Z3A.35 – 35 weeks gestation of pregnancy

ICD-10-CM 2027 diagnosis code · Persons encountering health services in circumstances related to reproduction

Billable code

ICD-10-CM code Z3A.35

Code: Z3A.35 (claims format: Z3A35)
Description: 35 weeks gestation of pregnancy
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z30-Z39 Persons encountering health services in circumstances related to reproduction
Parent codes: Z3A › Z3A.3

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Z3A – Weeks of gestation

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.

Index terms for Z3A.35

Entries in the ICD-10-CM alphabetic index that lead to this code:

Pregnancy, weeks of gestation, 35 weeks

Related codes in Z3A.3

Z3A.30 – 30 weeks gestation of pregnancyBillable
Z3A.31 – 31 weeks gestation of pregnancyBillable
Z3A.32 – 32 weeks gestation of pregnancyBillable
Z3A.33 – 33 weeks gestation of pregnancyBillable
Z3A.34 – 34 weeks gestation of pregnancyBillable
Z3A.36 – 36 weeks gestation of pregnancyBillable
Z3A.37 – 37 weeks gestation of pregnancyBillable
Z3A.38 – 38 weeks gestation of pregnancyBillable
Z3A.39 – 39 weeks gestation of pregnancyBillable

Frequently asked questions

What is ICD-10 code Z3A.35?

Z3A.35 is the ICD-10-CM code for 35 weeks gestation of pregnancy, in the block Z30-Z39 (Persons encountering health services in circumstances related to reproduction).

Is Z3A.35 a billable code?

Yes. Z3A.35 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z3A.35 belong to?

It belongs to category Z3A – Weeks of gestation.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.