Z37.4
Twins, both stillborn
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
stillbirth (P95)
This category is intended for use as an additional code to identify the outcome of delivery on the mother's record. It is not for use on the newborn record.
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.
Official Guidelines for Z37.4
FY 2026 ›Sections that reference Z37.4
- I.C.15.b.5)Outcome of deliveryChapter 15
A code from category Z37, Outcome of delivery, should be included on every maternal record when a delivery has occurred. …
- I.C.15.n.3)Outcome of delivery for O80Chapter 15
Z37.0, Single live birth, is the only outcome of delivery code appropriate for use with O80.
- I.C.15.q.1)Abortion with Liveborn FetusChapter 15
… results in a liveborn fetus, assign code Z33.2, Encounter for elective termination of pregnancy and a code from category Z37, Outcome of Delivery.
- I.C.21.c.11)Encounters for Obstetrical and Reproductive Services
… The outcome of delivery, category Z37, should be included on all maternal delivery records. …
- I.B.3Code or codes from A00.0 through T88.9, Z00-Z99.8, U00-U85Conventions & general rules
The appropriate code or codes from A00.0 through T88.9, Z00-Z99.8, and U00-U85 must be used to identify diagnoses, symptoms, conditions, problems, complaints or other reason(s) for the …
- I.C.20.a.1)Used with any code in the range of A00.0-T88.9, Z00-Z99Chapter 20
An external cause code may be used with any code in the range of A00.0-T88.9, Z00-Z99, classification that represents a health condition due to an external cause. …
Showing 6 of 8. Search the guidelines for Z37. Sections whose FY 2026 text names Z37.4, its Z37 category, or a range containing it — the chapter guidance above is the authoritative source.
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