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Z3A - Weeks of gestation

ICD-10-CM Chapter 21: Factors influencing health status and contact with health services · Z30-Z39 Persons encountering health services in circumstances related to reproduction (Z30-Z39) · Top-level category · FY2027

Coding Guidance

Z3A is a non-billable heading. Report one of the 5 more specific codes below.

Includes, Excludes and Coding Notes

Code FirstFrom Z3A

Sequence the underlying condition before this code.

  • obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)
NotesFrom Z3A

Instructional notes from the ICD-10-CM tabular list.

  • Codes from category Z3A are for use, only on the maternal record, to indicate the weeks of gestation of the pregnancy, if known.
NotesFrom Chapter Z00-Z99

Instructional notes from the ICD-10-CM tabular list.

  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

More Specific Codes (5)

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→