Code
Hierarchy
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Z00-Z99 Factors influencing health status and contact with health services (Z00-Z99)
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Z30-Z39 Persons encountering health services in circumstances related to reproduction (Z30-Z39)
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Z3A Weeks of gestation
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Z3A.2 Weeks of gestation of pregnancy, weeks 20-29
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Z3A.20 20 weeks gestation of pregnancy
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Z3A.21 21 weeks gestation of pregnancy
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Z3A.22 22 weeks gestation of pregnancy
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Z3A.23 23 weeks gestation of pregnancy
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Z3A.24 24 weeks gestation of pregnancy
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Z3A.25 25 weeks gestation of pregnancy
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Z3A.26 26 weeks gestation of pregnancy
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Z3A.27 27 weeks gestation of pregnancy
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Z3A.28 28 weeks gestation of pregnancy
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Z3A.29 29 weeks gestation of pregnancy
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Notes
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Codes from category Z3A are for use, only on the maternal record, to indicate the weeks of gestation of the pregnancy, if known.
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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:
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(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.
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(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.