 74952004, and 3 more.